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

That’s just test spots for the techs setting up and adjusting the printing press that printed the box. Not unique to medicine boxes; you can find the same stuff on food packaging too.

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