What properties of the grains affect the quality of abrasive paper?

What properties of the grains affect the quality of abrasive paper?

1.Grain types: Different types of grains have different applicability and pertinence. In this case, choosing the right grains is very important. Apply good grains to poor quality material sanding and this might not show the good performance of the good grains. Therefore, to choose the correct and economical grains for the right work piece is very important.

2.Strength of the Grains: The strength of the grains has a huge effect on abrasive cloth and heavy-weight abrasive paper. There are obvious effects on medium and high density fiberboards. For light-weight abrasive belts and hand-sanding abrasive paper, there are not that many effects.

3.Self-sharpening of the grain: The grain will break itself during working and form a new angle. In this case, it can improve its sharpness. The self-sharpening depends on the variety and processing method of the grains.

4.Grain shape: Grains in acicular or flake shapes will be sharper but not wear resistant while equivalent shapes not that sharp but wear resistant.

5.Correctness of the grit: The quality of the grains has a great deal with grit. P100 grains are sharper than P120. Normally abrasive paper in grit P120 will use P120 grains. But some factories will use P100 grain. Therefore, judging the quality of the abrasive paper should be on the basis of same grit.

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Automobile Manufacturing Process----Bus Painting

Cleaning ----Spray Primer----Sanding Putty----Spray Primer----Spray Surface Coat----Decoration

Automobile Manufacturing Process----Car Painting

Cleaning ----Phosphating Treatment----Electrophoretic Primer----Coat Sealing Glue---Spray Primer----Spray Surface Coat

How to choose abrasive paper?


How to choose abrasive cloth?


Stock Store Guideline

1. Enter Stock Store: http://www.sunabrasives.com.cn/store.asp


Stock Store Guideline
2. To find out your inquired item, such as: Brown Aluminum Oxide, click the category: Abrasive Grain.


Stock Store Guideline

3. Select the grit nos.\ quantity \ destination. Please note that our standard package is 25KG/bag, so if you want to order 1000KG of F46, type in “40” in the quantity box. If your destination is not in the list, pls choose:Finally, click “Add in cart”.

Stock Store Guideline


4. Check your order in the Cart, you can DELETE or REVISE here.


Stock Store Guideline

5. If there is no problem, you can Check Out to fill your detail information and choose payment terms, we accept PayPAL and T/T.


Stock Store Guideline

Items in stock

BP62 with factory brand “GOLDENSUN”

EK85 with factory brand “SHUANGFENG”

BM85 with factory brand “GOLDENSUN”

EN85 with factory brand “GOLDENSUN”

EJ85 with factory brand “GOLDENSUN”

BV86B with factory brand “GOLDENSUN”

DP86B with factory brand “GOLDENSUN”

EW91 with factory brand “GOLDENSUN”

DI26 with Neutral stock

EU26 with Neutral stock

DH85 with Neutral stock

Why abrasive paper rolls are not cheaper than sheets?

Is it that rolls require no cutting thus has no waste? In this case, isn’t it cheaper than sheets? The answer is no, reasons as follow:

1.The packed rolls have paper tubes, which is not cheap.

2.There might be defects during production such as scratches and factory has to cut off the whole area where defects appear. During sheets production, the cut area can be still cut into sheets except those defects. 

Therefore, rolls have higher cost than sheets.

How to analyze the quality of the abrasive paper with your eyes?

1. See whether the paper pretreatment is good or not. Bad pretreated abrasive paper has black dots on the back side when backlighted. This kind of abrasive paper will be brittle and has poor waterproofness.

2. See whether the grain side is smooth or not and with too much bond or not.

If the grain side is with too much bond, it feels not sharp since the bond has fully covered the grains. And also the grain side will be shiny when it is with too much bond.

3.See whether there are coarse particles or abnormal bulges on the grain side. These will damage the workpieces during sanding.