Colormetric tube

Precautions:

1. The colorimetric tube is not a test tube and cannot be heated. The wall of the colorimetric tube is thin, so handle it with care.

2. Colorimetric tubes of the same specification should be used in the same colorimetric experiment.

3. When cleaning the colorimetric tube, do not use a hard-bristled brush to clean it.

Avoid abrading the tube wall and affecting the light transmittance.

4. When comparing colors, only two colorimetric tubes should be compared at a time and the lighting conditions should be the same.