Coating standard: gb1864-80 method for determination of pigment color and light

Core tip: this standard is applicable to the determination of pigment color For a certain amount of test sample and standard sample, add the same volume of oil, and the color that appears after mixing and grinding is evaluated by visual inspection The color difference is expressed in four grades, i.e approximate, micro, slightly and relatively 1 materials and instruments Inking oil (made of pure linseed oil); Pigment: no more than 8 (using iron cobalt colorimeter); Acid value: no more than 8mgkoh / g; Scraping: Ink adjusting knife (178mm long, 7-18mm wide); Pictorial Printing Paper (qb129, quality 100g / m2); Tracing drawing (qb128); Application scope and advantages of roller ceramic coating Recommended introduction: the surface of ceramic rubber plate used for roller ceramic coating is cast into durable rubber plate by hundreds of independent small ceramic pieces Each ceramic piece has raised characteristics Under general conveyor belt pressure, thousands of unique cast bumps can produce positive traction, prevent slipping and extend the service life of conveyor belt roller At the same time, the bottom layer adopts high-quality rubber, which has strong elasticity and can play a good impact resistance role The scope of application of roller ceramic coating is one three six 83857180 (the same as V) 1 Roller coating in extremely harsh working environment 2 The belt joint is not suitable for fixing with iron buckle; 3 It is suitable for leather Home of coatings: this standard is applicable to the determination of color and light of pigments For a certain amount of test samples and standard samples, add oil of the same volume, and the color that appears after mixing and grinding is evaluated by visual inspection The difference in color is expressed by four grades, i.e approximate, micro, slightly and relatively 1 Inking oil for materials and instruments (made of pure linseed oil); pigment: no more than 8 (with iron cobalt colorimeter); acid value: no more than 8mgkoh / g; scraper: inking knife (178mm long, Width: 7-18mm; pictorial Printing Paper (qb129, mass: 100g / m2); tracing paper (qb128); syringe (capacity: 1ml); analytical balance (sensitivity: 0.001); flat grinder (pm-240) 2 Determination step 2.1 preparation of pigment paste, weigh 1g (accurate to 0.001g) of standard pigment sample, draw a certain volume of inking oil with syringe at 25 ± 2 ℃ (depending on different pigments, see the table below for details), put the pigment and inking oil on the ground glass of flat mill On the surface, use the ink adjusting knife to mix the paste The color paste is placed at 1 / 4 of the radius from the center of the glass in four points Add 4.5kg weight on the lever bracket for grinding For each 25 or 50 times of grinding, see the following table for the number and times of grinding: pigment name, pigment (g), inking oil (ML), number of grinding cycles (Times) each time, white pigment 1:0.5 ~ 1.550 4 iron blue 1:1 ~ 250 5 chrome yellow, molybdic chrome red 1:0.5 ~ 125 3 phthalocyanine 1:2 ~ 350 6 dye Lake 1:0.7 ~ 1.5 25 4 iron oxide pigment 1:0.5 ~ 1 25 9 dye original 1:2 ~ 3 50 4 Carbon black 1:4 ~ 5.5504 azo system 1:1.5 ~ 2.5504 ground pigment paste is collected in one place for standby The color paste of the pigment sample under test by the same method 2.2 color light identification method: select a little of the prepared color paste with the ink adjusting knife and apply it on the pictorial Printing paper The color paste of the standard sample is placed on the left side, and the color paste of the test sample is placed on the right side The parallel distance between the two color pastes is about 15mm Scrape them evenly with a scraper, and observe the face color and ink color immediately under the indoor light scattering towards the north or under the standard light source to compare the color difference The grading of color and light difference is divided into four grades: approximate, micro, slightly and relatively; when the face color and ink color of the sample and the standard sample are similar, they are rated as "approximate"; when the face color and ink color of the sample and the standard sample are slightly different, they are rated as "micro"; when the face color and ink color of the sample and the standard sample are different, they are rated as "slightly"; When the face color and ink color of the sample and the standard sample are obviously different, they shall be rated as "relatively" level, among which, the comments on the hue and shade shall be included after micro, slight and relatively Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,