Base materials for printed circuits; part 2: specifications; specification No. 7: phenolic cellulose paper copper-clad laminated sheet of defined flammability (vertical burning test)
Gives the requirements for properties of base material of defined flammability in thicknesses of 0.5 mm up to 3.2 mm. Specifies the requirements for material and construction, internal marking, electrical and non-electrical properties of the copper-clad