There  are  three  types  of  marble  abrasive  which  are magnesia  type,  colophony  type and 5 Extra  for polishing. The magnesia abrasive is made from high- quality magnesia, Silicon Carbide with different thick- ness and ratio as well as other compounds,used to achieve good planeness by removing the kerf in marble slabs made by saw blades. The  colophony  type  is  made from  synthetic  resin  and  silicon carbide of  high acutance, used to abrade visible scratch and give certain polish to the slabs.The 5 Extra is made from high quality alumina and polishing materials under high pressure treatment, used for mirror polishing and embell- ishment. Together with colophony abrasives, it can reach perfect result without any scratches or defects.

Granularity:

The granularity of our products meets the ISO8486 standard.

The specifications are 0#, 1#, 2#, 3#, 4#, 320#, 3/4F, 400#, 4F, 600#, 800#, 1000#, 2000#, and 5 Extra (polishing material), which can be classified to the following groups:
Rough abrasion: 0# - 4#
Medium abrasion: 320# - 400#
Refined abrasion: 600# - 2000#
5 Extra: different composition is to be applied to different stones

Application:

Compared with granite, marble processing requires stricter techniques due to its own features. No impu- rities harder than stones is allowed to mix when preparing  raw  materials  or  during  the  production  of abrasive.  The pureness  and PH  value of cooling water has to meet  the  requirement. The difference of chemical composition and hardness of marbles demands accordingly designed composition and combin- ation and sequence of abrasive, which  is  the  guarantee of  top operation  speed  of polishing machines  and  the best processing effects to the stones that include not only invisible scratch and burn in slabs, but  also ideal polish and embellishment. To completely eliminate scratches, the scratches  produced  by  the  same specification of abrasive  have  to  remove  those  produced  by  less refined abrasive used earlier before finer  abrasive  to  be applied with  reasonable  combination of  abrasive, speed of  belt,  speed  of  swing and  pressure  of  abrasive  heads. Otherwise,  the  scratches  can  not  be  eliminated  in  the next  procedures. To  avoid  burn, correct  press- ure of abrasive heads and flow of cooling water have to be chosen. The glossiness is depend on the material quality priorly. While an ideal glossiness to each  stone can also be  achieved  by  a correct  combnation  of  abrasive  and  technical parameters.  Based  on  the  polishing  mechanism to marble, the perfect combination of  Extra 5  plus  cleaning  is designed which produce excell- ent polishing performance and long term mirror effect.

Generally speaking, the processing of high quality marble requires good abrasives and skillful operators.