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Post by mcbryde on Jun 2, 2010 19:45:23 GMT -6
I was turning a deer antler pen this afternoon, and blew out the end of the barrel. I got the piece, and ca'd it back on, but the area around that spot turned yellowish in color, anyone know why this did this? Know how to prevent it, other than not blow the barrell up to begin with?
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monty
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Posts: 147
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Post by monty on Jun 2, 2010 19:47:51 GMT -6
I have no idea. I use CA as a sealer/finish on my antler all the time with no problems or color change.
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Doug B
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[b]Rescued Firewood[/b]
Posts: 1,938
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Post by Doug B on Jun 3, 2010 0:27:35 GMT -6
Me too. One of the great things about CA is that is stays clear. I use it a lot on antler and cannot remember any time that it gave me any problems like that. I have used some things to color it on purpose, like baking powder for white and Analine dye for black, but that was intentional.
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Post by boodrow on Jun 3, 2010 3:36:40 GMT -6
Em Im with the others , never had it happen to me.  Boodrow |
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Post by mcbryde on Jun 3, 2010 7:44:49 GMT -6
It didn't happen on the regular antler, just on the porous stuff where the antler blew out. Not sure if it got hotter there and burnt the antler and that discolored it, or what, I'll try to get a pic of it when I get home this evening. It is the first time I have had it happen too, but then again, this is only my 2nd antler pen.
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Doug B
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[b]Rescued Firewood[/b]
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Post by Doug B on Jun 3, 2010 9:09:02 GMT -6
Emerson, heat will discolor the antler like that...I noticed that when burning lines in it I would have to sand the surrounding areas to remove the discoloring that happens on both sides of a burn line. And the porous part of antler is going to show it the worst - it will pick up and retain color from sanding dust too if you are not careful.
That sounds like what might have happened to you - the antler discolored from heat or picked up some color from sandpaper or some other source of contamination. Probably has nothing to do with the CA other than the CA then makes that discoloring a very permanent part of the porous material.
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Post by mcbryde on Jun 6, 2010 23:53:26 GMT -6
I'm guessing that when the ca hit that real poroused part, it was hotter than the solid stuff, discoloring it.
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Doug B
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[b]Rescued Firewood[/b]
Posts: 1,938
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Post by Doug B on Jun 7, 2010 11:19:21 GMT -6
Sanding certainly can heat up the antler quite a lot. For antler, I turn it close to final shape using a roughing gouge, then switch to a skew turned on its side and used like a scraper. That leaves a very smooth surface that requires minimal sanding. Usually I go straight to Micro Mesh after the skew.
Then I make sure all sanding dust is cleaned off the antler before applying CA. I use aerosol accelerator to clean off the sanding dust, and it is pretty cool which may be cooling the antler down. I first apply a coat of thin CA with the lathe spinning at lowest speed, followed by 3 coats or so of medium CA also with the lathe spinning at lowest speed. After applying the each coat of CA, I use BLO to cure the CA while gradually increasing the speed of the lathe until almost full speed. This only takes a few seconds total time for each coat of CA.
Then I sand with Micro Mesh to get the CA real shiny, followed by a treatment of EEE polishing wax with the lathe spinning at close to full speed followed by buffing with a clean cloth with the lathe still spinning at close to full speed.
Anyway, that is the way I do antler and maybe something there could help you figure out how to prevent the yellowing.
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