Inorganic sheet carrying symbols for making pigments
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United States of America Patent
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Jan 6, 2004
Grant Date -
N/A
app pub date -
Feb 20, 2001
filing date -
Aug 6, 1998
priority date (Note) -
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Abstract
Inorganic sheets (10) of at least two surperposed layers are provided with one or more symbols (20) which have a size of between 1 and 10 .mu.m. The inorganic sheet is made up into pigment flakes (15). The symbols on the pigment flakes (15) allow a tracing of compositions such as printing inks or paintings and of substrates carrying such compositions.
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