Examples of glass folds; glass folds are pieces of glass that were too cold in the mold and did not completely blend with the rest of the glass in the press, resulting in folds or patches of glass around an identifiable area. Small folds around the crown often occur as single lines or marks in the glass, usually the result of small stringers left from cutting the glass as it was placed into the previous mold. Glass folds are considered manufacturing defects and usually detract from the value of a piece.
Example of a glass fold on CD 154.
Example of a crown fold on CD 154, the result of "stringers," cooler pieces of glass
at the end of the molten glass that was cut to be placed into the mold.
These are often small single lines of glass.