GB/T 3264-1989 Technical requirements for sheet-fed offset printing presses
Some standard content:
National Standard of the People's Republic of China
Technical conditions for sheet-fed planographic offset press
Specifications for sheet-fed planographic offset press1 Subject content and scope of application
GB3264
Substitute GB 3264-82
This standard specifies the technical requirements, test methods, inspection rules and marking, packaging and storage of sheet-fed planographic offset press (hereinafter referred to as offset press).
This standard is applicable to various types of single-sheet single-color to multi-color offset presses. This standard does not apply to small offset presses. 2 Reference standards
GB788 Book and magazine format and format size GB5226 General technical conditions for electrical equipment of machine tools ZB J87 007.1 Method for compiling product models of printing presses JB8. Product label
3 Technical requirements
Offset presses should be manufactured in accordance with the provisions of this standard and in accordance with drawings and technical documents approved through the prescribed procedures. 3.2
Offset printing presses shall meet the requirements for printing paper of specified thickness, and ensure continuous completion of the operations from paper feeding, printing to paper collection. 3.3
Offset printing press model compilation shall comply with the provisions of ZBJ87 007.1 3.4
Printable paper format shall comply with the provisions of GB788. 3.5The maximum printing speed shall not be lower than the value specified in the following table. Maximum printing speed, sheets/h
Front, Quarto
Continuous paper feeding form
Single-sided printing form
Double-sided printing form
Single-sheet paper feeding form
Single-sided printing form
Double-sided printing form
6When paper feeding abnormality occurs during the printing process, it shall be able to automatically detect and send a stop signal, and the automatic interlocking device of the offset printing press shall work normally. 3.7 Overall quality
3.7.1 Single-sided printing form
The paper feeding accuracy of a single-unit printing machine shall not be less than 96% within 0.10 mm: b.
The paper feeding precision of a single-unit printing machine shall not be less than 96% within 0.12 mm; the transfer accuracy of a multi-unit printing machine shall not be less than 96% within 0.12 mm; the transfer accuracy of a multi-unit printing machine shall be 0.040 mm, the uniformity of the impression force shall be 15%, the stability of the positive impression force shall be 0.05, and the printed product shall have no obvious ink bars; approved by the Ministry of Machinery and Electronics Industry of the People's Republic of China on February 10, 1989 and implemented on January 1, 1990
There shall be no obvious ghosting in multi-color printing;
The paper-gripping teeth shall have sufficient bite force.
Double-sided printing form
GB 3264—89
Paper feeding accuracy shall not be less than 96% within 0.20m (excluding full-sheet specifications); Paper feeding precision 0.045mm (excluding full-sheet specifications): For full-sheet specifications, the position consistency of double-sided printing page numbers is 0.6mm; d.
Impression force uniformity 20%. Impression force stability 0.10; When double-sided full-page text is printed, the color should be uniform and full on the entire surface of the printed product, the handwriting should be clear, and there should be no hairiness. Noise (sound pressure level) should be less than 85 dB(A). 3.8
Assembly quality of main components
The vibration of the working surface of the wall bucket roller is not less than 0.03 mm. 3.9.1
The circular runout of the working surface of the yoke roller shall not exceed 0.08 mm3.9.2
The parallelism of two adjacent yokes shall not exceed 0.025 mm in the whole length. 3.9.3
The circular runout of the printing roll shall not exceed 0.025 mm, and the axial movement of the fixed printing roll shall not exceed 0.03 mm3.9.5
The axial movement of the adjustable printing roll shall not exceed 0.04 mm. The axial movement of the paper feeder shall not exceed 0.03 mm. 3.104
Safety and interlocking devices shall be sensitive and reliable.
