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Guide to fusing, slumping, and related kilnforming techniques

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by Brad Walker
Fri Dec 07, 2018 9:25 am
Forum: Techniques and Tools
Topic: colourless glue
Replies: 8
Views: 2216

Re: colourless glue

Marty wrote:Check on the cure time- last I used it I left it for a week undisturbed.


Hxtal takes a week to cure. You can speed it up with heat (say, undisturbed under a hot kiln), but that still takes 3 or 4 days.
by Brad Walker
Mon Nov 05, 2018 1:31 pm
Forum: Techniques and Tools
Topic: Stainless ring mold
Replies: 7
Views: 3648

Re: Stainless ring mold

Thicker will work fine.

Or just cut a hole in something like a piece of Ceramaguard and for a lot less money than stainless you'll have something that will work just as well.
by Brad Walker
Mon Nov 05, 2018 1:29 pm
Forum: Techniques and Tools
Topic: mold
Replies: 4
Views: 1938

Re: mold

Consider not using stainless. I have these kinds of things made from regular mild steel, as much as 1/4" thick and just cover the steel with thinfire paper before I use the mold. Works perfect, and any spalling is contained by the thinfire. I use a local metal fabricator. They're fairly easy to...
by Brad Walker
Thu Oct 04, 2018 8:36 am
Forum: Techniques and Tools
Topic: Wetbelt sander belts breaking
Replies: 10
Views: 3002

Re: Wetbelt sander belts breaking

Tony Smith wrote:Are these full-size belts or Covington size? I've never heard of belts coming apart, but I suppose it's possible as the glue hardens over time.


Full-size. I'd never heard of it either until it happened twice this past month.
by Brad Walker
Wed Oct 03, 2018 8:33 am
Forum: Techniques and Tools
Topic: Wetbelt sander belts breaking
Replies: 10
Views: 3002

Re: Wetbelt sander belts breaking

Funny you mention this, Greg. I had two split on me just a couple of weeks ago. Don't know why. The belts were purchased several years ago, so perhaps there's a shelf life issue. But I've never had the problem before.
by Brad Walker
Mon Oct 01, 2018 8:00 am
Forum: Techniques and Tools
Topic: fixing a crack on a tack fused/ slumped piece
Replies: 2
Views: 1378

Re: fixing a crack on a tack fused/ slumped piece

Looks to me like it was annealing, not necessarily thermal shock. Annealing cracks are typically S-shaped and don't go all the way through. Pieces with variations in thickness require a longer anneal than pieces that are smoother. But either way, you can fuse it flat to hide the crack with frit, etc...
by Brad Walker
Wed Sep 05, 2018 7:07 pm
Forum: Techniques and Tools
Topic: Tempered glass on float glass - rainbows?
Replies: 10
Views: 3175

Re: Tempered glass on float glass - rainbows?

Yes. I assume by "rainbows" you mean bright white areas of stress, usually around the corners of the pieces that are incompatible. Well, no, they are rainbow-colored. I think you can see them in the photo that I attached if you blow it up. They are just thin bands of rainbow around the ed...
by Brad Walker
Wed Sep 05, 2018 3:47 pm
Forum: Techniques and Tools
Topic: Tempered glass on float glass - rainbows?
Replies: 10
Views: 3175

Re: Tempered glass on float glass - rainbows?

I want to be sure I understood the rainbows. Rainbows showing in a polariscope indicate stress in the glass, so that would be where the glass MIGHT crack in the future. Am I correct about that? Yes. I assume by "rainbows" you mean bright white areas of stress, usually around the corners o...
by Brad Walker
Wed Sep 05, 2018 1:37 pm
Forum: Techniques and Tools
Topic: Tempered glass on float glass - rainbows?
Replies: 10
Views: 3175

Re: Tempered glass on float glass - rainbows?

The tales of exploding glass I've read online really scare me.... would love to know more about when / why that happens. I wouldn't necessarily believe everything you read about online, but basically there are four kinds of cracks: 1. Incompatibility, where the coefficient of expansion between two ...
by Brad Walker
Wed Sep 05, 2018 12:03 pm
Forum: Techniques and Tools
Topic: Tempered glass on float glass - rainbows?
Replies: 10
Views: 3175

Re: Tempered glass on float glass - rainbows?

