This standard specifies methods of measuring, under defined conditions, the gel time at ambient temperature (i.e. within the range 18°C to 30°C) of unsaturated-polyester resins. The referee temperature, if needed, is 25 °C.
DS/EN ISO 2535:2003 history
2003DS/EN ISO 2535:2003 Plastics - Unsaturated polyester resins - Measurement of gel time at ambient temperature