Quantitative colour test based on Farnsworth D-15. The diameter of the stimulus is 3.3 cm and can be reduced by use of restriction rings to of 1.2 cm. Travel tube comes with black cloth. Good-Lite: 260260
This is the laminated version of the Hardy Rand Rittler Test (4th edition). HRR colour test with 20 plates. This book includes 4 demonstration plates, 6 plates for Screening, 14 plates to diagnose color deficiency.
The HRR is available from stock and will be shipped within 24 hours.