1.1 This standard prescribes requirements and methods of sampling and test for bitumen-laminated waterproof paper for general packaging.
2. TYPES
2.1 Bitumen-laminated waterproof packaging paper shall be of the following three types:
a) Type 1 — Waterproof paper comprising two plies of kraft paper laminated with bitumen,
Type 2 — Waterproof paper comprising two plies of draft paper laminated with bitumen and reinforced with jute or cotton yarns placed 25 to 30 mm apart,
Type 3 — Waterproof paper comprising one ply of hessian cloth and one of kraft paper, laminated with bitumen.
IS 1398-1982 history
1983IS 1398-1982 Specification for waterproof bituminous laminated wrapping paper