This International Standard specifies methods of measuring, under defined conditions, the gel time at ambient temperature (i.e. within the range 18 ℃ to 30 ℃) of unsaturated-polyester resins. The referee temperature, if needed, is 25 ℃.
BS EN ISO 2535:2002 history
2002BS EN ISO 2535:2002 Plastics - Unsaturated polyester resins - Measurement of gel time at ambient temperature