New Water-Based Ink Enterprise Standard: Technical Indicators and Testing Rules for Flexo and Gravure Packaging

This standard sets out product categories, technical criteria, testing rules, and requirements for marking, packaging, transport, and storage of new water-based inks for flexographic printing.

It applies to water-based inks manufactured by compound grinding, using water-soluble resin as the primary raw material together with pigments, fillers, and additives.

Such products can be widely used in flexographic and gravure printing for packaging in food, tobacco and alcohol, pharmaceuticals, cosmetics, children's toys, and related sectors.

1. Normative References

The clauses of the following standards become clauses of this standard when cited here. At the time of publication, the listed versions were valid. All standards will be revised, and users of this standard should consider whether the latest versions of the following standards can be applied.

ZAB17005 Classification, nomenclature and type designation of printing ink products

GB/T1723—1993 Test method for coating viscosity

GB/T13217.5－1991 Standard test method for gravure plastic inks — initial dryness test

GB/T14624.1－1993 Test method for ink color

GB/T14624.2－1993 Test method for ink tinting strength

QB559－1983 Test method for ink fineness

QB568－1983 Test method for ink resistance to ethanol, alkali, acid and water

QB567－1983 Test method for ink stability

QB573－1987 Test method for ink gloss

1. Product Classification

Products can be customized into spot colors according to color requirements, and their type designations should comply with ZBA17005.

1. Technical Requirements

The product's technical indicators should meet the following requirements:

Item / Index:

Color / approximately the standard sample

Fineness (um) / ≤20

Tinting strength (%) / 90–110

Viscosity (coating No. 4 cup, seconds / 25℃) / 50±30

Initial dryness (cm) / 30–50

Alkali resistance, water resistance / good

Storage stability (5–30℃) / good

Gloss (reflection gloss meter at 60℃) / >40%

1. Test Methods

5.1 Color is tested according to GB/T14624.1.

5.2 Tinting strength is tested according to GB/T14624.2.

5.3 Fineness is tested according to QB559.

5.4 Viscosity is tested according to GB/T1723.

5.5 Initial dryness is tested according to GB/T13217.5.

5.6 Alkali and water resistance of the ink is tested according to QB568. Specifically, fully dried printed samples are immersed separately in 1% sodium hydroxide solution and water; after 24 hours, they are removed and compared with the color sample for changes.

5.7 Storage stability is tested according to QB567.

5.8 Gloss is tested according to QB/T573.

1. Inspection Rules

6.1 Before shipment, products must be inspected by the manufacturer's inspection department; they may leave the factory only after passing inspection and with a certificate of conformity attached.

6.2 Factory inspection items include color, fineness, and viscosity.

6.3 Type inspection should be carried out when one of the following situations occurs.

— This article is reprinted from China Packaging Network (pack.cn), original link: http://news.pack.cn/show-362234.html