Ink color test methods

The sample 1, the principle and the prototype with parallel method of contrast, examine the sample color is in line with the same sample. 2, tools and materials ( 1) Ink with wooden handle tapered steel body, 200 mm long, at its widest point 20 mm, the narrowest place 8 mm. ( 2) Doctor blade system of stainless steel sheet, 92 mm x 59 mm x 0. 5 mm, blade width 9 mm at 25 ° bend outward. ( 3) Glass plate 200 mm * 200 mm * 5 mm. ( 4) Scraping the sample paper printing paper ( Accord with ZB Y32 002) 110 mm * 65 mm, specification, the top 60 - down 65 mm is 5 mm wide black bottom crossing. ( 5) Pt 65 mm x 30 mm. 3, test conditions, 1) Inspection should be in in the temperature ( 25±1） ℃, relative humidity 65 + 5 conditions. ( 2) Examine the complexion and color should be the standard of the incidence Angle 45 ° + 5 ° lighting body. ( 3) Examines the background should be sample light perspective. 4, test steps ( 1) With ink knife for the prototype and sample each about 5 g, placed in a glass plate, respectively, to make it. ( 2) With ink knife sample about 0. 5 g on samples of the upper left, then take sample about 0. 5 g on samples of the top right, both should be not connected. ( 3) Puts blade pasted ink samples above, make the main body of smears and scraping of samples is 90 °. From top to bottom to ink scraping samples of paper into a thin layer, to 15 mm below black crossing, to reduce force. Make the inside of the blade Angle is approximately 25 °, make the ink on the paper painted thicker ink layer. Figure 13 - ultimately shape scraping the sample should be with 1. ( 4) Scrape ink thin layer called the complexion of samples; Scraping the lower part of samples of ink layer called the inky progress; Scrape ink sample paper thin layer of light perspective is referred to as the base. ( 5) Ink color inspection, cellophane covered in thick ink layer. 5, inspection results ( 1) Offset printing ink, letterpress printing ink key examine sample complexion and the base of color is consistent with the prototype approximation,. ( 2) Mesh version of the ink, paper gravure ink key examines whether complexion is consistent with the prototype approximation, sample. ( 3) Test results should be within 5 min after scraping sample observation complexion and color shall prevail, as required for your reference.