Electrical equipment shall comply with the provisions of GB5226. 3.12 Appearance quality
3.12.1 The exposed non-processed surface shall not have defects such as bulges, depressions, pores and scratches. 3.12.2 The paint should be firm, flat, smooth and uniform in color, and should not have defects that damage the appearance. 3.13 Quality guarantee period
If the user complies with the provisions of the offset printing machine manual, within one year from the date the offset printing machine arrives at the receiving location, if the offset printing machine is damaged or cannot be operated normally due to poor manufacturing quality, the manufacturer shall be responsible for free repair or replacement of parts. 4 Test method
Idle running test
The offset printing machine should be tested for an idle running of no less than 3 hours, of which the full-speed idle running time should be no less than 0.5 hours. During the test, the following should be checked: a. The machine should run smoothly, the transmission should be normal, and all parts and components should move accurately and in coordination. There should be no abnormal noise or spontaneous movement; b. The electrical system should be sensitive and reliable;
The lubrication system should work reliably without oil leakage; c. The protective device should be firm and reliable,
The bearing temperature rise should not exceed 35°C.
4. 2 Paper feeding test
During paper feeding, any abnormal paper feeding interruption, paper jam, paper tearing by the paper biting teeth, messy paper, uneven paper collection, etc. are all called paper feeding failures.
4.2.1 Full-speed paper feeding test
When the offset printing machine is closed and does not print, use 90~120/m coated paper or offset paper with the offset printing machine's rated maximum paper format, feed the paper for not less than 30 tnin at the offset printing machine's rated maximum printing speed, and visually check the paper feeding failure. 4.2.2 Paper adaptability test
When the offset press is pressed but not printing, feed paper continuously for not less than 50 sheets at a printing speed of not less than 3500 sheets/s. The paper ranges are the limit values specified by the offset press, and the paper formats are the rated paper formats of the offset press. Visually check for paper feeding problems. 4.3 Printing testbzxz.net
4.3.1 Test conditions
GB3264-B9
a. The printing environment temperature is 20±2℃, and the relative humidity is 55%~65%: b. The printing paper is 90~120g/m2 coated paper or offset paper, and the paper format is the rated maximum paper format of the offset press; the printing plate should meet the rated maximum printing format of the offset press, and the test plate specified in Appendix A (Supplement) should be printed. The inspection plates for paper feeding stability, transfer stability and other items can be separated; d. The printing ink is magenta primary ink. 4.3.2 Comprehensive quality test
4.3.2.1 Overprint test for paper feed stability of single printing unit a.
According to the format specified in Appendix A (Supplement), carry out the first printing for each impression group at the rated maximum printing speed of the offset printing press: then adjust the position of the overprint cross line relative to the first print by 0.5 to 1.0 m in the horizontal and vertical directions, and keep other conditions unchanged, and carry out the second printing, taking 75 consecutive print samples
b. If the printing conditions specified in Article 4.3.1a of this standard are not met, the overprint test may be carried out at 85% of the rated maximum printing speed of the offset printing press.
4.3.2.2 Overprint test for transfer stability of multi-unit printing press a: This test is only applicable to single-sided multi-color printing; b. According to the format specified in Appendix A (Supplement), a single-feed multi-color overprint is performed at the rated maximum printing speed of the offset printing press and the specified number of printing colors, and 75 consecutive print samples are taken;
If the printing conditions specified in Article 4.3.1a of this standard are not met, the overprint test can be performed at the rated maximum printing speed of the offset printing press of 80°. c.
4.3.2.3 Overprint inspection and calculation of feeding and transfer stability
The inspection of overprint precision and calculation of feeding and transfer precision are measured using a reading microscope with a graduation value of 0.01 tmm. 2.1 The same side width m of the three cross lines at the two positions of the overprinted cross lines A and B in the test sample and the same side width mi of the overprinted cross lines of each color relative to the first color in the test sample of the standard 4.3.2.2. Each overprinted cross line must check the three overprint values at the two positions of A and B: calculate its overprint precision o according to formula (1), and the only abnormal value in the sample data can be eliminated according to the principle of Appendix B (Supplement); the paper feeding precision of the offset printing machine is the maximum value of the overprint precision of the corresponding sample.