It's almost certainly incompatibility. It's a good practice to only fuse float with itself, rather than fuse one piece of float with another. In time, the piece will probably crack further.
by Brad Walker
Mon Aug 13, 2018 3:04 pm
Forum: Techniques and Tools
Topic: Pottery Kiln Wash?
Replies: 4
Views: 1815

Re: Pottery Kiln Wash?

When we made pottery kiln wash in college, it was 50% EPK and 50% Alumna Hydrate. To make it more like glass kiln wash, you would have to add 20% to 30% Alumna Hydrate... right? I always did the opposite. More alumina hydrate, less EPK kaolin. That's a soft wash, doesn't usually stick, single use. ...
by Brad Walker
Sun Aug 05, 2018 9:54 pm
Forum: Techniques and Tools
Topic: out of the norm and need firing schedule
Replies: 9
Views: 3130

Re: out of the norm and need firing schedule

I am in need of a firing schedule for this, and am stumped. This base was a mistake that happened in a class I was taking (taking a few local classes to help me get my feet wet again). I thought it was really cool, though, and decided to use it for something. I can't lift this base layer at all, as...
by Brad Walker
Sat Aug 04, 2018 8:23 am
Forum: Techniques and Tools
Topic: Pottery Kiln Wash?
Replies: 4
Views: 1815

Re: Pottery Kiln Wash?

Will work, sometimes sticks to glass during fusing more than a kiln wash formulated for glass.

Should work fine for coating molds.
by Brad Walker
Mon Jul 30, 2018 1:57 pm
Forum: Techniques and Tools
Topic: Digitry GB-1 controller discussion
Replies: 11
Views: 2997

Re: Digitry GB-1 controller for sale

FusedLightStudio wrote:I’m curious, how do you program AFAP on these controllers?


My understanding is that you don't. You program how long it takes to get from one temperature to another. So there's no as fast as possible.
by Brad Walker
Tue Jul 17, 2018 1:12 pm
Forum: Techniques and Tools
Topic: replacement lid?
Replies: 2
Views: 1555

Re: replacement lid?

If you want a kiln like the one you have, just replacing the lid would be cheaper. Don't know how much, but Skutt could help. Or any place that sells their kilns.
by Brad Walker
Sat Jul 07, 2018 11:01 am
Forum: Board Help
Topic: Notifications
Replies: 1
Views: 1113

Re: Notifications

Not sure. I have mine on notification also, and it works fine. If you have the option to get an email when I reply to your post (that's a default option), you should get an email notifying you about this post. That will at least verify that it's not getting blocked by a filter along the way. If you ...
by Brad Walker
Fri Jul 06, 2018 10:04 am
Forum: Techniques and Tools
Topic: Iso-mag board
Replies: 8
Views: 2619

Re: Iso-mag board

Marty wrote:Pete is more irascible than Brad.


Guess I need to try harder.
by Brad Walker
Fri Jul 06, 2018 7:38 am
Forum: Techniques and Tools
Topic: Iso-mag board
Replies: 8
Views: 2619

Re: Iso-mag board

Buttercup wrote:Marty, what's Pete's board, please....another glass site?


http://talk.craftweb.com/forumdisplay.php?s=&forumid=4
by Brad Walker
Wed Jul 04, 2018 8:21 am
Forum: Techniques and Tools
Topic: Iso-mag board
Replies: 8
Views: 2619

Re: Iso-mag board

I'm interested in its machine-ability and whether it can take kiln wash. I've been having trouble with vermiculite board leaving a haze on the glass. Tried calcium silicate boards, they're prone to thermal shock, but perhaps this can work. Let me know what Jim says, if he can get it I can drive down...
by Brad Walker
Tue Jul 03, 2018 1:58 pm
Forum: Techniques and Tools
Topic: Iso-mag board
Replies: 8
Views: 2619

Re: Iso-mag board

Never heard of it, but it looks interesting. Let me know if you try it out or find out more.

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Warm Glass

2575 Old Glory Road, Suite 700
Suite 700
Clemmons, NC 27012
Phone: (336) 712 8003
Email: wg@warmglass.com

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