The effect of water / powder ratio and pouring time on accuracy and dimensional stability of alginate impressions

藻酸盐印模材料 水粉 比及印模放置时间对模型精度的影响

The effect of water / powder ratio on accuracy and hardness of die stone models

超硬石膏 材料 水粉 比对模型精度和表面硬度的影响

When water / powder ratio was 7.5 ∶ 1 and the content of fine powder was 35 % slurry fluidity was better and initial setting time and setting time were appropriate .

当 粉 液 比为7.5∶1、粉料占耐火材料的35%时，浆料有较好的流动性和适宜的初终凝时间。