(Okai-ri)
Where: 8: I-line same side width, m; 5
f - sample order (1,2.-75)
——the number of colors at the measurement position of the overprint (overprint) cross line (=1.23).
b. Inspection and calculation of overprint accuracy
Use the graduation value as 0.01 The reading microscope of mm is used to measure 4.3.2.1 (no need to stagger the crosshairs for one printing) and 4.3.2.In the two tests, the three width limit values of the cross lines at the two positions A and R of the two samples are respectively taken, and the difference between the value and the actual width of the cross lines is calculated. The overprint accuracy is the percentage of this difference in the specified value in 3.7.1A or 3.7.2a of this standard. The paper feeding accuracy of a single-unit printing press and the transfer accuracy of a multi-unit printing press are the maximum values of the overprint accuracy of the corresponding samples. 4.3.2.4 Printing test of uniformity and stability of impression force CB3264-89
According to the format specified in Appendix A (supplement) of this standard, each printing unit is printed at 50% of the maximum printing speed of the offset printing press. Take 50 continuous printing samples for each, and use a densitometer to measure the uniformity and stability of impression force on each sample. Check the density value D of the color block representing each impression group in the strip, calculate the uniformity of the ink layer n according to formula (2), and calculate the ink application stability R according to formula (3). The uniformity and stability of the offset printing press’s impression force is the maximum value of the uniformity of the plastic layer and the stability of ink application in each sample; there should be no obvious ink bars on the screen. IDrm = Dmlor × 100%
Wherein. D.
Din D density value of the color block on the sample:
(Din D)2
Same as the color block density value on the sample;
Sample sequence (—1,2,..,50)
Check bar sequence = 1.2,,20).
4.3.2.5 Ghosting test for multi-color printing
Visual inspection: There should be no obvious ghosting of the dots in the large screen area of the sample tested in 4.3.2.4 of this standard. 4.3.2.6 Full-page solid printing test
Test each unit separately at 50% of the rated maximum printing speed of the offset printing machine. The full-page solid density is above 1.0. Check that the paper-gripping teeth have sufficient bite force.
4.3.2.7 Double-sided full-page text printing test
According to the provisions of Article 4.3.2.4 of this standard, take one sheet out of every five sheets and a total of 10 sheets for testing. It should comply with the provisions of Article 3.7.2c of this standard. 4.4 Noise test
Turn on all noise sources. When the offset printing machine is running at the rated maximum printing speed, use an ordinary sound level meter to measure the noise of the offset printing machine with the "slow" gear A weighting. The height of the microphone from the ground is 1.5m. The horizontal position of the microphone is shown in the figure below, where point 13 is the maximum noise point for the patrol measurement. When the distance between two measuring points on the measurement track L is less than 2m, measuring points 4, 6, 10, and 12 can be cancelled. Reference outer wheel nose line
Measurement line rail penetration
GB 326489
Offset printing press noise is calculated as the arithmetic mean of the noise at each measuring point, and the test result shall comply with the provisions of Article 3.8 of this standard. 5 Inspection regulations
5.1 Factory inspection
5.1.1 Each single-unit printing press shall be inspected according to the provisions of Articles 3.7.1a, 3.7.1g, 3.7.2a, 3.7.2c, 3.9~3.12, and 4.1 of this standard: Each multi-unit printing press shall be inspected according to the provisions of Articles 3.7.1c, 3.7.1g, 3.9~3.12, 4.1, and 4.3.2.6. 5.1.2 For all inspection items, if one offset printing machine fails in the inspection, it will be considered as a defective product; for random inspection items, if one offset printing machine fails, two more offset printing machines will be inspected for that item. If two offset printing machines fail, the whole batch will be inspected for that item. 5.1.3 Each offset printing machine must pass the inspection of the quality inspection department of the manufacturing plant before it is allowed to leave the factory. 5.2 Type inspection
When any of the following situations occurs, one offset printing machine shall be selected from the first or first batch or one offset printing machine from the production batch according to the provisions of Chapter 3 of this standard (except 3.7.1a, 3.7.1c, 3.7.2a), and the trial type inspection of new products and old products transferred to the factory for production: a. After formal production, if there are major changes in materials, processes, and structures; c. When the offset printing machine is stopped for more than one year and resumes production; d. In continuous production, routine inspections shall be carried out at least once a year, etc. 6 Marking, packaging and storage
