A Grateful People/Bless The Lord - Lyrics - Watermark

A watermark is a recognizable image or pattern in paper that appears as various shades of lightness darkness when viewed by transmitted light , caused by thickness or density variations in the paper. Watermarks have been used on postage stamps, currency, and other government documents to discourage counterfeiting. There are two main ways of producing watermarks in paper; the dandy roll process, and the more complex cylinder mould process.