Cement mortar have a higher requirements ,150,000 Viscosity will be better .
The most important role of HPMC is water retention ,and then thickening .
For putty powder ,we need pay more attention on the water retention property In the condition of Viscosity lower than 100thousand ,the viscosity is larger, the relative water retention is better, but when the viscosity is more than 100 thousand, the influence of viscosity on the water retention is a little .
