It is designed to measure the color of the varnish ,thinner and other transparent liquids.

Take a certain amount of ferric chloride hydrochloric acid solution, potassium

dichromate sulphuric acid solution, and cobalt chlorite hydrochloric acid solution, The above three solutions will be mixed together at a certain percentage in order to get 18 solutions

with different colors and densities. Then put them into the tubes and sealed separately.

The visual method is used to assess via the comparison with a series of anvil standard

tone scale solution，which is marked with the color gradation number. The result is shown in1-18.

■ Colorless glass tube with the internal diameter of Φ10.75±0.05mm,and the height of 114±1mm.

■ Color comparison box(self-prepared)

■ The test must be taken at the temperature of 23±2℃

■ Ordering Information：BGD 420--- Iron-cobalt Color Comparison Tester