BS ISO 4660:2020

This standard BS ISO 4660:2020 Rubber, raw natural. Colour index test is classified in these ICS categories:

• 83.040.10 Latex and raw rubber

This document specifies two methods to determine the colour of raw natural rubber according to a standard colour scale:

1. Method A: colour matching against standard coloured glasses;

2. Method B: colour determination using colour spectrophotometer.

In case of dispute, the preferred method is Method B.