Hi, we silkscreened into a pp sheets to make notebooks and the result is quite good but after we spiral bind the paper with the "silkscreened pp cover", we found on some of the product that the ink seems to rub off to the paper inside.
Is it because of the technique or the ink? Do we need to coat on top of it to prevent it to flake off to the paper? Can anyone point out on how to resolve it? Any hint or help is greatly appriciated
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