My new order is printing pantone pms on black colour paper . The previous jobs have to print opaque white ink on black paper and let it dry before print pms. How I measure and control opaque white ink film thickness ? I've Techkon Spectroden" Thank you for idea
Measure the ink density of white just like any other ink, however, you want a lower value, maybe 0.20? Higher density means you have less white ink.
Offset litho is a very thin ink film thickness (IFT), maybe 1 micron (1um). So it won't be opaque, rather translucent. You may need multiple hits/bumps/plates or even passes. Opaque white is best if its done with UV dry trap, dry relief plate, or flexo anilox spot coating.
I would have ink company little joe proof Pantone color over white base over black paper to make sure you can get a color match.
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