O is for Opacity

blog alphabetseries-01

Welcome to our #OKalphabetseries where we visit paper and printing terms daily. Come back each day as we weave our way through the alphabet and share our 110 years of knowledge with you.
O is Opacity
Opacity is just one of the many properties of a sheet of paper. Opacity measures the amount of light that can be seen through a sheet of paper in values of 1 (the most transparent) through 100 (the most opaque). The higher the opacity of a sheet of paper, the less “show through” of the printing from the opposite side or the sheet below. You'll want to pick a sheet with good opacity when your layout has solids of color, heavy coverage or bold type. When color dyes are added to a sheet, opacity increases. Increasing a paper’s basis weight also increases opacity. The whiteness and smoothness of a sheet tends to decrease opacity. Note, sometimes the amount of printing ink “show through” from the reverse side of a sheet of paper is the result of ink absorption and penetration through the sheet.  Your opacity issue could be optical or structural. Fillers, coatings and formation all affect opacity.

P is for Perfect Binding
M is for M-Weight

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