6.1 Each offset printing machine shall be fixed with a nameplate in an obvious position, and its requirements shall be in accordance with the provisions of JB8: the content shall include the name and model of the offset printing machine, main technical specifications, factory number, factory date, manufacturer name, etc. 6.2 The offset printing machine shall be wiped clean before packaging, and the exposed processing surface shall be coated with rust inhibitor. 6.3 The packaging box of the offset printing machine should be covered with waterproof material and should be securely fixed in the box. The accessory box and spare parts box should be fixed in the gap in the main box and firmly tightened. The box should meet the requirements of transportation and loading. 6.4 The outer wall of the packaging box should be marked with the manufacturer's name, consignee and address, offset printing machine model, packaging box serial number, packing date, volume, weight, center of gravity, "lifting line" and "upward" "not allowed to be inverted" and other words. The words and names should be clear and neat to ensure that they will not be blurred due to rain erosion and long-term use.
6. 5 Each offset printing machine should be accompanied by the following documents when leaving the factory: Packing list:
Offset printing machine certificate:
Offset printing machine manual.
6.6 After the offset printing machine is packed, it must be delivered to the warehouse for safekeeping. If the storage date exceeds one year, it must be re-sealed. A1 Arrangement of the pattern
The arrangement of the measurement pattern on the printing plate is shown in Figure A1. Overprinting crosshairs or page numbers
Multi-color sets
Seven-character lines
GB3264—89
Appendix A
Test layout
(Supplement)
560 lines/cm 50% and then dot large block screen area x
(Minus text illustration:
A2 Test layout instructions
Imprint force uniformity and solid measurement bar
Front gauge line
Test gauge line
aThe inspection plates are all made with the same format. The 1, 2, and n numbers marked on each pattern in Figure A1 represent the stamping group sequence. b. When testing a single-unit printing press, each stamping group uses a printing plate with the same pattern. The printing cross lines (or page numbers) and the large screen areas (or text, illustrations) marked with 1 to n and the check strip for printing force uniformity and stability marked with 1 should be retained, and the rest should be removed. | |tt||When testing a multi-unit printing press, except for the common overlapping cross lines, only the inspection patterns with corresponding serial numbers are retained on the printing plates of each printing group, and the rest are removed.
B1 Overview
GB3264—89
Appendix B
Data processing method
(Supplement)
When using standard deviation to process data, values exceeding a certain probability are allowed to be eliminated. B2 Elimination method
When the maximum value in the data is greater than the sum of X+3g and the minimum value is less than the difference of X-3, they are all eliminated. After elimination, the standard deviation is recalculated until it cannot be eliminated. The average value X is represented by the code given by various indicators. Additional remarks:
This standard is under the jurisdiction of Beijing Printing Machinery Research Institute. This standard was drafted by Beijing Printing Machinery Research Institute and Beijing People's Machinery General Factory. The drafters of this standard are Zhu Lin and Wang Xikai.4 Noise test
Turn on all noise sources, and measure the noise of the offset printing press with an ordinary sound level meter at the "slow" gear A weighting when the offset printing press is running at the rated maximum printing speed. The microphone is 1.5m above the ground, and the horizontal position of the microphone is shown in the figure below, where point 13 is the maximum noise point for the patrol measurement. When the distance between two measuring points of the measurement track L is less than 2m, measuring points 4, 6, 10, and 12 can be cancelled. Reference outer wheel nose line
Measurement line track penetration
GB 326489
The noise of the offset printing press is calculated by the arithmetic average of the noise at each measuring point, and the test results should comply with the provisions of Article 3.8 of this standard. 5 Inspection Rules
5.1 Factory Inspection
5.1.1 Each single-unit printing press shall be inspected according to the contents specified in 3.7.1a, 3.7.1g, 3.7.2a, 3.7.2c, 3.9~3.12, 4.1, and 4.3.2.6 of this standard; each multi-unit printing press shall be inspected according to the contents specified in 3.7.1c, 3.7.1g, 3.9~3.12, 4.1, and 4.3.2.6 of this standard. One offset printing press shall be selected from each batch to measure the noise.
