Devit sprays

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Liam
Posts: 90
Joined: Sun Mar 09, 2003 10:25 pm
Location: Houston, TX

Devit sprays

Post by Liam »

I usually use Borax, but I am doing some low temp slumping of stained glass for bent lamp panels. Borax doesn't seem to mature properly for me at these temps. I seem to remember that spray-A and superspray had different maturing temps. Does anyone know about this?
Liam
Bert Weiss
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Re: Devit sprays

Post by Bert Weiss »

Liam wrote:I usually use Borax, but I am doing some low temp slumping of stained glass for bent lamp panels. Borax doesn't seem to mature properly for me at these temps. I seem to remember that spray-A and superspray had different maturing temps. Does anyone know about this?
Liam
Liam

The sprays you mentioned all mature around 1400ºF, I believe. There are a couple of lower temp, high lead sprays. One is back magic. I have yet to hear anybody say that it was actually good for anything on this board. I think there might be one more in the middle that works for that app. Wissmach devits when you think about too hard.

I just looked at the Fusion HQ link on the sponsor links and Gil says that the hi temp overglazes mature at 1350. He also sells a bending overglaze that he says works at 1100. I'd try that. Let us know how it works for you.
Bert

Bert Weiss Art Glass*
http://www.customartglass.com
Furniture Lighting Sculpture Tableware
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gone

Re: Devit sprays

Post by gone »

Liam wrote:I usually use Borax, but I am doing some low temp slumping of stained glass for bent lamp panels. Borax doesn't seem to mature properly for me at these temps. I seem to remember that spray-A and superspray had different maturing temps. Does anyone know about this?
Liam
Hi Liam,

Are you sure you'll really need an overglaze at those low temps?

Els
Vic
Posts: 23
Joined: Mon Mar 10, 2003 7:01 pm
Location: NYC

Post by Vic »

I've used the bending glaze on Wissmach and Kokomo "honey-beige" glass. It works OK, but the glass looks a bit like plastic. It's not the same shine as the glass.
Liam
Posts: 90
Joined: Sun Mar 09, 2003 10:25 pm
Location: Houston, TX

Post by Liam »

Thanks vic, I want to replicate old glass, and not change the appearance. Yes a good devit spray would be nice as I am using glass that loves to devit badly, in particlular Kokomo K11. I would bet half of the lamps Ive seen needing repair have that glass. The trick is going very fast to avoid devit, but I'm afraid if I go to fast I will break my hydroperm mold. I'm getting about a 50% success rate now on devit and I am taking all the cleaning precautions.


Liam
Vic
Posts: 23
Joined: Mon Mar 10, 2003 7:01 pm
Location: NYC

Post by Vic »

I make my lamp molds from "castalite" by A.P. Green 201-589-5855.
I'll bet you can't break this mold material.
BobbieMatus
Posts: 50
Joined: Tue Jul 08, 2003 12:21 am

Post by BobbieMatus »

I have used kokomo k11 for fusing, I used the superspray on it and it fused very nicely.
Bobbie
Bert Weiss
Posts: 2339
Joined: Tue Mar 11, 2003 12:06 am
Location: Chatham NH
Contact:

Post by Bert Weiss »

Liam wrote:Thanks vic, I want to replicate old glass, and not change the appearance. Yes a good devit spray would be nice as I am using glass that loves to devit badly, in particlular Kokomo K11. I would bet half of the lamps Ive seen needing repair have that glass. The trick is going very fast to avoid devit, but I'm afraid if I go to fast I will break my hydroperm mold. I'm getting about a 50% success rate now on devit and I am taking all the cleaning precautions.


Liam
Liam if you whip your hydroperm right, it should take firing fast.

Zircar makes a wet felt that can make molds that will fire infinitely fast, pricey though. 845-651-2200
Bert

Bert Weiss Art Glass*
http://www.customartglass.com
Furniture Lighting Sculpture Tableware
Architectural Commissions
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