Kaolin code KS-221 is one of the codes related to Kobud Kemer mine, this code has the largest reserve and depot among all the products in use from both mines with a reserve of half a million tons and a depot of one hundred thousand tons in It is currently being used in various industries. The color of the lump of this code is cream to yellow and the color of its powder is creamy white.

KS-221 code has a very high adaptability to different needs in industries, now this code is used in 90% of Isfahan brick factories to produce refractory bricks in cream to chamotte colors, as well as in agricultural industries. And the production of poisons, this code is being used by different companies, and the research in the field of knowledge-based companies related to the collection continues on the various properties of this kaolin.

Acid test : no reaction 

coefficient of thermal expansion :76

Reset mesh230:1.2

Soil hardness :mostly hard

Color before baking :cream 

Color after baking :white to chamotte

Furnace temperature :1155C

Furnace cycle :65Min

Dry strenght:20.35

Dry shrinkage :0.67

Curing strenght :454

Baking shrinkage :6.5

Heat wave :4.6

Water absorption :8.3

Slurry viscosity :16

Slurry density :1.60