Method for making thermochromic writing instruments using topica

Details Method for making thermochromic writing instruments using topica Method for making thermochromic writing instruments using topica

1995-08-28

1998-03-03

Beck, Shrive

Coating processes

Nonuniform coating

Applying superposed diverse coatings or coating a coated base

427265, 427287, 427429, 4274301, 446 14, B05D 506, B05D 138

Patent

active

057231788

ABSTRACT:
A method for making thermochromic writing instruments using topically applied thermochromic pigments includes the steps of: providing a water-based or solvent-based lacquer having a predetermined viscosity; dispersing a predetermined concentration of thermochromic pigment in the gasket lacquer; applying the resulting thermochromic lacquer to writing instruments; removing the excess thermochromic lacquer from the coated writing instruments; and curing the coated thermochromic writing instruments.

REFERENCES:
patent: 3677801 (1972-07-01), Hardy
patent: 4028118 (1977-06-01), Nakasuji et al.
patent: 4045383 (1977-08-01), Koff
patent: 4421560 (1983-12-01), Kito et al.
patent: 4425161 (1984-01-01), Shibahashi et al.
patent: 5194183 (1993-03-01), Munch et al.
patent: 5376699 (1994-12-01), Sage
patent: 5514516 (1996-05-01), Vanmaele

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