GB/T 8987-2008 English PDF

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GB/T 8987-2008: Micrographics -- Test target for checking optical density of negative micro-image in microfilming
Status: Valid

GB/T 8987: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 8987-2008	139	Add to Cart	3 days	Micrographics -- Test target for checking optical density of negative micro-image in microfilming	Valid
GB/T 8987-1988	199	Add to Cart	2 days	Micrographics--Test target of optical density measurement for microfilming negative	Obsolete

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Basic data

Standard ID: GB/T 8987-2008 (GB/T8987-2008)
Description (Translated English): Micrographics -- Test target for checking optical density of negative micro-image in microfilming
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: A14
Classification of International Standard: 37.080
Word Count Estimation: 6,629
Date of Issue: 2008-07-16
Date of Implementation: 2009-01-01
Older Standard (superseded by this standard): GB/T 8987-1988
Regulation (derived from): Announcement of Newly Approved National Standards No. 12 of 2008 (No. 125 overall)
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the inspection microfilming negative optical density of the test target and method of use. This standard applies to 16 mm microfilm cameras and flatbed A6 microfiche microfilm camera microfilming. This standard does not apply to rotary microfilm camera and COM logger.

GB/T 8987-2008: Micrographics -- Test target for checking optical density of negative micro-image in microfilming

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Micrographics. Test target for checking optical density of negative microimages in microfilming ICS 37.080 A14 National Standards of People's Republic of China Replacing GB/T 8987-1988 When Micrographics Micrographics Check the negative image of the optical density of the Test target Posted 2008-07-16 2009-01-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard replaces GB/T 8987-1988 "check Micrographics Micrographics negative image optical density Test target." This standard and GB/T 8987-1988 compared to major technological changes as follows. --- Increased shall GB/T 12356-2008 "Micrographics 16mm microfilm camera platform with a special test target Sign and use the "shooting a frame of another explanation; --- Amend the provisions of this standard method of using standard plate instructions. This Standard Document Imaging Technology by the National Standardization Technical Committee (SAC/TC86) and focal points. This standard was drafted. National Information Technology Standardization Technical Committee branch of a document image, the Beijing Film Machinery Research Institute. The main drafters of this standard. Bai Yulong, Wei, Li Ming. This standard replaces the standards previously issued as follows. --- GB/T 8987-1988. When Micrographics Micrographics Check the negative image of the optical density of the Test target

1 Scope

This standard specifies the test target and method of use to check microfilming negative images with optical density. This standard applies to 16mm microfilm camera platform A6 microfiche and microfilm camera microfilming. This standard does not apply to Rotary COM microfilm camera and recorder.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB/T 6159.1-2003 Micrographics - Vocabulary - Part 1. General terms (ISO 6196-1.1993, MOD) GB/T 6159.6-2003 Micrographics - Vocabulary - Part 6. Equipment (ISO 6196-6.1993, MOD) GB/T 6159.7-2000 Micrographics - Vocabulary Part VII. Computer Micrographics (eqv6196-7.1992) GB/T 6159.8-2003 Micrographics - Vocabulary - Part 8. Application (ISO 6196-8.1998, MOD) GB/T 12356-2008 Micrographics 16mm microfilm camera platform Test target characteristics and use

3 Terms and Definitions

GB/T 6159.1-2003, GB/T 6159.6-2003, GB/T 6159.7-2000 and GB/T 6159.8-2003 established The terms and definitions apply to this standard. 4 A4 format density test target 4.1 General A4 format density test target format for the A6 by four gray area and a shrinkage scale test configuration, the layout shown in Figure 1. 4.2 gray zone Four A6 format of the gray zone should have the following respective reflectance or optical density. --- A gray zone of reflectivity of R457 = 80% + 5%, equivalent to the density of the diffuse reflection D457 = 0.071 ~ 0.097; --- A gray zone of reflectivity of R457 = 6% ± 0.4%, equivalent to the density of the diffuse reflection D457 = 1.194 ~ 1.252; --- Two remaining gray regions reflectivity of R457 = 50% ± 3%, the diffuse reflectance density is equivalent to D457 = 0.276 ~ 0.328. NOTE. R457 and D457 shows measured reflectance or diffuse reflection density, color filter used for the wavelength of the light passing through the center of 457nm, measured as A light source. 4.3 feet shrinkage test Shrinkage test foot width should be (10 ± 1) mm, the length shall be (100 ± 1) mm, and press mm divided scale. 4.4 standard board size A4 format density test target dimensions shall be 297mm × 210mm. ......

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