Page 19 - Standing Display
P. 19
THE 1887 TWO VERTICALLY OVERLAPPING SINGLES
THESE TWO HAVE THE DEEPEST COLOURING FOUND
LOWER STAMP UPPER STAMP
These stamps show very dense application of the ink throughout.
There is occasional weakness along linear edges, where there can be lighter areas.
These studies show that variations in colour are due to
(1) Variations of pigment content in the ink
(2) Bleeding into the gaps in the design, only serious in late printings
(3) The stamps are produced by handstamping in this case
(4) Variations in pressure applied during stamping
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