Enterprise Standard for New Water-Based Inks

This standard specifies the varieties, technical requirements, test rules, and marking, packaging, transport and storage of new water-based inks for flexographic printing. This standard applies to water-based inks made from water-soluble resin as the main raw material with the addition of pigments, fillers and additives through composite grinding; the products can be widely used in flexographic and gravure printing for printed packaging in fields such as food, tobacco and alcohol, pharmaceuticals, cosmetics and children's toys.

1. Referenced standards

The provisions contained in the following standards constitute provisions of this standard through reference in this standard. At the time of publication of this standard, the versions shown were all valid. All standards are subject to revision, and parties using this standard should explore the possibility of using the latest versions of the following standards.

ZAB17005 Classification, naming and types of printing ink products, GB/T1723—1993 Test method for viscosity of coatings, 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 methods 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

According to product color, spot colors can be formulated on request, and the types shall comply with the requirements of ZBA17005.

1. Technical requirements

The technical indicators of this product shall meet the following requirements: Item/Indicator: Color/close to 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 (reflectance glossmeter 60℃)/﹥40%

1. Test methods

5.1 Color shall be tested in accordance with the method specified in GB/T14624.1.

5.2 Tinting strength shall be tested in accordance with the method specified in GB/T14624.2.

5.3 Fineness shall be tested in accordance with the method specified in QB559.

5.4 Viscosity shall be tested in accordance with the method specified in GB/T1723.

5.5 Initial dryness shall be tested in accordance with the method specified in GB/T13217.5.

5.6 Alkali resistance and water resistance of the ink shall be tested in accordance with QB568. The specific test method is: take printed samples after thorough drying and immerse them respectively in 1% sodium hydroxide and in water; after 24 hours, take them out and compare for changes against the color sample.

5.7 Storage stability shall be tested in accordance with the method specified in QB567.

5.8 Gloss shall be tested in accordance with the method specified in QB/T573.

1. Inspection rules

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

6.2 Factory inspection items are color, fineness and viscosity.

6.3 Type inspection shall be carried out when any of the following circumstances occurs. a. Trial production and finalization appraisal for a new product or for an old product whose production is transferred to another factory; b. after formal production has begun, if there are major changes in structure, materials or process that may affect product quality; c. during normal production, once every six months; d. when production resumes after a long period of shutdown;

6.4 Type inspection items are tinting strength, gloss, alkali resistance, water resistance and storage stability.

6.5 Products of the same color produced in the same period form one batch, and at least 50 grams shall be sampled from each batch, with attention paid to the cleanliness and sealing of the samples.

6.6 If any item fails inspection, double samples shall be taken again from the same batch for re-inspection, and the re-inspection result shall prevail; if it still fails, the batch shall be judged unqualified.

6.7 If the supplier and the buyer disagree on the inspection results and cannot resolve the matter through negotiation, arbitration inspection may be conducted by a product quality supervision and inspection institution.

1. Marking, packaging, transport and storage

7.1 Water-based inks shall be sealed and packaged in plastic drums or iron boxes, and the iron boxes shall then be packed in outer cartons.

7.2 The outside of the plastic drum shall be affixed or printed with the trademark, manufacturer, product name, type, product standard number, weight, batch number and date of manufacture.

7.3 The surface of the outer packaging shall also bear the trademark, manufacturer name, product name, type, product standard number, quantity, weight, batch number, date of manufacture and a "do not turn over" mark.

7.4 Provided the packaging requirements of 7.1 are met, the product may be transported by vehicles, ships, aircraft and other means of transport.

7.5 During transport and handling, the product must not be thrown, dropped, bumped or knocked, so as to prevent packaging damage and ink leakage.

7.6 The product must not be stored in the open air; it shall be stored at temperatures within the range of 5～53℃, and the warehouse must be dry and ventilated, protected against moisture and kept away from fire sources.

7.7 Under the storage conditions specified in 7.6, the product has a valid shelf life of one year from the date of manufacture; after expiry, all indicators shall be re-tested to check whether they meet the requirements of this standard.

——This article is reprinted from China Packaging Network (pack.cn), original link: http://news.pack.cn/show-362308.html