1867 Essays

Henry Loewenberg

Essay's

This essay was Henry Loewenbergs idea of a tamper proof stamp, any attempt at removal of the stamp from the envelope would leave the ink on the envelope. To achieve this the stamp was painted on onion skin paper (thin, transparent paper) and gum was applied on top of the printed ink.

He called his process 'Decalcomania'

79-E8a Plate Essay
on Onionskin
Gummed

79-E8c Plate Essay
on More Opaque Onion Skin Paper

79-E9a Plate Essay
On White Paper


79-E9b Plate Essay
On Clear White Paper

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