This standard specifies the quality requirements for first-generation silver-gelatin microforms. This standard applies to first-generation silver-gelatin negative microforms with low, medium and high reduction ratios. It does not apply to microforms with very high reduction ratios, color microforms and COM microforms. GB/T 17292-1998 Quality requirements for first-generation silver-gelatin microforms using microfilm technology GB/T17292-1998 Standard download decompression password: www.bzxz.net
This standard specifies the quality requirements for first-generation silver-gelatin microforms. This standard applies to first-generation silver-gelatin negative microforms with low, medium and high reduction ratios. It does not apply to microforms with very high reduction ratios, color microforms and COM microforms.

GB/T17292—1998
This standard sets forth requirements for the readability, integrity, preservation and credential quality of microforms, which are consistent with the requirements of the relevant international standards and national standards that have been published. Appendix A of this standard is a suggestive appendix.
This standard is proposed by the National Technical Committee for the Promotion of Microfilm Technology Standardization. This standard is under the jurisdiction of the National Technical Committee for the Promotion of Microfilm Technology Standardization. This standard was drafted by the Fourth Branch of the National Technical Committee for the Promotion of Microfilm Technology Standardization. The main drafters of this standard are Geng Zhidong, Liu Peiping, Liu Tuhua, Xiao Jianping and Yang Zhengang. 1 Scope
National Standard of the People's Republic of China
Micrographics
Quality requirements for the first generation silver-gelatin microforms Micrographics Require on the quality of the first generation silver-gelatin microforms This standard specifies the quality requirements for the first generation silver-gelatin microforms. GH/T 17292---1998
This standard applies to the first generation of silver gelatin negative microforms with low, high and low reduction ratios. It does not apply to ultra-high reduction ratio microforms, color microforms and COM microforms.
2 References
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. At the time of publication of this standard, the versions shown are valid: all existing standards will be revised, and all parties using this standard should explore the possibility of using the latest version of the following standards. GB6159.1-85 Microfilm Vocabulary Part 1: Terms GB/T6160-1995 Microfilm Density of the first generation of silver-gelatin microfilm GB/T 6161-94 Characteristics of test chart No. 2 of microfilm and its application in microfilm GB7516-87 Graphic symbols of microfilm GB7517-87 Microfilm Regulation for photographing thread-bound ancient books on 16 mm roll GB 7518-87 Microfilm Regulation for photographing thread-bound ancient books on 35 mm roll 1 GB GB/T 7519-87 Microfilming - Determination of thiosulfate residues in microfilm after processing - Methyl blue photometric method GB88788 Microfilming - Inspection of negative optical density in microfilms - Old test plate GB/T 8989-1998 Microfilming - Technical drawings and technical documents - Quality standards and inspection of microfilms (B8990-88 Microfilming - Technical drawings for microfilming - Quality test plate for microfilming - Grey plate for inspection of microfilming - Specular grey plate GB/T 12333-90 Microfilming - Connection of image-bearing microfilms GB/T 115021-94 Microfilming - 35 mm roll film - Specification of technical drawings and technical documents CB/T 15737-1995 Microfilming - Processing and storage of silver-gelatin microfilm ISO 446:1991 Microfilming - ISO 1446:1991 Test chart No. 1 - Characteristics and application IS6196-2:1993 Microfilming technology - Synonyms - Part 2 - Image layout and recording methods IS61965:1987 Microfilming technology vocabulary: Part 5 Image quality, clarity and inspection IS06199:1991 Microfilming technology - Procedure for filming documents on 16 mm and 35 mm silver-gelatin microfilm IS010550:1JJ4 Microfilming technology - Test standard for checking the performance of flat-bed microfilm cameras 3 Basic requirements for microfilm quality
Microforms must have good readability. According to the production date and function of different microforms, they should also meet the requirements of integrity, authenticity and authenticity. The standard single reason
4 Readability items and requirements
GB/T 17292-1998
Readability refers to the degree to which the image information recorded in the microform can be recognized with the help of reading equipment. 4.1 Background density
The background density should be measured in the area of ​​the microfilm image of the original to be photographed, without handwriting, lines, graphics, wrinkles and shadows. The measured area should be the diameter of the detection hole of the micrometer, and the background density value should comply with the provisions of GB/T6160. 4.2 Gray card image density
The gray card used should comply with the provisions of GB8990 or GR8987. The negative image density of the gray card with a reflectivity of 50±3.0% should be controlled between 1.0 and 1.2: the negative image density of the gray card with a reflectivity of 6±0.4% shall not be higher than 0.16
4.3 Density of film base plus gray fog
The area where the film is not exposed to light must be selected for detection. The density of gray fog shall not exceed 0.164.4 The difference in tidal density of the same background
is generally selected for inspection and comparison with the four corners and the center of the background image. If there is a significant difference in the density of the same background, the area with the highest and lowest background tidal density should be selected for inspection and comparison.
