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Post by Jugglerguy on Aug 15, 2017 19:10:07 GMT -5
can still be washed off. I'm making more stuff with my wet grinder. I'm not making a bowl, but rather than describe what I am making, let's assume that it's a bowl. I want to cut the bottom flat. I use a laser level and mark a line around the bottom so I know where to cut to. This time, I used a sharpie to mark my line and planned to grind down to the line. The cup wheel was chipping a little, so I switched to a 30 grit polishing pad. I'm past the chipping, but I still have more to grind to get rid of my line. I tried washing it off with rubbing alcohol, but that didn't work at all. I have to make a similar cut on this same rock and I don't want to repeat this problem. I need to mark with something that will not be washed off with plain water. I want to mark on a part of the rock that will stay natural, it won't be polished at all. Pencil has been hard for me to remove in similar situations. Crayon seems like it would be hard to remove from rough rock. Chalk would wash right off while using the wet grinder. Any other ideas?
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Post by spiceman on Aug 15, 2017 19:20:10 GMT -5
Try WD 40
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unclesoska
freely admits to licking rocks
All those jade boulders tossed in search of gold!
Member since February 2011
Posts: 934
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Post by unclesoska on Aug 15, 2017 19:21:53 GMT -5
White out?
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Post by coloradocliff on Aug 15, 2017 19:32:21 GMT -5
Rob Any way you can find something with iron in it to mark and then use iron out to remove it after your work? How about Vaseline mixed with food coloring. The sharpies made in China with their poor quality ink can be cleaned off nursery tags made of plastic with cheap hair spray. Also the sharpies fade to nothing in the sun in a few months. Mask it off with masking tape and soak it off. Soap stone might be a consideration. Welders use it all the time. Clear shipping tape is real sticky and outline on that then remove the tape. Thought the last one you did turned out well. Making wigglinrocks a cereal bowl for Christmas? School starting back up real soon? Sorry...
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Post by wigglinrocks on Aug 15, 2017 19:40:10 GMT -5
Would acetone remove the sharpie mark ?
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Post by orrum on Aug 15, 2017 19:43:03 GMT -5
Sharpie will also sometimes get into the texture of the rock. I have seen good old fashioned lead pencil work well. Also see paper white out pens used.
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Post by Pat on Aug 15, 2017 20:32:42 GMT -5
You can use an aluminum or a brass pencil like we do for cabs sometimes. That won't wash off.
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Post by coloradocliff on Aug 15, 2017 20:40:07 GMT -5
You can use an aluminum or a brass pencil like we do for cabs sometimes. That won't wash off. Looks like we have a winner !!!!
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Post by aDave on Aug 15, 2017 20:45:56 GMT -5
Jugglerguy Rob, both my answers were addressed by wigglinrocks and Pat. I was going to suggest acetone for the sharpie. Seems I recall having success with it before, but I don't recall how porous the surface was. Was also going to suggest the metal pencils. I certainly don't cab, but I've watched folks use those for marking their slabs. Seems to hold up very well. Whatever you do, good luck. Dave
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Post by Jugglerguy on Aug 15, 2017 21:25:01 GMT -5
I just tried acetone and it had no effect. I will try hairspray and maybe WD-40 tomorrow. I'm a little afraid to try WD-40 because it's a white rock and I don't want to stain it.
I have an aluminum pencil, but I need it tow wash off, so that's no good.
The tape idea is interesting, but there's a lot of water involved and I would also have to saw through it. I can't imagine it holding up to all that.
White out is a thought, but hard to apply. Not sure how easy it comes off either.
Does anyone know how to remove pencil? I've had trouble removing it in the past, although I don't know if it was from rock.
Right now, my plan is to try more sharpie removers tomorrow.
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Post by Pat on Aug 15, 2017 21:31:54 GMT -5
To remove pencil; Artists use an eraser that is moldable. No back and forth movement. Place it on the desired area, press in, peel off. A little like play dough.
Re the aluminum pencil, I figured you would be sanding and/or polishing that area. That would obliterate the marking.
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Post by parfive on Aug 16, 2017 0:08:01 GMT -5
Instead of grinding to the line, why not just remove it?
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Deleted
Deleted Member
Member since January 1970
Posts: 0
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Post by Deleted on Aug 16, 2017 0:29:15 GMT -5
For preforms, I agree with an aluminum pencil (you can also use a bit of aluminum wire, which is cheaper). The outline will sand off when you final shape and sand the cab.
The sharpie can stain porous materials, including some agate, and I've had a few pieces where it just doesn't come off with rubbing alcohol. I knew one lapidary who liked paint pens from the craft store. They come in a fairly fine line. Didn't penetrate the surface and would chip off easily (or dissolve with acetone), yet resisted water while grinding.
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Post by radio on Aug 16, 2017 6:15:15 GMT -5
I've heard that to remove Sharpie ink on a smooth surface, one can go over the marks with a dry erase marker, then wipe off. If the surface is rough, try one part baking soda to one part toothpaste and scrub with an old toothbrush
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Post by Jugglerguy on Aug 16, 2017 6:23:28 GMT -5
Instead of grinding to the line, why not just remove it? That's the problem, I can't remove the sharpie line.
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Post by Jugglerguy on Aug 16, 2017 6:24:28 GMT -5
I've heard that to remove Sharpie ink on a smooth surface, one can go over the marks with a dry erase marker, then wipe off. If the surface is rough, try one part baking soda to one part toothpaste and scrub with an old toothbrush I'll try both of those, but I think the sharpie has soaked into the rock too much,
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Post by Jugglerguy on Aug 16, 2017 6:30:38 GMT -5
Here's the rock I'm working on. It will set on the flat side that is away from the camera. The other sides will be natural. I already have the bottom the way I want it, and I am grinding just to remove the line. I've probably already ground on it for about an hour just to get to the line. I probably have another half hour to go. Finding a way to remove the line in the future would save a lot of time. Pat, I'm going to see if I can find one of the erasers you mentioned, I'll test it one a scrap of rock. @rocks2dust, I'm also going to pick up a paint pen to try, I didn't realize that wouldn't soak in. If I can remove it with acetone, that will be perfect.
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Post by captbob on Aug 16, 2017 9:55:40 GMT -5
Rob, it may wash off, but may hold enough to do what you need ... how about trying chalk?
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Post by Jugglerguy on Aug 16, 2017 9:59:14 GMT -5
Rob, it may wash off, but may hold enough to do what you need ... how about trying chalk? Nope, I thought of that, but I'm using way, way too much water,
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Post by Jugglerguy on Aug 16, 2017 10:08:47 GMT -5
No luck with baking soda and toothpaste or hair spray, but the rocks teeth are clean and its hair won't blow in the wind,
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