GB/T 8990-1988
Micrographics--Reflectance test target used in the test target for inspecting the quality of micrography of technical drawing (English Version)

Standard No.

GB/T 8990-1988

Language

Chinese, Available in English version

Release Date

1988

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Status

Be replaced 2007-02

Replace By

GB/T 17739.2-2006

Latest

GB/T 17739.2-2021

Scope

The reflectance gray plate specified in this standard is an integral part of the "micrographic quality test target plate for inspection technical drawings", which is used to test the diffuse transmission visual density of silver salt microfilm. Albedo Gray Slate is limited to shooting with reflected light.

GB/T 8990-1988 history

• 2021 GB/T 17739.2-2021 Microfilming of technical drawings and other drawing office documents—Part 2：Quality criteria and control of 35mm silver gelatin microfilms
• 2006 GB/T 17739.2-2006 Microfilming of technical drawings and technical documents. Part 2: Quality criteria and control of 35mm silver gelatin microfilms
• 1988 GB/T 8990-1988 Micrographics--Reflectance test target used in the test target for inspecting the quality of micrography of technical drawing

GB/T 8990-1988 Micrographics--Reflectance test target used in the test target for inspecting the quality of micrography of technical drawing was changed to GB/T 17739.2-2006 Microfilming of technical drawings and technical documents. Part 2: Quality criteria and control of 35mm silver gelatin microfilms.