The background density of the same frame should not be greater than 0.40. 4. 5 The background density difference of the same film
Generally, the frame with the highest background density and the frame with the lowest background density in the same film are selected for detection and comparison. For the images of the originals on the special carriers, the frames are not tested and compared. The background density difference of the same film should not be greater than 0.40. 4.6 Edge fog
If the density of the film edge exposure area is higher than the fog density of the film base of the original film, it is considered that the film has produced edge fog.
There should be no edge fog in the label space area, search symbol (digital) area, and flat film header area. 4.7 Film light leakage
Light leakage is strictly prohibited in the image area of ​​the microform. The light leakage area of ​​the front and rear guards must be more than 20cm away from the starting and ending frames. Light leakage is strictly prohibited on microfilm.
4.8 Overall resolution
The overall resolution shall be measured by the test plate and method specified in ISO10550. Test chart No. 2 shall comply with the provisions of GB/T6161. The overall resolution shall not be less than the requirements of Table 1. 4.9 Clarity
The clarity shall be measured by the test plate and method specified in ISO10550. Test chart No. 1 shall comply with the provisions of IS0446. The clarity shall not be less than the requirements of Table 1.
4. 10 Fingerprints
The microforms must be kept clean and free of any fingerprints. 4.11 Watermarks
The surface of the microforms shall not contain watermarks that may affect the reading, restoration, copying and preservation of the microforms. 4.12 Film stains
Microforms are strictly prohibited from showing any stains
Nominal reduction ratio
1 t 48
4.13 Film folding
GB/T17292—1998
Requirements for clarity and resolution of the first generation of microforms Reduction ratio range
Microforms are strictly prohibited from showing film folds, 4.14 Film deformation
Less than
1 : 20
1 : 28
1 : 52
Test No. 1
Microforms shall not have any curling, distortion, unevenness or deformation that may affect the clarity or resolution of the copy. 4.15 Microforms shall not have any curling that may affect the clarity of copying and reading. The degree of curling of the roll film shall be determined based on the curling template provided by different reading devices to determine whether it is qualified. 4.16 Reticulation
When observed under the reading device, the microfilm image area shall not have any scaly reticulation of the emulsion layer. 4.17 Static Marking
Microforms shall not have any static markings.
4.18 Overlapping
Microforms shall not have any frames with incense.
4.19 Stripes
Microforms shall not have any stripes that are not inherent to the original. 4.20 Back-transparent imprint
The influence of back-transparent imprint of thin paper original on the information of the stop surface should be avoided. 4.21 Light spot and foreign body shadow
Test cabinet No. 2
The microfilm should not contain uneven image density caused by the surface light loss of the original or the strong reflected light of the manuscript glass and the projection of foreign objects.
4.22 Image distortion
Image distortion on the film should be avoided. The length difference between two equal line segments in any direction in the original should not be greater than 0.5%. When shooting book-type originals, there should be no deformation of the seam image. 4.23 Image arrangement
The order of arrangement of microfilm images should be consistent with the original and should meet the requirements of 5.2.2 of IS06199:1991. 4.24 Reduction ratio selection
GB/T 172921998
One microfilm should be shot with the same reduction ratio or several fixed reduction ratios, and the corresponding reduction ratios should be marked. 4.25 Virtual image
Virtual images caused by the original being out of the recording depth range, focus deviation, movement of the original being shot during exposure, and vibration of the microfilm camera are strictly prohibited.
