(under subclass 146) Processes in which a transferable coating includes a component reactable with a chemical reagent during the transferring operation to produce a color change in situ on the receiving surface or in which a base is coated with a component intended to react with another component to produce a color change.
(1) Note. The reaction of color forming constituents may be initiated, for instance, by heat or pressure from a writing instrument.
(2) Note. The source of heat utilized to effect reaction of the color forming constituents in the production of facsimiles is usually radiant energy. The particular process involved is usually referred to as thermos:graphic duplication.
(3) Note. The copy sheet may include components intended to react to produce a color in situ.
(4) Note. The transferable coating may include a component intended to be treated with a chemical reagent during the transferring operation to produce a color change in situ on the receiving surface.
(5) Note. The processes may be directed to superimposing at least two different coatings onto a base in which at least two of the coatings include a component intended to react with a component of a different coating to produce a color in situ. SEE OR SEARCH THIS CLASS, SUBCLASS:
146, and 152, for processes directed to exposing a normally colored but invisible coating by transparentizing or removal of the material which conceals the colored composition or ingredient and in which there is no reaction to produce a color.
SEE OR SEARCH CLASS
8, Bleaching and Dyeing; Fluid Treatment and Chemical Modification of Textiles and Fibers,
444, for dyeing processes involving the use of radiant energy.
250, Radiant Energy, appropriate subclasses for processes for the development, conversion, production, transmission and general utilization of rays of any type.
252, Compositions,
408.1, for analytical, testing or indicating compositions.
346, Recorders,
135.1, for a base coated with a record receiving material which is more than a mere coated base.
436, Chemistry: Analytical and Immunological Testing,
1+, for analytical and analytical control methods.