5.1.2 For the full inspection items, if one offset printing press fails in the inspection, it shall be deemed as a defective product; for the random inspection items, if one fails, two more shall be selected for inspection of the item, and if two fail, the whole batch shall be inspected for the item. 5.1.3 Each offset printing press shall be inspected and qualified by the quality inspection department of the manufacturing plant before it can be shipped out of the factory. 5.2 Type inspection
When any of the following situations occurs, one offset printing machine shall be selected from the first or first batch or one offset printing machine from the production batch according to the provisions of Chapter 3 of this standard (except 3.7.1a, 3.7.1c, 3.7.2a), and the trial type inspection of new products and old products transferred to the factory for production: a. After formal production, if there are major changes in materials, processes, and structures; c. When the offset printing machine is stopped for more than one year and resumes production; d. In continuous production, routine inspections shall be carried out at least once a year, etc. 6 Marking, packaging and storage
6.1 Each offset printing machine shall be fixed with a nameplate in an obvious position, and its requirements shall be in accordance with the provisions of JB8: the content shall include the name and model of the offset printing machine, main technical specifications, factory number, factory date, manufacturer name, etc. 6.2 The offset printing machine shall be wiped clean before packaging, and the exposed processing surface shall be coated with rust inhibitor. 6.3 The packaging box of the offset printing machine should be covered with waterproof material and should be securely fixed in the box. The accessory box and spare parts box should be fixed in the gap in the main box and firmly tightened. The box should meet the requirements of transportation and loading. 6.4 The outer wall of the packaging box should be marked with the manufacturer's name, consignee and address, offset printing machine model, packaging box serial number, packing date, volume, weight, center of gravity, "lifting line" and "upward" "not allowed to be inverted" and other words. The words and names should be clear and neat to ensure that they will not be blurred due to rain erosion and long-term use.
6. 5 Each offset printing machine should be accompanied by the following documents when leaving the factory: Packing list:
Offset printing machine certificate:
Offset printing machine manual.
6.6 After the offset printing machine is packed, it must be delivered to the warehouse for safekeeping. If the storage date exceeds one year, it must be re-sealed. A1 Arrangement of the pattern
The arrangement of the measurement pattern on the printing plate is shown in Figure A1. Overprinting crosshairs or page numbers
Multi-color sets
Seven-character lines
GB3264—89
Appendix A
Test layout
(Supplement)
560 lines/cm 50% and then dot large block screen area x
(Minus text illustration:
A2 Test layout instructions
Imprint force uniformity and solid measurement bar
Front gauge line
Measurement gauge line
aThe inspection plates are all made with the same format. The 1, 2, and n numbers marked on each pattern in Figure A1 represent the stamping group sequence. b. When testing a single-unit printing press, each stamping group uses a printing plate with the same pattern. The printing cross lines (or page numbers) and the large screen areas (or text, illustrations) marked with 1 to n and the check strip for printing force uniformity and stability marked with 1 should be retained, and the rest should be removed. | |tt||When testing a multi-unit printing press, except for the common overlapping cross lines, only the inspection patterns with corresponding serial numbers are retained on the printing plates of each printing group, and the rest are removed.
