Study On A New Method For Controlling Ink Thickness In Print Color Matching

In the course of matching spot-color ink, we need to make printing samples with a certain ink thickness to observe color effect. At present, most of printing factories use scraping blade to make printing samples, that is affected by subjective things easily, and difficult to control. Aim at this, we put forward a new method.This article researched and analyzed the relation between ink thickness and spot-color reappearance to verify the influence of ink thickness on matching spot-color ink. The result showed that when ink thickness increased, the density of presswork increased, the brilliance L~* fall, but a~*,b~* changed little. Based on mechanical principle and design knowledge, we researched and developed a mechanical device (scraping ink instrument) to achieve making printing samples with stick, choiced and designed scraping ink instrument's driving unit,actuating unit. The importance of this article was that we advanced a logical processing method aim to small groove around stick. We processed a series of sticks and completed experiment of scraping printing samples with sticks. The result showed that when small groove around stick became shallow, printing samples's ink thickness increased, basically accorded with theoretic count result. This could control ink thickness accurately.Scraping ink instrument has simple structure, convenient operation, and can control ink thickness accurately. At the same time, it achieve mechanized scraping printing samples, so the requirement foreground is good.