"Pseudo Watermarks made using gum"
Gum Watermarks
The 1923 Republican Anniversary set of
Czechoslovakia had its gum applied in a
quadrille pattern, each stamp showing
the initials of the republic (C.S.P.) in gum
design. This pseudo watermarking is
unique and interesting.
Gum Staining
Inter-action between an inferior gum, or one
containing chemical and dye impurities, and
the inherent substances in the paper base or
even in the ink used for printing, often give
rise to unsightly stains, which adversely
affect the appearance and intrinsic value of
the affected specimens. Damp is a
predisposing cause. The 6d. G.B. embossed
stamps of 1847-54 had the gum tinted green
to enable the operator to distinguish the right
side of paper when embossing.
Ivory Head
A variety of the G. B. 1d. red and 2d. blue of
1841-57. Electro chemical action between
the constituents of the ink used and the
paper content caused eventual and variable
blueing of the paper. Owing to the
comparatively little ink upon the portrait
of the Queen, the local staining was
practically non-existent and (viewed from
the back) the head often appears almost
white upon a blued ground.
R J Sutton 6th Edition revised by K W Anthony
The Stamp Collector's Encyclopaedia
Published 1966
Posted 10/03/2022 03:42 am
