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GA/T 2004-2022 PDF English

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GA/T 2004-2022: Forensic sciences - Technical specifications for latent fingerprint development by oil red O
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GA/T 2004-2022English129 Add to Cart 3 days [Need to translate] Forensic sciences - Technical specifications for latent fingerprint development by oil red O

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Basic data

Standard ID GA/T 2004-2022 (GA/T2004-2022)
Description (Translated English) Forensic sciences - Technical specifications for latent fingerprint development by oil red O
Sector / Industry Public Security (Police) Industry Standard (Recommended)
Classification of Chinese Standard A92
Classification of International Standard 13.310
Word Count Estimation 5,552
Date of Issue 2022-09-16
Date of Implementation 2023-01-01
Issuing agency(ies) Ministry of Public Security
Summary This standard specifies the principle of oil red O fingerprint technology, and specifies the applicable objects, equipment, reagents, laboratory environment requirements, operation steps and precautions of oil red O fingerprint technology. This standard is applicable to the appearance of oily fingerprints on objects, especially fingerprints on wet and water-immersed objects.

GA/T 2004-2022: Forensic sciences - Technical specifications for latent fingerprint development by oil red O




---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.
ICS 13.310 CCSA92 People's Republic of China Public Security Industry Standards Forensic Science Oil Red O Reveals Handprint Technical Specifications 2023-01-01 Implementation Released by the Ministry of Public Security of the People's Republic of China

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 contents of this document may refer to patents. The issuing agency of this document assumes no responsibility for identifying patents. This document was proposed by the Fingerprint Inspection Sub-Technical Committee of the National Criminal Technology Standardization Technical Committee (SAC/TC179/SC3) and submitted Focus on. This document was drafted by. The Physical Evidence Appraisal Center of the Ministry of Public Security, the Criminal Investigation Team of the Chongqing Public Security Bureau, and the Criminal Technology Detachment of the Mudanjiang Public Security Bureau. The main drafters of this document. Xue Jing, Zuo Lin, Sui Jihui, Li Xiaojun, Qin Qi, Lu Yufan, Liu Huan, Qu Huiying, Ma Rongliang, Liu Tian, Jing Yan. Forensic Science Oil Red O Reveals Handprint Technical Specifications

1 Scope

This document describes the principle of oil red O fingerprint technology, and specifies the applicable objects, equipment, reagents, Laboratory environmental requirements, operating procedures and precautions. This document is primarily applicable to the presentation of oily fingerprints on objects, especially fingerprints on wet and water-immersed objects.

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document. GA/T 144 Forensic Science Fingerprint Terminology

3 Terms and Definitions

The following terms and definitions defined in GA/T 144 apply to this document. 3.1 Oil Red O OilRedO Molecular formula is C26H24N4O, red powder, is a kind of fat dye.

4 Appearance principle

The oil red O solution can react with the oil in the fingerprint material, and the oil red O molecules in the solution enter into the fat components in the fingerprint to make the fat The fat is colored, thus showing the red handprint lines. Due to the dissolution and diffusion of the water-soluble fingerprint material, the oil in the fingerprint material still remains It can maintain its morphological distribution, so oil red O can be used to show grease fingerprints. 5 Equipment, reagents, laboratory environment requirements 5.1 Equipment Beaker, measuring cylinder, brown bottle, glass rod, funnel, filter paper, tweezers, medicine spoon, tray, electronic balance, water bath, light source, remake stand, digital camera machine etc. 5.2 Reagents Oil Red O, methanol, sodium hydroxide, propylene glycol, distilled water, etc. 5.3 Laboratory environment requirements Hygienic, clean and well ventilated. ...

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