Watermark Detection Tools and Fluids

Watermark Detection is essential to the identification and VALUATION of a stamp. The presence of a watermark is sometimes the single feature that distinguish a common stamp from a rare one. Made during the manufacture of the paper used to produce the stamp, by intentionally impressing an image into the still wet paper. Where the image is impressed, the paper is thinner and the image can be seen by holding the paper up to a light, or setting it against a dark background and applying watermark fluid to your stamp.
The detection of thins, faults and repairs can also be made with the equipment used to detect watermarks, and again this detection is essential to the proper valuation of a stamp.