4.26 Image shrinkage and stretching
The longitudinal and lateral shrinkage ratios of the film images shot by the rotary machine should be consistent. There should be no image compression or stretching distortion. 4.27 Image position
The image should be centered or fixed in the picture, and should not fluctuate up and down or tilt. 5 Completeness items and requirements
Integrity refers to the degree to which the microform reproduces the original appearance of the photographed original. 5.1 Missed shots
The microform of the plate (sheet) should not have missed expansion of the original. For missed microforms, reshoot or supplementary shooting measures should be taken. 5.2 Incomplete image information
The image information of each frame should be complete, and the original characters, lines, prints, and graphics should be fully photographed. The four sides of the photographed original should be visible within the frame. The photographed original should not be folded or wrinkled. Foreign objects are strictly prohibited from blocking the image area of ​​the frame. The general shooting of the original should refer to the requirements of 6.5 of GB/T15021-94. The shooting of the original with the label should refer to the requirements of 8.6 of GB7517-87. 5.3 Image scratches
Scratches that are directly visible to the naked eye are strictly prohibited in the film frame area. 5.4 Film adhesion
Microforms are strictly prohibited from having adhesion.
5.5 Film damage
Microforms are strictly prohibited from having damage.
5.6 Emulsion film shedding
Microforms are strictly prohibited from having emulsion film shedding. 5.7 Cracking
Microforms are strictly prohibited from having emulsion layer cracking. 5.8 Header and tail
The head and tail of the reel film should each have an empty leader (guard) of no less than 700mm. 5.9 Pre-text labeling area
The graphic symbol plates, technical labels, annual label plates, identification labels and catalog label plates in the front and back labeling areas of the main text should be complete and standardized. 5.10 Graphic symbols
According to the specific defects or expansion of the originals, appropriate graphic symbols should be added. The style and use of graphic symbols should comply with the provisions of GB7516. 5.11 Search marks
Automatic or manual search marks should be set according to the search requirements of microforms. Search marks should be complete and accurate, and can be consistent with the number of the original or microform number.
The position, size and density of automatic search marks should comply with the relevant regulations of the search equipment used. 5.12 Frame spacing
6 Preservation items and requirements
GB/T17292--1998
Preservation refers to the quality evaluation of the length of time that microforms can be preserved. 6.1 Thiosulfate pad residue
The thiosulfate residue of the film should be checked by the method of GB 7519. For long-term and permanent preservation, the fixing and washing of microfilm should be sufficient, and the thiosulfate residue must be less than 1.4% c. 6.2 Negative spots
Microforms are strictly prohibited from containing various color spots.
Microforms should not show traces of film staining selected by anti-halation dyes. 6.3 Foreign matter on film
The surface of the film should not have any attached matter: It is strictly prohibited to have attached foreign matter that is easy to scratch the film or has an impact on the reading and copying of the film: 6.4 Chemical pollution
Microforms are strictly prohibited from being contaminated by various chemical substances. Thinning or thickening drugs shall not be used to treat microforms: 6.5 Mold spots
Microforms are strictly prohibited from having mold spots.
6.6 Dry thoroughly
The microfilm must be dried thoroughly after being developed.
7 Evidence items and requirements
Evidence refers to the degree to which the microfilm retains the authenticity of the photographed original and the basis for verifying the authenticity of the microfilm. 7.1 Evidence plate
The evidence plate of the microfilm should be complete, intact and standardized. 7.2 Reshoot
The roll film and flat film with incorrect shooting should generally be reshot as a whole. If the non-critical images of the microfilm are shot incorrectly and the amount of reshoot is very small, the reshoot splicing method should be adopted. The image of the reshoot splicing part should have the same shrinkage rate and density as the dry-shot image. The "Reshooting Instructions" should be shot in the reshoot section. 7.3 Splicing
Microfilms should avoid splicing. When reshoot splicing is necessary, the splicing quality should comply with the provisions of GB/T12355. 7.4 Reduction ratio deviation
Microfilms should avoid deviations between the actual reduction ratio and the nominal reduction ratio. This deviation should be between the imager and the imager. 7.5 Sequence
Microfilms should be photographed in the order of the pages of the originals, and the page sequence should not be reversed. If the number of the photographed original is incorrect, a graphic symbol of "wrong number" should be printed at the same time.
