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Almost without exception the watermarks on postagestamps are thin spots impressed into the wet pulp. Whenheld before a light, these thin spots show up as lighterareas than the rest of the paper. Everyone is familiarwith this form of watermark as it occurs on "bond" paper,used extensively for typewriter paper. The exact reverseof this watermark is also possible—a watermark in which the designs attached to the dandy roll cause a thickspot in the paper. This form of watermarking is oftencalled a "shadow" mark. Stamp collectors are familiarwith it on some of the early stamps of Russia. Carriedto its ultimate development the shadow mark can beof greatest artistic quality and the most beautiful picturesmay be reproduced within the paper by this process. |
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