Abstract: Ink formulations for use in printing polyvinyl butyral sheets are described. The formulations comprise polyvinyl formal, and polyvinyl butyral sheets printed using the formulations are found to have a reduced tendency to exhibit blocking.

Abstract: Internal reflection of an optical glass is suppressed by applying a coating material comprising a material selected from coal tar and coal tar pitch and a resin selected from vinylidene chloride series copolymers and halogenated epoxy resins.

Abstract: A writing liquid is formed from a solvent for an organic styrene resin pigment in combination with a chlorofluoroalkane of from 1 to 3 carbon atoms. The potential toxicity of the solvent (or solvent vapors) is eliminated and writing speeds of the writing liquid are improved by the addition of the chlorofluoroalkane. The writing liquid is used for transparentizing an opaque layer of an organic styrene resin pigment, uniformly distributed as fine particles in a film-forming binder carried on a transparent or opaque support. When the writing liquid is applied to the opaque layer using a suitable writing instrument, such as a pen, the opaque layer immediately becomes transparent where it is contacted with the solvent.

Abstract: A lacquer coating composition containing a crosslinked vinylidene chloride polymer microgel powder which is recovered from a latex obtained by emulsion polymerizing about 85 to 92 parts by weight of vinylidene chloride, about 8 to 15 parts by weight of a copolymerizable ethylenically unsaturated comonomer, and a minor amount of a copolymerizable crosslinking polyfuntional comonomer. Coatings prepared from such lacquers have excellent barrier and heat-sealing properties.