Some standard content:
ICS01140
Classification number: A17
Registration number: 21422-2007
Light Industry Standard of the People's Republic of China
QB/T1877-2007
Replaces QB/T1877-1993
Tinplate prints for the packing and decoration2007-05-29Promulgated
National Development and Reform Commission of the People's Republic of China2007-12-01Implementation
This standard is a revision of QB/T1877-1993 "Tinplate prints for the packing and decoration". Compared with QB/T1877-1993, the main changes of this standard are as follows: QB/T1877-2007
modifies the content and form of the standard, supplements the content of terms and classification, adds the color difference of the same printing sheet, 50% dot gain value, dot reproduction requirements and corresponding test methods, revise and improve the physical and chemical indicators such as overprint error, whiteness, glossiness, adhesion, scratch resistance, and cooking resistance, and revise the appearance index measurement requirements, test instruments, overprint error, adhesion and scratch resistance test methods. This standard is proposed by the China Light Industry Federation. This standard is under the jurisdiction of the National Light Industry Packaging Standardization Center. The drafting unit of this standard: Hangzhou COFCO Meite Container Co., Ltd. The main drafters of this standard: Zhu Zhengli, Cheng Bincai, Feng Hui, Tang Min, Tan Zhenya, Zhongwen, Zhang Mingliang. This standard shall replace the light industry standard QB/T1877-1993 "Packaging and decoration tin (chromium) thin steel plate printed products" issued by the former Ministry of Light Industry from the date of implementation.
1 Scope
Packaging and decoration tin (chromium) thin steel plate printed products QB/T1877-2007
This standard specifies the terms, requirements, test methods, inspection rules and markings, packaging, transportation and storage of packaging and decoration tin (chromium) thin steel plate printed products.
This standard applies to lithographically printed tin (chromium) thin steel plate packaging and decoration printed products. Lithographically printed aluminum packaging and decoration printed products can also be implemented as a reference.
2 Normative reference documents
The clauses in the following documents become the clauses of this standard through reference in this standard. For any dated referenced document, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, parties that reach an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For any undated referenced document, the latest version is applicable to this standard. GB/T1720 Determination of adhesion of paint film
GB/T1732 Determination of impact resistance of paint film
GB/T2828.1-2003 Sampling inspection procedure for attributes: Part 1: Sampling plan for batch inspection based on acceptance quality limit (AQL)
GB/T9279 Scratch test for paints and varnishes
GB/T179341-1999 Printing technology Process control for halftone color separation sheets, samples and printed products Part 1: Parameters and test methods
Printing technology Application of printing control strips
GB/T18720
CY/T3-1999
3 Terminology
Color evaluation Lighting and viewing conditions
Printing unit printingbrank
A printing area that can fully reflect all the information of a single product. Each natural printed sheet can have multiple printing units. 32
Slight scratches slightscrape
Scratches on the printed surface that damage the varnish surface but not the printing ink layer. 33
Pre-press proof sheet
Printed product produced by a proofing machine or other methods other than a printing machine. 34
OK print, OK sheet
During the printing production process, a printed product selected as a reference for subsequent printing operations. 35
Film layer
A coating containing a primer, a printing ink layer and a varnish on a tinned (chromium) thin steel sheet substrate. QB/T1877-2007
4Requirements
41Appearance
411The printed surface should be free of obvious dirt spots and creases. 412No more than three slight scratches of 0.3mmx20mm on each printing unit and no more than six slight scratches on each natural printed sheet. 413 The text and lines are clear and complete. The barcode printing shall comply with relevant national regulations. 414 The dots shall be clear and complete, without ghosting or deformation. 415 The color of the first batch of products is basically consistent with the pre-press sample, and the color of the subsequent batches of products is basically consistent with the printing sample. 42 The color difference of solid printing
The color difference requirements of solid printing are shown in Table 1.
Color difference of the same color in the same batch
Color difference of the same color on the same sheet
43 Dot printing
CIEL*a*b*
CIEL*a*b*
5% of the dots are not lost, and 95% of the dots are not merged. 50% dot increase value ≤25%. 44 Overprint error
The image position error of any two color plates is ≤02mm. 45 Glossiness
Glossiness ≥80°
Note: For products using special effect varnishes such as matte oil, matte oil, wrinkle oil, etc., the glossiness index is not subject to this requirement. 46 Whiteness
The whiteness value of printed products using the white printing process is ≥50%, and the whiteness value of printed products using the white coating process is ≥70%. 47 Impact resistance of paint film
After being impacted by a 300mm high and 1kg mass free fall, the paint film does not crack at the impact point. 48 Processing resistance of paint film
The processing resistance is shown in Table 2.
