method to distinguish between calcium sulfate(gypsum)——calcium sulfate water-washing sop
source:leixin gypsum time:2017-07-07 09:53:53 reading times:1791
efficiently, quickly and easily distinguish between sensory differences on calcium sulfate(gypsum) products.
apply to all calcium sulfate(gypsum) products.
(test whiteness, smell, impurity, fineness)
1 take 10g calcium sulfate, pour it on a piece of a4 paper, judge the whiteness from the appearance;
2 add 100ml water in a clean 300ml beaker. pour 10g calcium sulfate in the beaker, rotation the beaker 10 seconds cover with aluminum foil paper (note: the powder in water);
3 remove the cover and smell the mixture, looking for characteristic smell or bad smell (such as rotten eggs smell, musty, oil, chalk, hot metal);
4 stir the mixture clockwise evenly with a glass rod, while observation solution surface and the bottom of the beaker is whether exists presence of impurities and foreign body; uniform mixing for 10 seconds clockwise and then immediately stop; observe the layering of the mixture.
1whiteness: the whiteness is higher, the corresponding content is higher. if you want the content is 98%, whiteness must to be 95! the whiteness of qualified product is whiter than a4 printing paper.
2 smell: the good quality of calcium sulfate solution is no peculiar smell, but the poor quality solution will be like a rotten egg smell, musty, oil, chalk, the peculiar smell of the hot metal.
3 impurity: the bottom impurity of calcium sulfate solution is less, the content is greater.
4 fineness: the layered of calcium sulfate solution is slower, the fineness is more fine-grained.
to be the best calcium sulfate supplier of the world!
—— leixin gypsum