GA/T 1579.4-2019Forensic sciences -- Specifications for collection of printed samples - Part 4: Photocopies (English PDF)

Foreword

-Part 1. Seals and seals;

-Part 2. plate-making printing documents;

-Part 3. print files;

-Part 4. Copy documents;

-Part 5. Fax documents;

-Part 6. Other printed documents.

This section is drafted in accordance with the rules given in GB/T 1.1-2009.

This section is proposed and managed by the National Criminal Technical Standardization Technical Committee Document Inspection Sub-Technical Committee (SAC/TC179/SC10).

This section was drafted. Criminal Investigation Corps of Zhejiang Provincial Public Security Department, Department of Criminal Science and Technology of Zhejiang Police Academy, Material Evidence Identification Center of the Ministry of Public Security.

1 Scope

This section specifies the extraction principles, extraction requirements and precautions for the inspection samples of scientific copies of forensic documents.

This section applies to the extraction of test samples of copied documents in the field of forensic science.

2 Extraction principle

3 Extraction requirements

3.1 The extracted samples shall be taken from the original.

3.2 Experimental sample extraction.

a) The experimental sample should be as consistent as possible with the material in the paper type, graphic layout, font, font size, color, etc.

b) When necessary, select different paper feed directions, shades, and zoom ratios for extraction;

c) there should be a blank copy of the largest format;

d) there should be a blank copy of the largest format;

e) The number of experimental samples should be no less than 3 in each condition.

4 Notes

4.1 Samples of copied documents should be kept in their original appearance, and destructive fixing methods such as sticking, plastic packaging, folding, and binding should not be used.

Stop being polluted and confused.

4.2 Sample extraction should be recorded and identified, and sealed with suitable packaging bags (boxes).

4.3 The extraction records shall include (but not limited to) the condition of the copier (brand, model, repair, maintenance or replacement records, etc.), extraction Unit, person, place and time.

4.4 If conditions permit, the sample extraction process can be fixed by taking photos (videos).