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Posted By: Hankron

One of the more intesting cases is the 1958 Topps baseball issue, with their seemingly solid background colors. The background colors that are primary colors (in the printer's sense, not neccesarily as we were taught as kids. Meaning, that the primary colors for modern halftone prints is not Red, Yellow an Blue) will not potentially cause a moire pattern in a scan, as they are solid color. However, backgrounds of secondary colors (such as orange) can create a moire pattern in a scan. This is because to create the secondary color the printers created dot pattern of two colors.

In short, some 1958 Topps backgrounds can create moire patterns, and some can't.