Kaolin code KS-281 is one of the codes related to Kobudkamer mine. This code is one of the newest codes in operation of the mine and was originally named as KS-232 code, which is known by this name in some factories.

After the initial impressions and analysis and firing test, it was found that this code has structural iron and its color is naturally dark gray to black, the color of the brick of this code is also dark red to black, and it is used to produce refractory bricks with black color. Without the need to add a high percentage of manganese, it is being used in brick factories.

SiO2 : 59.98

Al2O3 : 15.36

Fe t : 12.95 

MgO : 1.29 

K2O : 1.44

Na2O : 0.12

CaO : 0.54

TiO2: 0.44

P2O5 : 0.14

SO3: 0.74

LOI : 6.50