Sand­pa­per

The Shed - - Sharpening -

The abra­sive par­ti­cles are glued to a sheet of pa­per, cloth, etc. to form sand­pa­per. My old wood­work teacher used to in­sist that sand­pa­per was called ‘glass­pa­per’, be­cause the abra­sive used back then was glass pow­der. To­day nei­ther glass nor sand (sil­ica) are found on sand­pa­per. In­stead, the fa­mil­iar sub­stances silicon car­bide, alu­minium ox­ide, and di­a­mond are used. As there is only one layer of abra­sive the sand­pa­per has a lim­ited life — the abra­sive par­ti­cles be­ing bro­ken or detached from the back­ing rel­a­tively quickly. On the other hand, sand­pa­per is cheap and flex­i­ble. An ef­fec­tive and in­ex­pen­sive (though short­lived) whet­stone can be made by tap­ing sand­pa­per to a flat base.

A Stan­ley 60½ plane cut­ter in an Eclipse 36 sharp­en­ing jig

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