B1 Overview
GB3264—89
Appendix B
Data processing method
(Supplement)
When using standard deviation to process data, values exceeding a certain probability are allowed to be eliminated. B2 Elimination method
When the maximum value in the data is greater than the sum of X+3g and the minimum value is less than the difference of X-3, they are all eliminated. After elimination, the standard deviation is recalculated until it cannot be eliminated. The average value X is represented by the code given by various indicators. Additional remarks:
This standard is under the jurisdiction of Beijing Printing Machinery Research Institute. This standard was drafted by Beijing Printing Machinery Research Institute and Beijing People's Machinery General Factory. The drafters of this standard are Zhu Lin and Wang Xikai.4 Noise test
Turn on all noise sources, and measure the noise of the offset printing press with an ordinary sound level meter at the "slow" gear A weighting when the offset printing press is running at the rated maximum printing speed. The microphone is 1.5m above the ground, and the horizontal position of the microphone is shown in the figure below, where point 13 is the maximum noise point for the patrol measurement. When the distance between two measuring points of the measurement track L is less than 2m, measuring points 4, 6, 10, and 12 can be cancelled. Reference outer wheel nose line
Measurement line track penetration
GB 326489
The noise of the offset printing press is calculated by the arithmetic average of the noise at each measuring point, and the test results should comply with the provisions of Article 3.8 of this standard. 5 Inspection Rules
5.1 Factory Inspection
5.1.1 Each single-unit printing press shall be inspected according to the contents specified in 3.7.1a, 3.7.1g, 3.7.2a, 3.7.2c, 3.9~3.12, 4.1, and 4.3.2.6 of this standard; each multi-unit printing press shall be inspected according to the contents specified in 3.7.1c, 3.7.1g, 3.9~3.12, 4.1, and 4.3.2.6 of this standard. One offset printing press shall be selected from each batch to measure the noise.
5.1.2 For the full inspection items, if one offset printing press fails in the inspection, it shall be deemed as a defective product; for the random inspection items, if one fails, two more shall be selected for inspection of the item, and if two fail, the whole batch shall be inspected for the item. 5.1.3 Each offset printing press shall be inspected and qualified by the quality inspection department of the manufacturing plant before it can be shipped out of the factory. 5.2 Type inspection
When any of the following situations occurs, one offset printing machine shall be selected from the first or first batch or one offset printing machine from the production batch according to the provisions of Chapter 3 of this standard (except 3.7.1a, 3.7.1c, 3.7.2a), and the trial type inspection of new products and old products transferred to the factory for production: a. After formal production, if there are major changes in materials, processes, and structures; c. When the offset printing machine is stopped for more than one year and resumes production; d. In continuous production, routine inspections shall be carried out at least once a year, etc. 6 Marking, packaging and storage
6.1 Each offset printing machine shall be fixed with a nameplate in an obvious position, and its requirements shall be in accordance with the provisions of JB8: the content shall include the name and model of the offset printing machine, main technical specifications, factory number, factory date, manufacturer name, etc. 6.2 The offset printing machine shall be wiped clean before packaging, and the exposed processing surface shall be coated with rust inhibitor. 6.3 The packaging box of the offset printing machine should be covered with waterproof material and should be securely fixed in the box. The accessory box and spare parts box should be fixed in the gap in the main box and firmly tightened. The box should meet the requirements of transportation and loading. 6.4 The outer wall of the packaging box should be marked with the manufacturer's name, consignee and address, offset printing machine model, packaging box serial number, packing date, volume, weight, center of gravity, "lifting line" and "upward" "not allowed to be inverted" and other words. The words and names should be clear and neat to ensure that they will not be blurred due to rain erosion and long-term use.
6. 5 Each offset printing machine should be accompanied by the following documents when leaving the factory: Packing list:
Offset printing machine certificate:
Offset printing machine manual.
