Albino

An albino is a stamp or postal stationery item where there is no printing or no printed ink.

It can be caused by a paper foldover or production problems. This is most obvious where there is an embossed image along with a prnted part. This is often seen with the stamps of Sardinia where examples are printer's waste of unfinished stamps. Postal stationery albinos also exist. They are not rare in United States stationery envelopes.  File:US Envelope albino.jpg|Detail of a 2c albino US embossed envelope from the first half of the 20th Century 

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