- Joined
- Feb 2, 2013
- Messages
- 3,538
I can’t say for tombstone, but i have checked countertop granite- it failed when blued up on my A plateHmmmmm....
That is exactly what I was suspecting. A new plate was probably fairly well cleaned after manufacturing but there must be still some dust, particles and whatnot on it.
So this has to go somehow. I did not know about using amonia on granite.
Also while on the subject, a 'B toolroom grade" plate is surfaced to 0,0002" which is is about twenty times better than my abbility at machining right now! I will buy one from a machine tool distributor, I 'need' the comfort of buying something certified, but just out of curiosity, how flat are the granite found at countertop or toombstone fabricator ?
Also, again out of curiosity, I had some belgian, french and austrian colleagues at one point or another in my career and contrary to us north-american as where we refer to a 'surface plate, or a 'granite', they refered to a 'marble plate' or simply a 'marble'
Is it just because granite is more common in America, and marble more comon in Europe, or this is just a semantic quirp?
Luc
It’s better than the garage floor but not precision by any stretch .