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...Tyler Frisby's devit post got me to thinkin' about experimenting further. To this end I dirtied up a 19" glass disk and positioned it over a 2 tiered drape mold. I soaked the piece at 1325 for 15 minutes, then ramped it up to 1350 for 5 minutes. Afterward, I let it cool slowly to the annealing point(no crashing)...



...I must admit to liking the silvery iredescent sheen. It doesn't look anything like the "scummy white residue" mentioned in all the books. It accents the glass folds quite nicely, I almost hate to throw the piece in the garbage.

Skin_Mechanic wrote:... I almost hate to throw the piece in the garbage.

Why throw it away? I'm with you, I like the silvery affect AND the shape. It's a keeper if you ask me. Surely you know someone who'd love to receive as a gift, it at the verrrrrry least! And of course, you remember my birthday is right around the corner....

What do you mean you "dirtied" it up??

Skin_Mechanic wrote: I almost hate to throw the piece in the garbage.

Don't then

Dirtied it up is my PC lingo for smearing the glass down with armpit sweat, then throwing some trash on it that I had swept off the garage floor... Sounds disgusting for sure... but you asked

Skin_Mechanic wrote:...Tyler Frisby's devit post got me to thinkin' about experimenting further. To this end I dirtied up a 19" glass disk and positioned it over a 2 tiered drape mold. I soaked the piece at 1325 for 15 minutes, then ramped it up to 1350 for 5 minutes. Afterward, I let it cool slowly to the annealing point(no crashing)...

...I must admit to liking the silvery iredescent sheen. It doesn't look anything like the "scummy white residue" mentioned in all the books. It accents the glass folds quite nicely, I almost hate to throw the piece in the garbage.

It's cool, nice piece! I would think it's not devit but tin bloom. Did you fire tin side up?.

The tin side was down on this one, or would that be in I've looked at it more closely since I took that pic. There are several places where the crystals had radiated out from the center of a dirt grain, like a snowflake, and a stray finger print here and there. At this point I'm wondering if it was the dirt, sweat, deodorant, or a combination of the 3 Repeating the experiment again is a must, to insure consistant results.

Do not throw away. Send to me. Admittedly it has an odd shape to it, but I have perfect spot for it as garden sculpture, near my newly daylighted water feature (spring that is now outside instead of in my basement).

Dayle Ann

Joseph - you bad boy!!! Why didn't you post those pictures

Would the aluminum in the deoderant have any strange effects?

I'm wondering exactly the same thing: If the aluminum in the deodorant(Degree) was the catalyst for the crystallization. When I get home from work tomorrow I'm gonna drape a vase, smearing the glass with the deodorant(no sweat or dirt). I'll post a pic of the finished results.

I soo pleased to inspire, hmm very nice slump you have have !

I dont know if I would call that devit. It's looks like more of a hase than a Crystalization. I've slumped some temperd candle holders and got that effect its real sweet.

My attemps on Getting devit all failed, the devit gods are agains me this month. Hope he likes the warm weather in the summer to come out and play , lol

Hello,

You need to go well over the softening point in order to get a remarkable devit, that is, over 1346°F and for a long period of time. I would say around 1600°F by (at least) half an hour, a dirty piece helps too. But devit is a playful and treacherous animal. Brian is the specialist, amazing pieces.

Below softening point, viscosity prevents crystals and nucleous from grow.

On the other hand, tin bloom appears on the tin side of float glass when tin oxide changes valence (from a low oxide combination to a higher one). The new combination needs more room, then the solution is a microscopical surface folding which we see as tin bloom. This phenomena is increased when tin side is compressed during slumping.

Hugo Gavarini wrote:
On the other hand, tin bloom appears on the tin side of float glass when tin oxide changes valence (from a low oxide combination to a higher one). The new combination needs more room, then the solution is a microscopical surface folding which we see as tin bloom. This phenomena is increased when tin side is compressed during slumping.

That is interesting Hugo. I recently fired a 2 layer bowl with tin sides up and down. the top surface got the frosted look on the second(slump) firing even though it had been boraxed on the first (fuse) firing.

I am more used to identifying tim bloom as the lacy look on the bottom where the glass has stretched and the bloom is only were the tin was on the surface.