Table 2 Processing resistance requirements
Test item Date
Stretching method
Trampling method
Crimping method
Heating method
49 Paint film adhesion
Indicator value
The paint film does not fall off after stretching (products without stretching process do not have this requirement)The paint film does not fall off after trampling (products without trampling process do not have this requirement)The paint film does not fall off after curling (products without curling process do not have this requirement)≤50
The paint film does not bubble, warp or crack after heating (products without heating process do not have this requirement)The degree of paint film shedding after being torn by tape is not lower than Grade II, 410 Paint film scratch resistance
When the base code mass is added to 600g, the paint film is not scratched by the needle to the substrate layer. 411 Retort resistance
After retort, the paint film shall not fade, bleed, fall off, wrinkle, or lose gloss significantly. 2
Note: This requirement does not apply to printed materials on tinned (chrome) steel sheets that do not require retort sterilization. 5 Test method
51 Test conditions
511 Temperature/(23±2)℃, relative humidity (60±10)%. 512 Light source shall comply with the provisions of CY/T3-1999. 513 The sample shall be placed in the test room at room temperature for 4 hours before testing. See Figure 1 for the test sampling method.
QB/T1877-2007
2-Test the processing resistance of the paint film (according to specific requirements); 3-Test the adhesion of the paint film (100mm×50mm) 1-Test the impact resistance of the paint film (50mmx50mm) 4-Test the scratch resistance of the paint film (125mmx50mm), 5-Test the boiling resistance of the paint film (50mmx50mm) Figure 1 Sample sampling method
52 Appearance index determination
521 Sample
Place the sample under the light source specified in 5.12. 522 Dot observationwwW.bzxz.Net
Observe with a 25x magnifying glass, and the observation conditions shall be in accordance with the provisions of CY/T3-1999. 53 Field requirements determination
531 Instrument
Colorimeter, the measurement field is 2°, and the light source is the D65 standard light source. 532Test steps
QB/T1877—2007
After the instrument is calibrated, first measure the L*a*b* value of a certain part of the standard sample in the CIEL*a*b* uniform color space and use it as a reference, then measure the color difference of the same color and the same part of the sample and the same color on the same sheet between the sample and the standard. 5.4 Determination of dot requirements
541 Instrument
Colorimeter, measuring field of view is 2°, light source is D6s standard light source. 542 Test steps
Copy the quality inspection and control strips with a width of 3mm×3mm or more and 70 lines/cm (175 lines/inch) to each color separation film or directly expose the plate to the printing plate. The control strips shall comply with the provisions of GB/T18720. The dot percentage P1% at 50% of the dots on the test film or control strips. After the plate is exposed and printed into a finished product, the dot percentage P2% at 50% of the dots on the signal strip on the test product. △P%=P2%-P1% is the 50% dot increase value.
55 Determination of overprint error
551 Instrument
25 times scale magnifier, accuracy is 0.01mm. 552Test steps
Take a printed sample. The sample surface must be clean and flat. Under the 512 light source, measure the image position error of 3 different points of any two color plates on the sample and take the average value. 56Gloss measurement
561Instrument
Gloss meter, using D65 standard light source, 60° incident angle. 562Test steps
Cut a 50mmx50mm printed sample. The sample surface must be clean and flat. After the instrument is calibrated, test the gloss values of 5 different points on the sample and take the average value.
57Whiteness measurement
571Instrument
Colorimeter.
572Test steps
Cut a 50mmx50mm printed sample with white printing or white coating. The sample surface must be clean and flat. After the instrument is calibrated, test the whiteness values of 5 different points on the sample and take the average value. 58 Determination of impact resistance of paint film
581 Instrument
QJC paint film impactor.
582 Test steps
Cut a 50mmx50mm printed sample. The surface of the sample must be clean and flat. Place the sample close to the concave hole of the impact pillow with the printed surface facing down. Lift the hammer (1kg) to the corresponding height and let it fall freely. Use a 4x magnifying glass to observe the changes in the paint film cracks at the impacted part of the sample. Note: If the substrate is broken, the test result is invalid. 59 Determination of processability of paint film
See Table 3 for the test steps.
510 Determination of adhesion of paint film
5101 Instrument
Adhesion tester, adhesive tape.
5102Test steps
QB/T1877—2007
Check that the needle tip has no obvious wear and dirt, cut a 100mmx50mm printed sample, and draw a circular line that exposes the substrate layer according to the method specified in GB/T1720, stick the tape on the circular line, press it with the index finger, and leave 15mm~20mm of tape for holding. Quickly tear off the adhesive tape from the coating according to the direction of Figure 2. Table 3 Processing resistance test
Test name
Stretching method
Flattening method
Crimping method
Heating method
5103 Rating method
Test method
Visually identify after punching into a square specimen with a diagonal of 120mm, R8mm, and a depth of 12mm or a cylindrical specimen with a diameter of 60mm and a depth of 20mm
Visually identify after flattening the interface with a length of 100mm Visually identify after curling the inside and outside edges of a simple specimen with a diameter of 60mm~70mm Put a 50mm×50mm sample into an oven, heat it to 70℃, keep it warm for 5 minutes, then take it out and naturally cool it to room temperature and visually identify
15-20mmm
Figure 2 Schematic diagram of tape tearing
Observe the degree of tearing off the coating film in the circle and evaluate the adhesion. The rating method is shown in Table 4. Table 4 Adhesion rating
Adhesion level
511 Determination of paint film adhesion
5111 Instrument
Scratch tester.
