Record receiver having plural interactive leaves or a colorless – Having a colorless color-former – developer therefor – or... – Heavy metal reactant
Patent
1993-12-15
1996-01-09
Hess, B. Hamilton
Record receiver having plural interactive leaves or a colorless
Having a colorless color-former, developer therefor, or...
Heavy metal reactant
430200, 430201, 503211, 503212, 503216, 503225, B41M 530
Patent
active
054829135
ABSTRACT:
A dispersion of a carbonate type blocked color developer having a hydroxyl group having a color developing function which is blocked by an O-substituted oxycarbonyl group (--(C.dbd.O)OR.sub.1), and a metal salt of an organic acid or inorganic acid or a leuco dye are mixed to obtain an opaque undeveloped coating color, and the coating color is coated on paper or the like to obtain a recording sheet. Also, the coating color is further mixed with a light absorbent to obtain an opaque undeveloped coating color, which is coated on paper or the like to obtain an optical recording sheet.
REFERENCES:
patent: 4439512 (1984-03-01), Ceintrey
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Nagai Tomoaki
Satake Toshimi
Sekine Akio
Takano Toshiyuki
Hess B. Hamilton
Nippon Paper Industries Co. Ltd.
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