|
Post by mohs on Jan 31, 2009 20:17:15 GMT -5
I blue a stone when I’m trying to create a flat parallel grind for gluing 2 stones together. Well I was rough cabbing and wondered would how it would work on the surface of the stone? So I painted the surface of the stone with a black Sharpie marker. It made it very easy to see the dips and those dam nit scratches while working under the wheel. No drying the stone off for inspection. That gets old. Don’t think it’ll work for the later finishing. Dry and inspect is probably the only way to go at that stage. But it worked well while rough grinding.
edmostly
|
|
|
Post by akansan on Feb 1, 2009 10:21:32 GMT -5
A common test is a simple X or * on the cab - If you remove the X, then the grind is good!
|
|
|
Post by mohs on Feb 1, 2009 14:58:24 GMT -5
I like the X marks the spot! I was just out there doing some finishing sanding and the method may have worked to well. OOOO it was difficult getting that pernament marker out those fine dam nit scratches. Well that a good thing, actually. Accomplishished a fairly fine finish and very little dry and inspect.
|
|
drjo
fully equipped rock polisher
Honduran Opal & DIY Nut
Member since May 2008
Posts: 1,581
|
Post by drjo on Feb 1, 2009 15:22:23 GMT -5
Thanks for posting the tip deeptime, it's amazing the things we do automatically and take for granted the everybody knows.
2 extra points on the coolometer.
When I do it, I use a large carpenters pencil and draw a crosshatch on course grinds and just cover the stone on finer passes. Comes off easier than markers (I've had them stain the stone).
Dr Joe
.
|
|
Shelbeeray
has rocks in the head
Member since January 2006
Posts: 688
|
Post by Shelbeeray on Feb 5, 2009 2:42:59 GMT -5
I never thought of doing that - WONDERFUL tip. Thanks.
|
|
mirkaba
spending too much on rocks
Member since August 2006
Posts: 321
|
Post by mirkaba on Feb 5, 2009 12:52:06 GMT -5
I keep a drawer full of Sharpies handy. Different colors and nib sizes. I can usually mark out the bad places down to 400 grit with no problem. Watch out for porous and vuggy rock. If the ink stains very deep it does not come out. I also use a sharpie to mark the divots and wows on the sc grinding wheels when I am truing them............Bob
|
|
|
Post by mohs on Feb 5, 2009 15:48:56 GMT -5
I really liked dr joes idea. Using a graphic pencil. I could see how staining could become a problem.
|
|
|
Post by Hard Rock Cafe on Feb 9, 2009 12:23:43 GMT -5
You should be able to remove Sharpie stains by soaking in alcohol if you get it within a few hours, or acetone if it's been longer.
Chuck
|
|