Thursday, 20 June 2019

7 step procedure for ink matching #printing

Brief

Ink Matching Department is the place where ink is prepared for printing (other than CYAN, MAGENTA, YELLOW, BLACK colors) and Packed. Here, many base inks are present with the help of which colors are formed for example - red, blue, opaque white etc.

Apparatus Used 

Draw down kit, Weighing scale, UV Heater, Chromatic Light boxes, Mixing machines, ink knives, pantone colour matching guides etc.

Standard Procedure –

  1. First, the sample is taken on the table and Spectrophometer is connected to the computer with installed software
  2. Spectrophotometer is used for taking the l,a,b values of color & when l,a,b value are measured then those values are set to be standard values
  3. After which those l,a,b values are sent to software and it is done 3-4 times for accuracy.
  4. After which, the paper type is selected by doing the same with the paper on which we have to print.
  5. When this all is done in the computer the computer software will give a recipe for that particular color for about 1 or 10 kg
  6. After which we take all the colors as specified by software in recipe in adequate amount and mix the same with the mixing machines.
  7. After mixing we take draw down of the color for just verification that the color that we have made is either accurate or not. If it is accurate then we had made that color. If it is not, then we add a bit amount of other colors like transparent white to match the color with standard

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