IS 5921-8: Metal-clad Base Materials for Printed Circuits for Use in Electronic and Telecommunication Equipment, Part 8: Flexible Copper-clad Polyster (PETP) Film Bureau of Indian Standards
IS 5921-3: Metal-Clad Base Materials for Printed Circuits for Use in Electronic and Telecommunication Equipment, Part 3: Phenolic Cellulose Paper Copper-Clad Laminated Sheet PF-CP-Cu (High Electric Grade) Bureau of Indian Standards
IS 5921-10: Metal clad base materials for printed circuits for use in electronic and telecommunication equipment, Part 10: Epoxide non-woven/glass reinforced/woven copper-clad laminated sheet of defined flammability(VBT) Bureau of Indian Standards