Colour Standard to ASTM C40, Gardner (1933) Disc, 5-steps, Comparator Discs
Organic Impurities in Fine Aggregates Disc (ASTM C 40), Organic Plate No. 1 - 5
- Easy to use, visual assessment of colour – simply rotate disc for colour match
- Glass fade-free standards for longevity of use
- Optional lighting units for guaranteed lighting conditions 24 hours a day
- Optional Nessleriser systems for longer path lengths
- Discs can be annually certified against master reference standards for continued peace of mind and accurate analysis.