Emery paper grades

Different countries have different systems for specifying the grit size of abrasive papers. Does anyone have a comparison chart for the grades of emery paper ?

Emery papers are sometimes graded by grit size in microns and labeled as 80 grit, 120 grit, 320 grit, etc. but I have seen grades of emery paper with numbers and letters (1, 2, 3, F, FF, FFF, etc).

What are the equivalent of these in grit size ?

Hi Paul,

where I live we use grit sizes like 80, 120, 320 ... as you mention. For comparison of other ways of labelling emery paper, may be this site is what you were looking for?

Regards

Thor

Edited By Thor on 23/04/2013 06:00:40

Thanks Tho,

I live in Australia and we use the 80, 120, 320... grit system. I have seen emrery cloth advertised on ebay which refers to "Faithful Blue Emery Cloth Roll 59m x 50mm x F", "Faithful Blue Emery Cloth Roll 59m x 50mm x FF", "Faithful Blue Emery Cloth Roll 59m x 50mm x 1", "Faithful Blue Emery Cloth Roll 59m x 50mm x 2". etc. I assume that the last letter refers to the grade of paper but I do not know what it means. The ebay sight is in the UK.

Number grit sizes are numbers of grains per inch.

It would be interesting to know how surface roughness (ra) relates to grit size, although as you use emery it blunts and clogs so the finish imporves.

Joey.

I know that the grit size is the number of grains per inch but what does grade F, FF, 1,2,3, etc. refer to ?

just google "ff grit size" lots of tables come up.