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Posted by Ed Huntress on April 13, 2008, 11:55 pm
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> On Sun, 13 Apr 2008 13:34:16 -0400, with neither quill nor qualm, "Ed
>
>>
>>>I have recently acquired some Carborundum/Silicon Carbide in 1 lb. jars.
>>> The labels indicate:
>>>
>>> 1F RA
>>> 2F RA
>>> 180 GG
>>> 220 RA
>>> 400 RA
>>>
>>> The last 3 are pretty straightforward, but what do the first 2 mean and
>>> what does the RA/GG indicate? Any knowledge of possible grit sizes in
>>> microns? These jars were manufactured by the Canadian Carborundum
>>> Company
>>> of Niagara Falls, Canada (the cheap electricity?).
>>> Mike in BC
>>
>>Scroll to near the bottom:
>>
>>http://www.metalfinishingsystems.com/tt-abrasive.html
>>
>>'Dunno about the GG and RA.
>
> Are those Canuckistani for "Gritty Gunk" and "Raggedy Ass", perhaps?
> <chortle>
...in which Larry takes a little leak into the reservoir of human
knowledge...
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> The labels indicate:
>
> 1F RA
> 2F RA
> 180 GG
> 220 RA
> 400 RA
>
> The last 3 are pretty straightforward, but what do the first 2 mean and
> what does the RA/GG indicate? Any knowledge of possible grit sizes in
> microns? These jars were manufactured by the Canadian Carborundum Company
> of Niagara Falls, Canada (the cheap electricity?).
> Mike in BC