Watermark Detectors
Collectors know that some stamps have an invisible design printed in the paper, and the watermark detector fluid is the way to let it appear. This liquid is safe for all stamps, even photogravure, lithographed or engraved.
4oz. bottle. Recommended as the best fluid on the market. Safe for all stamps including photogravure, lithographed and engraved. Stamp inks will not run and will not harm any glue.
100ml. bottle. Recommended as the best fluid on the market. Safe for all stamps including photogravure, lithographed and engraved. Stamp inks will not run and will not harm any glue.