6.6 After the offset printing machine is packed, it must be delivered to the warehouse for safekeeping. If the storage date exceeds one year, it must be re-sealed. A1 Arrangement of the pattern
The arrangement of the measurement pattern on the printing plate is shown in Figure A1. Overprinting crosshairs or page numbers
Multi-color sets
Seven-character lines
GB3264—89
Appendix A
Test layout
(Supplement)
560 lines/cm 50% and then dot large block screen area x
(minus text illustration:
A2 Test layout instructions
Imprint force uniformity and solid measurement bar
Front gauge line
Measurement gauge line
aThe inspection plates are all made with the same format. The 1, 2, and n numbers marked on each pattern in Figure A1 represent the stamping group sequence. b. When testing a single-unit printing press, each stamping group uses a printing plate with the same pattern. The printing cross lines (or page numbers) and the large screen areas (or text, illustrations) marked with 1 to n and the check strip for printing force uniformity and stability marked with 1 should be retained, and the rest should be removed. | |tt||When testing a multi-unit printing press, except for the common overlapping cross lines, only the inspection patterns with corresponding serial numbers are retained on the printing plates of each printing group, and the rest are removed.
B1 Overview
GB3264—89
Appendix B
Data processing method
(Supplement)
When using standard deviation to process data, values exceeding a certain probability are allowed to be eliminated. B2 Elimination method
When the maximum value in the data is greater than the sum of X+3g and the minimum value is less than the difference of X-3, they are all eliminated. After elimination, the standard deviation is recalculated until it cannot be eliminated. The average value X is represented by the code given by various indicators. Additional remarks:
This standard is under the jurisdiction of Beijing Printing Machinery Research Institute. This standard was drafted by Beijing Printing Machinery Research Institute and Beijing People's Machinery General Factory. The drafters of this standard are Zhu Lin and Wang Xikai.Each imprinting group uses a printing plate with the same pattern, on which the printing cross lines (or page numbers) and the large screen areas (or text, illustrations) marked with 1 to n and the check strip for uniformity and stability of printing force marked with 1 should be retained, and the rest should be removed.
When testing a multi-unit printing press, except for the common superimposed cross lines, only the inspection patterns with corresponding serial numbers should be retained on the printing plates of each imprinting group, and the rest should be removed.
B1 Overview
GB3264—89
Appendix B
Data Processing Method
(Supplement)
When the standard deviation is used to process data, the values exceeding a certain probability are allowed to be eliminated. B2 Elimination Method
When the maximum value in the data is greater than the sum of X+3g and the minimum value is less than the difference of X-3, they are all eliminated. After elimination, the standard deviation is recalculated until it cannot be eliminated. The average value X is represented by the code given by various indicators. Additional remarks:
This standard is under the jurisdiction of Beijing Printing Machinery Research Institute. This standard was drafted by Beijing Printing Machinery Research Institute and Beijing People's Machinery General Factory. The drafters of this standard are Zhu Lin and Wang Xikai.Each imprinting group uses a printing plate with the same pattern, on which the printing cross lines (or page numbers) and the large screen areas (or text, illustrations) marked with 1 to n and the check strip for uniformity and stability of printing force marked with 1 should be retained, and the rest should be removed.
When testing a multi-unit printing press, except for the common superimposed cross lines, only the inspection patterns with corresponding serial numbers should be retained on the printing plates of each imprinting group, and the rest should be removed.
B1 Overview
GB3264—89
Appendix B
Data Processing Method
(Supplement)
When the standard deviation is used to process data, the values exceeding a certain probability are allowed to be eliminated. B2 Elimination Method
When the maximum value in the data is greater than the sum of X+3g and the minimum value is less than the difference of X-3, they are all eliminated. After elimination, the standard deviation is recalculated until it cannot be eliminated. The average value X is represented by the code given by various indicators. Additional remarks:
This standard is under the jurisdiction of Beijing Printing Machinery Research Institute. This standard was drafted by Beijing Printing Machinery Research Institute and Beijing People's Machinery General Factory. The drafters of this standard are Zhu Lin and Wang Xikai.
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