7.6 Misfoldingwww.bzxz.net
The microfilm frame should not show any images that were mistakenly photographed. If a key frame is mistakenly photographed or the mistaken information seriously violates the original intention of the photographed original, the film must be re-photographed. CB/T 17292: 1998
Appendix A
(Suggestive Appendix)
Explanation of the strictness of the quality requirements for microfilms The following explanations are given for the strictness of the quality requirements for microfilms in the standard text: 1. Words indicating that the requirements are very strict and must be met, otherwise the product will be unqualified. The positive description uses "must";
The negative description uses "strictly prohibited"
2. Words indicating that the requirements are strict and must be met under normal circumstances, otherwise the product will be defective. Positive descriptions use "should", negative descriptions use "should not" and "must not". 3. Words that indicate that a slight choice is allowed and that the standard requirements should be achieved under the conditions permitted, otherwise the quality is not the best. Positive descriptions use "should", negative descriptions use "should not".1. Voucher plate
The voucher plate of microfilm should be complete, intact and standardized. 7.2. Re-shoot
The roll film and flat film with incorrect shooting should be re-shot as a whole. If the non-critical images of the microfilm are shot incorrectly and the amount of re-shooting is very small, the re-shooting splicing method should be adopted. The image of the re-shooting splicing part should have the same shrinkage and density as the dry-shooting image. The "re-shooting instructions" should be shot in the re-shooting section of the film. 7.3. Splicing
Microfilms should avoid splicing. When re-shooting splicing is necessary, the splicing quality should comply with the provisions of GB/T12355. 7.4. Shrinkage deviation
The deviation between the actual shooting shrinkage and the nominal shrinkage should be avoided. The deviation should be between the detector and the detector. 7.5. Sequence
Microfilms should be shot in the page sequence of the original, and the page sequence should not be reversed. If the number of the photographed original is incorrect, a graphic symbol of "wrong number" should be printed at the same time.
7.6 Misfolding
The microfilm frame should not show any images that were mistakenly photographed. If a key frame is mistakenly photographed or the mistaken information seriously violates the original intention of the photographed original, the film must be re-photographed. CB/T 17292: 1998
Appendix A
(Suggestive Appendix)
Explanation of the strictness of the quality requirements for microfilms The following explanations are given for the strictness of the quality requirements for microfilms in the standard text: 1. Words indicating that the requirements are very strict and must be met, otherwise the product will be unqualified. The positive description uses "must";
The negative description uses "strictly prohibited"
2. Words indicating that the requirements are strict and must be met under normal circumstances, otherwise the product will be defective. Positive descriptions use "should", negative descriptions use "should not" and "must not". 3. Words that indicate that a slight choice is allowed and that the standard requirements should be achieved under the conditions permitted, otherwise the quality is not the best. Positive descriptions use "should", negative descriptions use "should not".1. Voucher plate
The voucher plate of microfilm should be complete, intact and standardized. 7.2. Re-shoot
The roll film and flat film with incorrect shooting should be re-shot as a whole. If the non-critical images of the microfilm are shot incorrectly and the amount of re-shooting is very small, the re-shooting splicing method should be adopted. The image of the re-shooting splicing part should have the same shrinkage and density as the dry-shooting image. The "re-shooting instructions" should be shot in the re-shooting section of the film. 7.3. Splicing
Microfilms should avoid splicing. When re-shooting splicing is necessary, the splicing quality should comply with the provisions of GB/T12355. 7.4. Shrinkage deviation
The deviation between the actual shooting shrinkage and the nominal shrinkage should be avoided. The deviation should be between the detector and the detector. 7.5. Sequence
Microfilms should be shot in the page sequence of the original, and the page sequence should not be reversed. If the number of the photographed original is incorrect, a graphic symbol of "wrong number" should be printed at the same time.
7.6 Misfolding
The microfilm frame should not show any images that were mistakenly photographed. If a key frame is mistakenly photographed or the mistaken information seriously violates the original intention of the photographed original, the film must be re-photographed. CB/T 17292: 1998
Appendix A
(Suggestive Appendix)
Explanation of the strictness of the quality requirements for microfilms The following explanations are given for the strictness of the quality requirements for microfilms in the standard text: 1. Words indicating that the requirements are very strict and must be met, otherwise the product will be unqualified. The positive description uses "must";
The negative description uses "strictly prohibited"
2. Words indicating that the requirements are strict and must be met under normal circumstances, otherwise the product will be defective. Positive descriptions use "should", negative descriptions use "should not" and "must not". 3. Words that indicate that a slight choice is allowed and that the standard requirements should be achieved under the conditions permitted, otherwise the quality is not the best. Positive descriptions use "should", negative descriptions use "should not".
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