How to mix joint mixture

1. Use clean tap water to mix joint mixture powder. No other material is allowed to be added. Water from river, well, waste water or any other source with impurities is not allowed. Otherwise the color of joint mixture would be polluted. 

2. Mixing container must be clean as well.

3. Mixing ratio of water and powder is about 1:4

4. Way of mixing: Pour most water into container and then slowing add gap filling agent. Stir it and add the rest of water and gap filler. Stir it throughly until it comes in appropriate softness.

5. Make sure to use the same mixing ratio for the whole project so as to reduce chromatic aberration.