Search found 212 matches
- Sun Nov 23, 2003 5:12 pm
- Forum: Techniques and Tools
- Topic: Perplexed.....need help (pics)
- Replies: 52
- Views: 43028
Lisa, I can't really tell from your photo, does the crack start at the interface of the black and clear, or in the black? Brock Brock It was hard to tell, it looked in both incidences of cracking that the cracks started at the interface of the opaque pink and the clear then at the interface of the ...
- Sun Nov 23, 2003 5:02 pm
- Forum: Techniques and Tools
- Topic: Perplexed.....need help (pics)
- Replies: 52
- Views: 43028
Lisa I think that you might have the understanding to figure out what happened. Look closely at where the cracks start and stop and where they go. This should give you a better clue as to why they started. The photo is helpful but maybe not as informative as a close visual examination. The only tro...
- Sun Nov 23, 2003 4:50 pm
- Forum: Techniques and Tools
- Topic: Perplexed.....need help (pics)
- Replies: 52
- Views: 43028
...I think that Lisa's problem is an incompatibility one. Cheers, Bob If it was incompatibility due to a COE shift from multiple firings, wouldn't you expect to see the cracks surround the incompatible color in more than one location and surround the color rather than shoot out in a single radiatin...
- Sun Nov 23, 2003 2:17 pm
- Forum: Techniques and Tools
- Topic: Perplexed.....need help (pics)
- Replies: 52
- Views: 43028
I might look at several areas that could be causing the problem. #1 was all the glass from the same stock sheets or were they mixed and thus have some subtle variation in compatibility. This is probably not the problem. #2 shift in COE from repeated firings. Probably not the problem. #3 sometimes k...
- Sun Nov 23, 2003 2:05 pm
- Forum: Techniques and Tools
- Topic: Perplexed.....need help (pics)
- Replies: 52
- Views: 43028
Re: pb's
Now :roll: ..I'm perplxed. Your initial firing schedule that you first mentined on this thread is different than the one you just gave with your response to me. Did you fire more than once? Initial firing then again for matte firing?..after sandblasting? Three firings in all. One to fire the slab, ...
- Sun Nov 23, 2003 1:28 am
- Forum: Techniques and Tools
- Topic: Perplexed.....need help (pics)
- Replies: 52
- Views: 43028
Lisa, I know you said your Denver holds the heat really well, but that is usually true for fiber kilns in the last 200 to 300 degrees. I would be more concerned with the temperature drop after your last hold at 700°. Controlling the temp drop to 450° at 100 dph would reduce any potential for ther...
- Sun Nov 23, 2003 1:24 am
- Forum: Techniques and Tools
- Topic: Perplexed.....need help (pics)
- Replies: 52
- Views: 43028
- Sun Nov 23, 2003 1:15 am
- Forum: Techniques and Tools
- Topic: Perplexed.....need help (pics)
- Replies: 52
- Views: 43028
Lisa, I think Bob Leatherbarrow used to do anneal soaks at both temps and has stopped doing that since having conversations at Bullseye (if I remember correctly). Ask him about it. Bob??? My heartfelt condeolences. I hate it when I can't figure out what is going wrong. Unfortunately I have no clues...
- Sat Nov 22, 2003 7:57 pm
- Forum: Techniques and Tools
- Topic: fiber board
- Replies: 1
- Views: 3062
Re: fiber board
Is the texture of fiberboard the same as a kiln shelf. I want to make a drop ring plate for an award and have never used fiberboard so I don't know what to expect as far as texture is concerned. Thanks Ann The answer is no, there is much more texture on fiberboard. One fix is to kilnwash the board,...
- Sat Nov 22, 2003 7:29 pm
- Forum: Techniques and Tools
- Topic: Perplexed.....need help (pics)
- Replies: 52
- Views: 43028
Nice piece Lisa, and sorry glass deities are demanding some kind of penance from you. Your schedule looks fine, and you can't over anneal, so that's not an issue. Like Brock, I'm puzzled that the first cracks healed at such a low temp. Not that I think this is related to the crack, but are you conf...
- Sat Nov 22, 2003 3:11 pm
- Forum: Techniques and Tools
- Topic: Perplexed.....need help (pics)
- Replies: 52
- Views: 43028
How bout this, since my pattern bars typically have both transparent and opaque, maybe a possible solution is to anneal with this in mind. The annealing point for opaque is 935 and for transparent is 990, so maybe a slow descent and hold at 990, 960 and 935 would solve the problem? I am going to sti...
- Sat Nov 22, 2003 2:03 pm
- Forum: Techniques and Tools
- Topic: Perplexed.....need help (pics)
- Replies: 52
- Views: 43028
- Sat Nov 22, 2003 12:48 pm
- Forum: Techniques and Tools
- Topic: Perplexed.....need help (pics)
- Replies: 52
- Views: 43028
Perplexed.....need help (pics)
Now I am totally perplexed! Here are pics of the piece that had the tiny fissures near the pink glass. I put it in last night for a matte finish on my new kiln shelf. Schedule was 150dph to 1170 hold 20 min 9999 to 960 hold 2 hrs 30 min 50dph to 700 no hold The cracks in the clear around the pink ar...
- Fri Nov 21, 2003 9:13 pm
- Forum: Techniques and Tools
- Topic: shelf paper dust
- Replies: 5
- Views: 5395
- Fri Nov 21, 2003 6:44 pm
- Forum: Techniques and Tools
- Topic: While we are on the topic of dust...
- Replies: 10
- Views: 11077
- Fri Nov 21, 2003 6:20 pm
- Forum: Techniques and Tools
- Topic: While we are on the topic of dust...
- Replies: 10
- Views: 11077
I always wear a mask when I am tilesawing, vacuuming up thinfire residue, rinsing pieces off that have thinfire stuck to them, sandblasting, mixing kilnwash.......but, then I take the mask off and I always wonder if there are particles floating around in the air that I can't see that are worming the...
- Thu Nov 20, 2003 11:20 pm
- Forum: Techniques and Tools
- Topic: Marking glass
- Replies: 22
- Views: 20018
- Thu Nov 20, 2003 11:03 pm
- Forum: Techniques and Tools
- Topic: strange cracks.......help
- Replies: 4
- Views: 5278
This reminds me of the problem I had earlier this year that we discussed on this thread: http://www.warmglass.com/cgi-bin/wgarchive3.pl?read=79181 The consensus was that is was an incompatibility related to the pinks and cranberries. Steve Well, that would make sense, because the fissures are in th...
- Thu Nov 20, 2003 10:55 pm
- Forum: Techniques and Tools
- Topic: BE pink kilnwash
- Replies: 28
- Views: 23081
- Thu Nov 20, 2003 10:10 pm
- Forum: Techniques and Tools
- Topic: BE pink kilnwash
- Replies: 28
- Views: 23081