Color tracing paper
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United States of America Patent
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Oct 7, 2003
Grant Date -
N/A
app pub date -
Dec 13, 1999
filing date -
Jul 10, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An intensely colored transparent and/or translucent paper has chroma c and brightness L, as measured by a Hunterlab instrument, which measures the Cartesian coordinates a, b, L of a point P of color and its polar coordinates H and c. The paper is such that the ratio of c to L is higher than 30%, preferably higher than 50%. The paper contains a colorant in the stock, preferably 5 to 10% by weight of liquid coloring agent in relation to the weight of the finished paper. The colorant is a coloring agent which fixes directly in the cellulose. The paper is suitable for printing and/or writing.
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