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GA/T 1955-2021: Forensic sciences - Specifications for examination of plated printing methods
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GA/T 1955-2021 | English | 179 |
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Forensic sciences - Specifications for examination of plated printing methods
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GA/T 1955-2021
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Basic data | Standard ID | GA/T 1955-2021 (GA/T1955-2021) | | Description (Translated English) | Forensic sciences - Specifications for examination of plated printing methods | | Sector / Industry | Public Security (Police) Industry Standard (Recommended) | | Classification of Chinese Standard | A92 | | Word Count Estimation | 7,778 | | Issuing agency(ies) | Ministry of Public Security | GA/T 1955-2021: Forensic sciences - Specifications for examination of plated printing methods---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.
Forensic sciences - Specifications for examination of plated printing methods
ICS 13.310
CCSA92
People's Republic of China Public Safety Industry Standards
Forensic science plate making and printing document printing method
Test specification
Published on 2021-10-14
2022-05-01 Implementation
Published 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 of Standardization Documents"
drafted.
Please note that some content of this document may be patented. The issuing agency of this document assumes no responsibility for identifying patents.
This document is proposed by the National Criminal Technology Standardization Technical Committee Document Inspection Sub-Technical Committee (SAC/TC179/SC10) and
focal point.
This document was drafted by. Physical Evidence Identification Center of the Ministry of Public Security, China Criminal Police Academy, Wuxi Municipal Public Security Bureau, Beijing Municipal Public Security Bureau, Heilongjiang Provincial Public Security Bureau
Security Office, Dalian Public Security Bureau.
The main drafters of this document. Yan Haiqian, Han Xingzhou, Hao Hongguang, Guo Zihan, Wang Xiaoguang, Li Zhirong, Wang Yun, Zhang Yun, Liu Cunxiao, Yu Bo,
Cui Lan, Qin Da, Yang Qiufeng, Wang Jinsheng.
Forensic science plate making and printing document printing method
Test specification
1 Scope
This document specifies the types and characteristics of common plate-making and printing documents in the field of forensic science, preliminary preparations, inspection procedures, appraisal opinions, inspection
Inspection records, copies of inspection materials and identification documents.
This document is intended for the examination of lithographic documents in the field of forensic science.
2 Normative references
The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations
documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to
this document.
GA/T 1440-2017 Forensic scientific printing method appraisal opinion specification
3 Terms and Definitions
There are no terms and definitions that need to be defined in this document.
4 Common types of printed documents and their characteristics
4.1 Letterpress documents
4.1.1 Common types of letterpress printing documents are.
a) lead typography documents;
b) photoetched letterpress documents;
c) Photosensitive resin plate (flexographic plate) printing documents;
d) Hand-engraved letterpress documents.
4.1.2 The characteristics of common letterpress printing documents. there are raised indentations on the back of the pictures and texts, the imprints are solid, and it is easy to show the phenomenon of ink squeezing with medium and light edges and thick edges.
Excess ink is often attached to the edge of the blot.
4.2 Lithographic documents
4.2.1 Common types of lithographic documents are.
a) Lithographic documents;
b) Collate-printed documents;
c) Pre-coated photosensitive resin printing documents (PS version);
d) Computer-to-plate printing files (CTP version).
4.2.2 The characteristics of common lithographic documents. the imprint is flat, the edges of the image and text are neat but void, there is no printing plate indentation, the ink color of the imprint is uniform, and the blank space
There are often dirty ink spots, and whiteness is common on the pictures and texts.
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