GB/T 37233-2018 in English

VALID

Specification for forensic examination of document formation time

Issued on:2018-12-28
Implemented on:2019-04-01
File Format:PDF
Delivery:Via email within 5 business days

Price(USD)： $310.00
$301.00

Standard No:	GB/T 37233-2018
Document status:	VALID
Title in English:	Specification for forensic examination of document formation time
Title in Chinese:	文件制作时间鉴定技术规范
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 5 business days
Issued on:	2018-12-28
Implemented on:	2019-04-01
ICS Classification:	13.310-Protection against crime
Professional Classification:	GB-National Standard
Related Keywords:	sample nominal time document production time background document formation time introduction national standard formation time document identification steps
Related Topics:	The time of major departmental system reform The time of major departmental system reform The time of major departmental system reform Instantaneous action time time mechanism time as time technology time technology timing technique time measurement technology production time production time timekeeping piece Document Production Time Identification Technical Specification Identification gb37233 GB/T 37233-2018 time gb time job identification Specification implementation time technology and time gb/t+37233 temporal template identification Inhibition time GBT37233 GB/T 37233-2018 Document Creation Time Identification Technology Document creation time identification technology time technology

《GB/T 37233-2018文件制作时间鉴定技术规范》由315（司法部）归口，主管部门为司法部。

Introduction

National Standard of the People's Republic of China GB/T 37233—2018 Technical Specification for the Identification of Document Production Time

Background and Significance of Standard Formulation

The identification of the production time of a document is of great significance in judicial practice. By accurately judging the formation time of a document, it is possible to effectively prevent and expose document forgery and ensure judicial fairness.

The GB/T 37233—2018 standard was formulated based on many years of research and practice, integrating the identification methods of various document types (printing, electrostatic copying, and seal imprints), and providing a unified technical specification for judicial identification.

Main identification methods

Printing documents: analysis based on the stage and synchronous characteristics of printing
Electrostatic copying documents: application of the stage and synchronous characteristics of electrostatic copying
Seal text: judging the stamping time by the aging and defect characteristics of the seal text
Ink and red ink sequence: analysis of the microscopic characteristics of the intersection to determine the sequence

Identification methods	Applicable scenarios	Key features
Printing documents	Documents related to printer manufacturing	Printing stage characteristics, Synchronic characteristics
Electrostatic copying documents	Documents related to copier manufacturing	Stage characteristics of electrostatic copying, synchronous characteristics
Seal marks	Documents that require determination of stamping time	Printing surface defects, Distribution of attachments

Identification steps and implementation suggestions

Printed document identification steps

Sample inspection: Analysis of printing form and digital watermark characteristics
Sample inspection: Determine the sample nominal time and analyze the printing characteristics
Comparative inspection: Comparison of the stage and synchronous characteristics of documents printed on the same machine

Identification steps for electrostatic copy documents

Sample inspection: Analyze the model and characteristics of electrostatic copiers
Sample inspection: Determine the sample nominal time and analyze the copying characteristics
Comparative inspection: Compare the stage and synchronous characteristics of documents copied by the same machine

Identification steps for seals and seal inscriptions

Sample inspection: Analyze the distribution characteristics of seal surface defects and attachments
Sample inspection: Determine the sample nominal time and analyze the copying characteristics
Comparative inspection: Compare the synchronous characteristics of the same seal in different time periods

Identification method and case analysis of the time sequence of red and black ink

Microscopic inspection method

Use a high-power microscope to observe the microscopic features of the intersection of printed characters to determine the formation order. For example, if the characters are printed first and then printed, the strokes of the characters are continuous, but the printed text may be shrunk or missing.

Fluorescence inspection method

Use fluorescence features to analyze the distribution of printed text and text materials to determine the formation order. For example, if the characters are printed first and then printed, the printed text may be covered by the text colorant and have dragging marks.

Types of appraisal opinions and judgment basis

Printing documents

Appraisal opinions	Applicable conditions
Determine that the printing is formed in a certain period of time	The inspection material and the sample are printed by the same printer, and the phase characteristics meet
Tend to be earlier/later	The phase characteristics of the sample have certain value, but do not fully meet

Seal and stamp

The types of appraisal opinions include: stamping in a certain period of time, tending to be earlier/later, and unable to judge. The judgment is mainly based on the defects of the stamp and the distribution of ink marks.

Implementation Suggestions

Identification agencies should establish standardized laboratories equipped with advanced instruments and equipment
Strengthen the training of identification personnel to improve their technical level and judgment ability
Regularly update the sample database to ensure the effectiveness of the comparison conditions

More samples: GB 18306-2015 GB 50021-2001(2009) JC/T 2453-2018

Sample only — not a preview of GB/T 37233-2018