Notes from the Past

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.

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.
 
 

- R. J. Sutton 6th edition revised by K. W. Anthony
The Stamp Collector's Encyclopaedia
Published 1966
 Posted February 12, 2000

Index of 508 Notes from the Past

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