Test method for the color of the hottest ink 2

Ink color inspection method

1. Principle

compare the sample with the standard sample by parallel scraping, and check whether the color of the sample conforms to the standard sample

2. Tools and materials

(1) inking knife wood handle conical steel body, 200mm long, 20mm at the widest and 8mm at the narrowest

(2) blade made of stainless steel, 92mm × 59mm × 0.5mm, with the blade width of 9mm, bending outward by 25 °

(3) glass plate 20 these extrusion equipment will soon become indispensable or irreplaceable equipment due to special technology × 200mm × 5mm。

(4) scraping paper and blueprint paper (conforming to ZB Y32 002), specification 110mm × 65mm, 5mm wide black solid bottom horizontal channel is located mm below the top

(5) cellophane 65mm × 30mm。

3. Inspection conditions

(1) the inspection should be carried out under the conditions of temperature (25 ± 1) ℃ and relative humidity 65 ± 5 in the plastic industry

(2) the inspection of face color and color light should be carried out under a standard illuminant with an incident angle of 45 ° ± 5 °

(3) when checking the background color, the scraped sample should be perspective

4. Test steps

(1) use an inking knife to take about 5g of the standard sample and the sample respectively, place them on the glass plate, and mix them separately without knowing it

(2) use an inking knife to sample about 0.5g and apply it to the upper left of the scraping paper, and then take about 0.5g of the sample and apply it to the upper right of the scraping paper. The two should be adjacent and not connected

(3) place the scraper over the coated ink sample so that the main part of the scraper is 90 ° to the scraping paper. Scrape the ink into a thin layer from top to bottom on the scraping paper, and reduce the force when it reaches 15mm below the black cross passage. Make the inner angle of the blade approximately 25 °, so that the ink is coated into a thick ink layer on the paper. The final scraping shape should be similar to the figure

(4) the ink on the scraping paper is thin, and their equipment uses SLS process layer called complexion; The ink aggressive layer at the lower part of the scraping paper is called ink; The light perspective of the thin layer of ink on the scraping paper is called the background color

(5) after the ink color inspection, cover the cellophane on the thick ink layer

5. Inspection results

(1) lithographic ink and relief ink focus on checking whether the face color and background color of the sample are similar and consistent with the standard sample

(2) gravure ink is used for hole printing ink and paper. It is important to check whether the complexion of the sample is similar and consistent with the standard sample

(3) the test results should be based on the face color and background color observed within 5min after scraping, and the ink color is for reference

source: fine chemicals in the 21st century