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Type of paper

A paper, resembling animal parchment, which is made by passing a waterleaf sheet prepared from cotton fibre and/or pure chemical pulps through a bath of sulphuric acid, after which the sheet is thoroughly washed and dried. The properties of the finished sheet are dependent upon the furnish, the paper making procedure used to make the waterleaf sheet, and the variations in the parchmentizing process. It is odourless and tasteless, either greaseproof or grease resistant and has high wet strength which is substantially maintained over a long period. It does not distintegrate in water or salt solutions either hot or cold and has high resistance to disintegration by many other solutions. The sheet may be softened by the use of plasticizers. It may be waxed, coated, embossed or crinkled. It has the following uses : (1) As a printing parchment, it is used for advertising bouchures greeting cards, letterheads, box liners, statinory etc. and may be printed by offset, letterpress, gravure, thermography die stamping or silk screen. (2) in various weights and degrees of translucency or opaqueness it is used in packaging in frozen, moist, greasy, or dry food products, such as; butter, margrine, dry pet food, meat and poultry; (3) as a carton liner for bake and serve goods; (4) as a pan liner (5) Translucent parchement is used for diazotype copymasters and (6) Special types are used as release paper and interleavers for the food, plastic, and rubber industries.

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