Moisture vapor barrier coating method

Claim 2

The process of claim 1 wherein said top lacquer composition includes a wax in an amount of up to about 20 percent by weight.

Claim 3

The process of claim 1 wherein said top lacquer composition includes a drying agent in an amount up to about 10 percent by weight and an anti-oxidant in an amount up to about 10 percent by weight, said anti-oxidant being capable of volatilizing during the printing process.

Claim 4

The process of claim 2 wherein the ultra-violet stabilizer is epoxidized soybean oil, tin maleate, calcium maleate, or barium maleate.

Claim 5

The process of claim 5 wherein said primer composition contains a wax which is soluble in the primer solvent below the boiling point of said solvent and up to 100*C, said wax being present in amount of up to about 15 percent by weight.

Claim 6

A process of making a moisture resistant packaging material, said process comprising the successive steps of a. applying to a paper base material having printed matter on one side thereof, on the same side as the printed matter, using a gravure cylinder, a solvent solution of a primer coating composition consisting essentially of at least 50 percent by weight, based on the weight of the dry primer composition, of vinylidene chloride, a wax in an amount of up to about 15 percent and a stabilizer of epoxidized soybean oil or tin maleate; b. drying the primer-coated paper; c. applying thereto, using a gravure cylinder, over the primer composition a top lacquer composition comprising at least 70 percent of a cyclized natural rubber, based on the weight of the dry top lacquer components, a solvent therefor, a wax in an amount up to about 20 percent by weight, a drying agent in an amount up to about 10 percent by weight, and a volatile anti-oxidant in an amount up to about 10 percent by weight.