| Modern Grit Number Designation | Old "Sandpaper" Designation | Modern Grit Number Designation | Old "Sandpaper" Designation |
| 600 | 100 | 2/0 | |
| 500 | 80 | 1/0 | |
| 400 | 60 | 1/2 | |
| 360 | 10/0 | 50 | 1 |
| 320 | 9/0 | 40 | 1-1/2 |
| 280 | 8/0 | 36 | 2 |
| 240 | 7/0 | 30 | 1-1/2 |
| 220 | 6/0 | 24 | 3 |
| 180 | 5/0 | 20 | 3-1/2 |
| 150 | 4/0 | 16 | 4 |
| 120 | 3/0 | 12 | 4-1/2 |
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Head Office
Graha Indah Block C4/12 Pondok Gede, Bekasi 17422 - West Java Indonesia +62 21 847 2918
Branch Office
> Gempol Citra Asri Block I/28 Pasuruan East Java Indonesia +62 819 3848 4837
> Perumahan Griya Argo Kencana 41 Kel, Candirejo - Ungaran Semarang Central Java Indonesia +62 811 541 351
Graha Indah Block C4/12 Pondok Gede, Bekasi 17422 - West Java Indonesia +62 21 847 2918
Branch Office
> Gempol Citra Asri Block I/28 Pasuruan East Java Indonesia +62 819 3848 4837
> Perumahan Griya Argo Kencana 41 Kel, Candirejo - Ungaran Semarang Central Java Indonesia +62 811 541 351
| · | Mounted Flap Wheels - Gp1 |
| · | Flap Discs - Gp2 |
| · | Flap Wheels Un-mounted - Gp3 |
| · | Grinding/Radial Wheels - Gp4 |
| · | Flexible Discs - Gp5 |
Silicon Carbide - is shiny black in color. It is very sharp, practically as hard as diamond, and brittle. It fractures into new cutting points during use. It is best suited for very hard or very soft materials. It is preferred for titanium, rubber, leather and similar materials and for finishing and rubbing .lacquers and enamels. It is also well suited for hard plastics.
Flint - is actually quartz. It is white in color, and used commonly by the home craftsman.
Emery - is dull black in color. It is a very hard grit and round in shape. Used widely for polishing. This is a natural form of Aluminum Oxide.
Garnet - is a reddish brown abrasive. Due to its medium hardness and relative sharpness, it is widely used in the woodworking industries.
Crocus - is a deep brown or maroon abrasive. It is very soft, and is used primarily in polishing soft metals.
Mineral Grading Grits: There are a total of twenty-two different grain particle sizes (grits) ranging from No. 12 (the coarsest) to No. 600 (the finest). The grit comparison chart will show the breakdown of these grits.
2. COATED ABRASIVES - BACKINGS
The backings used in the manufacturing of coated abrasive products are classified into four basic groups:
1) Cloth,
2) Paper,
3) Fiber and
4) Combination.
These four backings are further subdivided as follows:
1. Cloth
"J" Weight (Jeans)- light weight and flexible - used mostly for finishing and fine polishing.
"X” Weight (Drills) - heavier, more durable and stronger than '"J" weight - recommended for medium and heavy-duty work.
2. Paper
"A" Weight - lightest and most flexible of the papers - used primarily for finishing operations.
"C" and "D” Weights - intermediate weights which are stronger but less flexible - used for hand sanding and for oscillating machine sanding.
”E” Weight - strongest, most durable and least flexible. Has the most resistance to tear and is used primarily for mechanical sanding.
3. Fiber
Made from impregnated paper which has been condensed and hardened. Fiber is tough, strong, hard and able to withstand heat used for discs and drum sanding.
4. Combination
Paper and Cloth laminated together and used on high speed drum sanders and for floor sanding.
Fiber and Cloth laminated together and used for discs.