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When emery sheets are used for polishing why the order is 220, 400, 600, 800, 1000 and not 1000, 800, 600, 400, 220? Answered

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Josehf Murchison
Josehf Murchison

Best Answer 4 years ago

The number is the number of grains of grit per square inch. Look at it like teeth on a saw blade. 220 grit is 220 teeth per inch, it removes a lot of material and cuts fast but leaves deep scratches. 1,000 grit is 1,000 teeth per inch and it removes very little material takes forever to make a cut, and leaves a polished surface.

So it works like this:

200 grit leaves deep scratches.

400 grit removes the deep scratches and leaves shallow scratches.

600 grit removes the shallow scratches and leaves fine scratches.

800 grit removes the fine scratches and leaves very fine scratches.

Last 1,000 removes the very fine scratches and leaves a polished surface.

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MUKULVYAS
MUKULVYAS

Answer 4 years ago

SIR, THANK YOU FOR ANSWERING MY QUESTION.

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Yonatan24
Yonatan24

4 years ago

Why not? What's the problem?

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YS Creations
YS Creations

4 years ago

Whilst the previous posters answers are correct, to be fair I will tell you the answer. The lower the number the more coarse the grit on the sandpaper. So you want to start with a more coarse grit to take more material off whatever it is you are sanding & work your way up to a finer grit to smooth out the result.

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Downunder35m
Downunder35m

4 years ago

Go to your neartest hardware store and check sandpaper.
Take a really close look and it should become very obvious why the order is going from low to hig and not the other way around.