Defects Caused By Improper Pressing: Staining

Sometimes moisture is used to press a comic. Overuse can cause staining, illustrated in the two accompanying pictures. The books most susceptible to staining are from the early 50s to the mid-60s, and comics that exhibit tanned covers. Excessive moisture can wash away the clay coating used in the printing process for this era of comics, and leave behind spots or tide lines. Stains like these are most commonly found on the inside covers, particularly along the spine area or edges. Stains can also appear on the outside of covers, usually near the spine or outer corners. With the exception of a small isolated stain, this side effect cannot be corrected unless extensive water or solvent cleaning (restoration) is utilized.

Staining caused by improper pressing Click images to enlarge.