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Crack repair

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Crack repair

Postby mksanders2020 » Fri Mar 08, 2019 3:25 pm

I accidentally tapped my finished bowl with the air hose nozzle, causing a chip in the rim and a 3" hairline crack. The blank consisted of 2 layers of 2mm Reactive Cloud Opal, fused, slumped into a shallow mold, slumped into a deeper mold, draped over the mold (inverted), then cold worked. It was as close to perfection as I've ever achieved... until I chipped it! I'm thinking of draping it again over the same inverted mold using a standard full-fuse schedule (with a slow ramp of 100 degrees per hour) in the hope that the crack will seal up. What do you think? If that is successful, I could then deal with the chip in a number of ways.
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Re: Crack repair

Postby beachwalkerboxes » Fri Mar 08, 2019 3:33 pm

If you filled the chip with frit, encased the piece in investment, and took it to casting temp, it would surely seal the crack, and mitigate the chip. Downside: investment is expensive and it would be a long firing schedule. How big is the bowl? If it's fairly small this would work. If it's big then not so much.
At least you didn't drop it. I achieved perfection in a cast piece, then spent hours polishing and etching it, then shattered it into smithereens.
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Re: Crack repair

Postby mksanders2020 » Fri Mar 08, 2019 3:35 pm

Photos attached.
Attachments
chippedbowl.jpg
chippedbowl.jpg (47.36 KiB) Viewed 1049 times
IMG_0408.jpg
IMG_0408.jpg (106.56 KiB) Viewed 1049 times
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Re: Crack repair

Postby mksanders2020 » Fri Mar 08, 2019 3:39 pm

I'm not as concerned about the chip. I can grind it off and modify the shape of the rim. It's the crack I'm most concerned about.
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Re: Crack repair

Postby marykaynitchie » Mon Mar 11, 2019 3:09 pm

I don't think that can be fixed unless you fully fire it flat onto a kiln shelf and re-slump it. I don't think that the slumping temperature will be high enough to heal the crack.

Such a pretty vessel!

Mary Kay
Mary Kay Nitchie
Bullseye Glass Co.

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Re: Crack repair

Postby martykremer » Thu Mar 14, 2019 1:08 pm

You won't get that flat without wrinkles and folds. Time for damage control- encourage the crack until you have 2 pieces, clean up the edges and slump into shallow plates/bowls. Then make another one.
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