Why do some medication paper boxes have circles or text of CMYK colors printed somewhere on them?

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I have a box of medications for a throat pain and there is a total of five small circles. Four of them are the perfect representation of CMYK colors, so cyan, magenta, yellow and black. The fifth one is a shade of green that’s used for the text on the white paper box. The names of the four CMYK colors are also written on the box in their respective colors.

Not every medication box seems to have these colors. But yesterday I threw away an empty paper box of cough meds, that also had CMYK colored circles printed on it.

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Anonymous 0 Comments

if the box has been printed using lithographic methods, eg a printing press from 4 sheets of film (C,M,Y,K) then it needs to be on register. this means all lined up and working, essentially.

Registration marks show the colours it printed – and the alignment (targets, crosshairs). If it doesn’t have this, it was likely done on a digital run, so the printer itself will handle registration.

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