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GB/T 45876-2025Imaging materials — Methods for characterization of particles (English PDF)

影像材料颗粒物表征方法

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

June 30, 2025

Implementation date

January 1, 2026

Scope

GB/T 45876-2025 is the English-translated version of 影像材料颗粒物表征方法.

GB/T 45876-2025 is the Chinese national standard covering the silver halide grains in photographic film and the silver behenate in thermal dry film — the sample preparation and the reagents, the imaging by optical, scanning or transmission electron microscopy, the interferences, the measurement of Feret diameter, length and breadth, the classification by shape, and the agglomerates that have to be told from single grains or the size distribution comes out wrong. First edition, under the China Petroleum and Chemical Industry Federation. In force from 1 January 2026. Issued on 30 June 2025, it has been in force since 1 January 2026.

Document preview — GB/T 45876-2025

National Standard of the People's Republic of China

ICS: 37.040.99
Classification: G 81

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

PrefaceIII
1 Scope1
2 Normative references1
3 Terms and Definitions1
4 Overview2
5 Interference2
6 Instruments and Equipment2
7 Reagent2
8 Sample Preparation3
9 Particle imaging by optical, scanning or transmission electron microscopy3
10 Particle Characterization3
11 Test Report4
Appendix A (Informative) Particle Classification, Size Calculation and Shape5

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1: Structure and drafting rules for standardization documents" Drafting.

Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.

This document was proposed by the China Petroleum and Chemical Industry Federation.

This document is under the jurisdiction of the National Technical Committee for Standardization of Photosensitive Materials (SAC/TC102).

This document was drafted by: China Lucky Group Co., Ltd., Lucky Film Co., Ltd., Lucky Medical Technology Co., Ltd., Shanghai Aviation Tian Equipment Manufacturing Factory Co., Ltd.

The main drafters of this document are: Xia Jiangnan, Gao Jianhui, Jiang Ning, Liu Qian, Xiong Shuqiang, Li Wanying, Jiang Xiaoli, Lu Zhikai, and Cheng Xuemei.

Characterization Methods of Particles in Imaging Materials

1 Scope

This paper describes the use of optical microscopy (OM), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) to characterize the silver halide colloids.

Method for characterizing the shape and size of silver halide particles in films and silver behenate particles in direct digital thermal silver salt dry films.

This document applies to the characterization of silver halide particles in silver halide films and silver behenate particles in direct digital thermal silver halide dry films.

2 Normative references

GB/T 6682

3 Terms and Definitions

The following terms and definitions apply to this document.

3.1 Agglomeration

Two or more particles held together by relatively weak adhesive forces (caused by weak chemical bonds or electrostatic surface charges generated by processing or handling) A collection of multiple particles.

3.2 particle

The smallest discrete unit that can be determined in a test method.

NOTE. Nanoparticles are particles with at least one dimension smaller than 100 nm.

3.3 rectangularparticle

Particles that are close to square or rectangular in shape.

3.4 spherical particles

Round particles.

3.5 Feretdiameter Feretdiameter

The distance between two parallel lines of the particle projection outline measured along a certain direction.

3.6 particle length

The maximum length of a particle along a certain direction in the projected image.

3.7 Particlebreadth

The maximum width of a particle along a certain direction in the projected image.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 6682Water for analytical laboratory use - Specification and test methods

Editions of GB/T 45876

Edition	Title	Revision	Status
GB/T 45876-2025	Imaging materials - Methods for characterization of particles	current edition	Current

This page sells the current edition, GB/T 45876-2025. Earlier editions are listed for reference only.

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