This standard specifies the color determination method of liquid unsaturated polyester resin in platinum-cobalt color units. This standard applies to the color determination of liquid unsaturated polyester resins whose color characteristics (referring to yellow or yellowish-brown hue) are close to those of the comparison platinum-cobalt standard liquid.
GB/T 7193.7-1992 history
2014GB/T 24148.8-2014 Plastics.Unsaturated polyester resin.Part 8:Determination of color using platinum-cobalt colormetric method
1992GB/T 7193.7-1992 Test method for colour of liquid unsaturated polyester resin
GB/T 7193.7-1992 Test method for colour of liquid unsaturated polyester resin was changed to GB/T 24148.8-2014 Plastics.Unsaturated polyester resin.Part 8:Determination of color using platinum-cobalt colormetric method.