Plastic flexible packaging gravure printing ink in the routine detection

Detection project inspection method standard tool tinting strength respectively take 1 g sample and standard sample ink, white ink diluent dilution respectively, of the 10 g in quantity and in a standard sample paper shave sample compared to the sample is consistent with the standard, S = D/C× 100%. S = percentage tinting strength, C = dilute standard sample used white ink is D = dilute ink white ink is used. 95 ~ 100% jar, beaker glass rod scales white ink color sample and standard sample on the test paper side by side with a small knife scraping the visual contrast color card sample test paper black small scraping blade fineness with QXP50 type scraper fineness meter in place of 50 um put a few samples within 3 s, vertical visual 3 ~ 10 and 30 degrees for the ink fineness of ink particles. < 15 umqxp50 fineness meter viscosity try QND cup with 4 seconds reading for the ink viscosity and calculation time - - - - - - - - S25 S30 ~ 70 ℃ QND4 measuring cup adhesion fastness sticky: with a small knife scraping samples after try out with adhesive tape paper. : on the printing area, with LiWei to pull, see if ink off. Massage: plastic flexible packaging printing surface relative 10 times, rubbing whether ink fall off. ≥ 90% at the beginning of the scraping blade with dry way try fineness, quickly after scraping samples, cover with a layer of plastic film, with a small job pressure three times and then open the roller dry observation is 20 ~ 50 mmqxp50 fineness meter small rubber roller adhesion resistance take sample on the plastic flexible packaging print sample, after drying, After 6 h) Folding pressure ( 2kg) At 50 ℃ & plusmn; 1 ℃ for 24 h after observation, whether the ink off. 90% weight, constant temperature box thread head with a knife to stir up ink, ink downwards into filaments, filaments as long as possible. - A knife