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Tips, Techniques, and Questions -- Technical questions or tips |
2011-02-24, 8:51am
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Senior Member
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Trouble encasing "purple (CIM) colors?
Not a "clear" issue...it's just the purples...eggplant for example. Using it with a puffy press....cracks right down along the mandrel line. Compatability? It's only happing with those colors! Yikes!
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2011-02-24, 12:20pm
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dances with ideas...
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What is the base glass and what is the encasing layer?
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2011-02-24, 2:26pm
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rainbowchasingtimewaster
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Cracks down the mandrel line are almost always thermal cracks.
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2011-02-24, 3:01pm
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The base was CIM Eggplant, encased with Effetre/Moretti Super Clear...I also tried the same thing with Simple Berry (CIM). Both cracked pretty quick...right down the mandrel line.
I've been playing around trying to figure this out. I tried using Effetre/Moretti Violet as the base with a skinny layer of CIM Eggplant and then encased with Moretti Super Clear. Well, that seems to have worked. Made it at 7am.....out the kiln @ 1pm and I'm watching it like a hawk!!!!! So far so good. I'll keep watching them and say a prayer every time I approach!
I thought thermal crack too, but I kept those beads SMOKIN!!!! I couldn't have kept it any hotter.... ugh!
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2011-02-24, 3:05pm
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Quote:
Originally Posted by loribeads
Cracks down the mandrel line are almost always thermal cracks.
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Yep, but when Diamond Clear's first compatibility problem cropped up a few years ago, it was this same straight down the mandrel line cracks that were happening. Turns out it actually was compatibility. It sucks too, because it was almost a RULE that it was thermal in that case
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2011-02-24, 4:58pm
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And I also had a recent issue with an old batch I had of rubino that cracked down the mandrel line on some hearts I had been making. I also made black encased hearts and as it happens a CIM simply berry heart - that did not crack. I've been testing rubino replacements since (even made a rare blog post about it)!
I haven't tried encasing the eggplant.
I think compatibility cracks will sometimes crack along the line of least resistance - often the mandrel line on beads that have been pressed (the thinnest place?) ... mine was down the line where I had used the razor tool to cut the center of the heart (same idea as thinnest at that point).
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2011-02-24, 6:09pm
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Dark Flower Bead Art
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I have had a similar problem with all the CiM blues too. I love the CiM colors but as a rile I just don't encase them for that very (heartbreaking) reason. I favor lauscha reformuated so that might not help you there...sorry for your loss!
Cara
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2011-02-24, 7:21pm
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rainbowchasingtimewaster
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Quote:
Originally Posted by squid
Yep, but when Diamond Clear's first compatibility problem cropped up a few years ago, it was this same straight down the mandrel line cracks that were happening. Turns out it actually was compatibility. It sucks too, because it was almost a RULE that it was thermal in that case
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Oh poop.
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2011-02-24, 7:56pm
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I would try a more conservative annealing schedule or maybe a higher annealing temp. Usually with Lauscha when we bump up to 980 cracking issues end.
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2011-02-24, 8:14pm
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I had problems back when neo lavender came out from bullseye. I found that they had to be put into the kiln warmer than the moretti. Since then, no issues, although I can't say I've tried specifically encasing the cim purples.
Mary
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2011-02-24, 8:25pm
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I had a problem encasing kryptonite! Hey, hey Paulaaaa, I had my temp at 980 since I use some lauscha and it still cracked. Go figure, maybe it was just that once, I never tried it again! Ha ha, I move on pretty quickly! GAD (glass attention deficit)!
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2011-02-25, 12:15am
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To bead Yeah! ;)
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CIM Hefalump Does not like encasing!
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2011-02-25, 6:18am
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Well, my test bead....Effetre/Moretti base topped with a thin coating of Eggplant...and encased with Moretti Super Clear LIVES!!!!! YAY! No more encasing CIM's for me.... ((
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2011-02-25, 6:42am
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I have the same problem with CIM eggplant.
Not a pressed bead, a bicone. The base colour was made in different rainbow colours, each colour a big stripe and covered in Effetre clear.
I had cracks all over the eggplant part.
I tried it once again just eggplant covered with clear. And again, cracks all over.
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2011-02-25, 6:57am
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There is a whole long thread about CIM and how some of them need certain annealing temps. Could be that and/or compatibility.
Good luck!
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2011-02-25, 7:35am
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Formerly FishBulb
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I was going to say that too Merigypsy. Many of the CIM blues need to be annealed at around 1040 and perhaps the purples can be like that also.
There is also a thread in this section about the latest batch of Effetre Super Clear being incompatible with some glass.
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2011-02-25, 7:41am
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There was a thread on here from a couple of years ago and apparently the blues did need a different annealing temp, according to CIM. I'll try to find it.
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2011-02-25, 7:51am
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Formerly FishBulb
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Bah, can't find it, although all this searching for CIM blues has made me want to get back on the torch, pronto! Nom nom nom.
Katie Gee here on LE is the rep for CIM (I think) so if anyone has any questions about it you could always ask her. She's incredibly helpful.
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2011-02-25, 8:34am
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Formerly FishBulb
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Ah, thank you for that clarification Kandice!
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2011-02-25, 5:16pm
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dances with ideas...
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I've had no trouble with cirrus using my regular annealing schedule, and I use it pretty regularly.
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2011-02-25, 10:43pm
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My cirrus is of the original batch (love anything opalescent) ... can't say I've had any problems but it's good to know if I get some now it might be different?
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