CY/T 212-2020 in English

VALID

Requirements and test methods for printability status of sheet-fed ofset press

Issued on:2020-11-16
Implemented on:2021-02-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $180.00
$175.00

Standard No:	CY/T 212-2020
Document status:	VALID
Title in English:	Requirements and test methods for printability status of sheet-fed ofset press
Title in Chinese:	单张纸胶印机适印状态要求及检验方法
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2020-11-16
Implemented on:	2021-02-01
ICS Classification:	37.100.01-Graphic technology in general
Chinese Classification:	A17-Printing Technology
Professional Classification:	CY-Publication
Related Topics:	cy/t+ cy/t cy/t 35 cy/t 79 cy/copy request work status cy/t 7.3 cy/t 40 status standard suitable ingredients sheet paper glue cy/t 5 cy/t 6 Indian fit Applicability of test methods offset printing CY/T 3 How to detect paper Suitable for Indonesian motors Singlet oxygen preparation method Copy paper paper quality inspection Offset printing press

本标准规定了单张纸胶印机适印状态的技术要求、检验条件及检验方法。
本标准适用于单张纸胶印机安装、使用、维护及检修的状态评价

Introduction

Analysis of Standard Technical Framework

Core Indicators	Technical Requirements	Test Methods	Reference Standards
Paper Feeding Precision	≤0.030mm	GB/T 3264-2013 6.4.2.1	Overprint Position Deviation Detection
Paper Transfer Precision	≤0.028mm	GB/T 3264-2013 6.4.2.2	Multi-color transfer deviation detection
Dot restoration uniformity	Difference ≤3%	70 lines/cm square dot test	GB/T 7705-2008

Key detection technology points

Measuring point distribution specification: According to the requirements of standard Figure 1, select at least 5 measuring points (four corners + center) for each sample, and use a 25x scale magnifying glass and a reflection densitometer that complies with GB/T 23649 for detection.

Environmental control standards: The testing environment needs to maintain a temperature of 23±5℃ and a humidity of 55±10%. The pH value of the wetting liquid is strictly controlled between 5.0-5.5, and the conductivity is 800-1400μS/cm.

Implementation and application suggestions

CTP plate It is recommended to use high-quality plates with a press life of ≥100,000 prints.
157g/m² coated paper (GB/T 10335.1) is preferred for test paper, and the thread direction must be perpendicular to the paper feed direction.
When testing printing stability, it is necessary to print continuously at 85% of the maximum speed, and sample 2 sheets for density comparison for every 100 sheets.

Standard evolution analysis

Compared with CY/T 5-1999, the innovations of this standard are: ① Added a quantitative indicator of paper transfer precision (0.028mm); ② Introduced a 3% tolerance standard for dot reproduction uniformity; ③ Clarified the control range of dampening solution temperature (8-12℃). These improvements reflect the higher demands of modern offset printing for color consistency and registration accuracy.

More samples: YD/T 3934-2021 QC/T 942-2021 DL/T 5154-2012

Sample only — not a preview of CY/T 212-2020