5111 Test steps
Area of film torn off in the circle (average of 3 test samples) 0
Check that the scratch needle tip should have no obvious abrasions and no dirt. Cut a 125mm×50mm printed sample with the printed surface facing up. Adjust the code weight of the scratch tester to 600g, start the machine and make it scratch at a constant speed twice on different parts of 3 sheets, and observe whether the paint film is scratched and the bottom is exposed. The 3 sheets are qualified if they are not scratched and the bottom is not exposed each time. 512 Determination of resistance to boiling
Test steps Cut 12 pieces of 50mmx50mm test pieces of printed samples, each 2 pieces as a group, and fold each group of test pieces 180° once at 2 different positions, with the ink layers overlapped, take 3 groups of samples and place them in the steaming water, and the other 3 groups on the water surface. Sealed and heated to 121℃, kept constant temperature for 30 minutes, and then naturally cooled to room temperature, take out the test pieces and observe the changes in the ink layer. Note: If only one test in water or on the water surface is carried out, only 6 test pieces are taken. 5
QB/T1877-2007
6 Inspection rules
61 Inspection classification,
611 Product inspection is divided into factory inspection and type inspection. 612 Factory inspection is the final inspection of formally produced products before they are delivered to users. 613 Type inspection is a comprehensive assessment of product quality, that is, all requirements specified in the standard are inspected. Products should be subject to type inspection in any of the following situations.
a) Trial type identification of new products or old products transferred to the factory for production; b) After formal production, if there are major changes in structure, materials, and processes that may affect product performance; c) During normal production, periodic inspection should be carried out regularly or after accumulating a certain amount of output; d) When the product is discontinued for more than one year and production is resumed; e) When the results of the export inspection are significantly different from those of the last type inspection; f) When the national quality supervision agency proposes a type inspection requirement. 62 Inspection items
See Table 5 for inspection items.
Table 5 Inspection items
Item name
Factory inspection
Type inspection
63 Batching rules and sampling plan
41~412
41~412
Test method
52~512
52~512
An inspection batch can consist of one production batch, or several production batches that meet the following conditions: these batches are manufactured under basically the same materials, processes, equipment and other conditions. 632 Product quality shall be in accordance with the requirements and test methods specified in this standard, and the sampling plan shall be in accordance with the normal inspection single sampling plan of GB/T2828 (batch inspection counting sampling procedure and sampling table), and the inspection level shall be S-2. 633 Acceptance quality limit of Class B unqualified AQL=65, Class C unqualified AQL=10. 64 Judgment rules and re-inspection rules
641 See Table 6 for the judgment rules.
Table 6 Judgment rules
Project name
Field requirements
Dot requirements
Overprint error
Glossiness
Paint film impact resistance
Paint film processing resistance
Paint film adhesion
Paint film scratch resistance
Paint film boiling resistance
Technical requirements
Test method
Unqualified classification
Batch size
1201~35000
1201~35000
1201~35000
1201~35000
120135000
120135000
1201~35000
1201~35000
1201~35000
1201~35000
Sample size
Judgment array Ac
QB/T1877-2007
642 When the sampling fails, it is allowed to remove the unqualified products and re-inspect. The sampling method and acceptance quality limit remain unchanged. 7 Marking, packaging, transportation, purchase and storage
71 Marking
Each package should be affixed with a qualified inspection label, indicating the user unit, product name, variety and specification, quantity, factory date, product grade, manufacturer name, inspector code, etc. 7.2 Packaging
According to the product conditions and contract requirements, the products should be tied firmly. 73 Purchase and storage
The products should be loaded and unloaded gently during transportation, and should be protected from moisture, sun exposure, rain, heavy pressure, inversion, and corrosive gases and liquids. 74 Purchase and storage
The storage environment should be dry, ventilated, and sun-proof, and the products should be placed individually. They should not be stored in the same room with corrosive substances. Under the above storage conditions, the shelf life is three months (from the date of leaving the factory). Special products or special requirements shall be in accordance with the provisions of the order contract between the user and the manufacturer. 7
People's Republic of China
Light Industry Standard
Packaging and Decoration Tinned (Chromium) Thin Steel Sheet Printing QB/T1877-2007
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