PDF Standards IEC 61249-2-44 Ed. 1.0 b:2016
Materials for printed boards and other interconnecting structures – Part 2-44: Reinforced base materials clad and unclad – Non-halogenated epoxide non-woven/woven E-glass reinforced laminate sheets of defined flammability (vertical burning test), copper-clad for lead-free assembly
standard by International Electrotechnical Commission, 05/12/2016