CY/T 227-2020 in English

VALID

Requirements and test methods of UV inks for flexographic printing

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

Price(USD)： $210.00
$204.00

Standard No:	CY/T 227-2020
Document status:	VALID
Title in English:	Requirements and test methods of UV inks for flexographic printing
Title in Chinese:	柔性版印刷紫外光固化油墨使用要求及检验方法
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
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本标准规定了使用网纹辊传墨的柔性版印刷紫外光固化油墨在印刷使用中所涉及的术语和定义、技术要求及检验方法。
本标准适用于塑料及纸质承印材料的柔性版印刷紫外光固化油墨。

Introduction

Analysis of the core content of the standard

This standard systematically regulates the technical indicator system of UV curing inks for flexographic printing for the first time, focusing on controlling key parameters such as curing energy (≤35 mJ/cm²) and viscosity range (500-3000 mPa·s), filling the gap in the industry.

Comparison Analysis of Technical Indicators

Project	International Standard	CY/T 227 Requirements	Test Method
Curing Energy	ASTM D5264	≤35 mJ/cm²	Appendix A UV Test Paper Method
Color Difference Control	ISO 12647-6	△Eab*≤2.0	Spectrophotometer Method
Thixotropy	DIN 53214	Viscosity increase ≤ 20%	Rotational viscometer method

Key process control points

Anilox roller matching principle

The standard stipulates that the number of lines on the anilox roller should be 4-7 times the number of lines on the printing plate. For example, when using a 150 lines/inch printing plate, it is recommended to use an anilox roller with 600-1050 lines/inch.

Curing system configuration

UV wavelength: 280-420nm band
Cooling system: must be equipped with forced air cooling or water cooling device
Energy monitoring: it is recommended to calibrate with UV test paper every 4 hours

Solutions to common problems

Handling of poor curing:When ink adhesion occurs, check: ① UV lamp life (usually ≤1000 hours) ② Cleanliness of reflector ③ Surface tension of substrate (≥38 dyn/cm)

Suggestions for the implementation of standards

Establish an ink entry inspection system, focusing on monitoring fineness (≤10μm) and initial viscosity
The printing workshop needs to maintain a constant temperature environment of 23±5℃
It is recommended to check the wear of the anilox roller every 5,000 prints

More samples: YD/T 3934-2021 JJG 21-2008 QC/T 942-2021

Sample only — not a preview of CY/T 227-2020