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by Bert Weiss
Sun Jan 05, 2020 4:49 pm
Forum: Techniques and Tools
Topic: Fiber Kiln/Shelf
Replies: 7
Views: 979

Re: Fiber Kiln/Shelf

I have a new all-fiber kiln including the shelf. I have heard so much 'noise' about whether or not you can fire directly on the kiln washed fiber shelf OR you should use thin fire, I'm don't know how to proceed. Would really appreciate some advice. Thanks! I agree that kilnwash is problematic. Perh...
by Bert Weiss
Sun Jan 05, 2020 4:46 pm
Forum: Techniques and Tools
Topic: Adhesive Question
Replies: 7
Views: 1276

Re: Adhesive Question

Try Hang Your Glass. Used properly it should provide a bond stronger than the glass.

Or trying heating the Hyxtal a bit to make it set up quicker.
by Bert Weiss
Thu Sep 05, 2019 8:22 pm
Forum: Newcomer Forum
Topic: ridigizer with fiberboard
Replies: 4
Views: 2592

Re: ridigizer with fiberboard

There are 2 kinds of rigidizer, colloidal silica and colloidal alumina. Silica tends to land on the surface and sticks to glass (often the pink stuff). Alumina is probably what the boards are made with in the first place (green stuff as I’ve seen it). I sinks in and doesn’t stick to glass as much. B...
by Bert Weiss
Mon Jul 08, 2019 3:45 pm
Forum: Techniques and Tools
Topic: SSR question
Replies: 17
Views: 4803

Re: SSR question

A simple rule is always give at least an 80% margin. So a 36 amp draw would need at least 45 amp relay. 50 amp relays are quite common and inexpensive. I recently got burned buying Chinese relays. They came with recommended light weight heatsinks. I had a fire, that luckily I could blow out with my ...
by Bert Weiss
Fri Apr 26, 2019 12:26 am
Forum: Techniques and Tools
Topic: SSR question
Replies: 17
Views: 4803

Re: SSR question

It is always a good idea to work within 80% of capacity only for wires, breakers, and relays. Putting 36 Amps through a 50 amp rated relay is probably how I’d go, but splitting them up is good too. In larger kilns, I always use 3 zones with 3 thermocouples, because the middle zone is always hotter t...
by Bert Weiss
Fri Apr 26, 2019 12:20 am
Forum: Techniques and Tools
Topic: kiln controller question
Replies: 15
Views: 3972

Re: kiln controller question

Thanks Bert, I think that I am going to wire a single female to the controller and switch out thermocouple lines when I need to. I am going to use a low voltage toggles to switch signal voltage lines but I would be worried about doing the same thing with the thermocouple lines where current accurac...
by Bert Weiss
Thu Apr 25, 2019 9:39 pm
Forum: Techniques and Tools
Topic: kiln controller question
Replies: 15
Views: 3972

Re: kiln controller question

I’ve done pretty long runs of thermocouple wire with no issues.

The idea of one outlet wired to the controller and plug either one in to run it is the simplest approach I know of. This can be hard wired with some sort of knife switch or something so you can divert the power to one side or the other.
by Bert Weiss
Sun Mar 03, 2019 2:39 am
Forum: Art, philosophy, and content
Topic: Shout out to Doc Steve Immerman & Richard Parrish
Replies: 0
Views: 3834

Shout out to Doc Steve Immerman & Richard Parrish

I am visiting Chicago, and popped in to a craft gallery when I saw Doc Steve’s work in the window. Always a pleasure to see it in person. My surprise in the gallery was some new work by Richard Parrish. I’ll comment that I have seen many pictures, but in person his pieces really shimmer with nuanced...
by Bert Weiss
Sun Mar 03, 2019 2:25 am
Forum: Techniques and Tools
Topic: kiln elements
Replies: 8
Views: 4449

Re: kiln elements

Jolly, yes you can shorten elements to get them to glow hotter. They will draw more wattage and more amperage. I would consult with Duralite. They can make you new coils designed with an exact amperage and watts per cubic foot inside your kiln. Meanwhile, I would make sure you don’t have a relay stu...
by Bert Weiss
Tue Feb 19, 2019 1:30 pm
Forum: Newcomer Forum
Topic: I need castable mould materials to melt plate glass into a disc.
Replies: 36
Views: 13552

Re: I need castable mould materials to melt plate glass into a disc.

Aaron, your knowledge of glass is sorely lacking. You continually make wrong statements. Answering them all is book length. If you can purchase what you want for $75, I advise you to do so, unless you would rather spend $75,000 learning about glass. Tempered glass never breaks in 2 pieces. 2,000 is ...
by Bert Weiss
Thu Feb 14, 2019 12:15 pm
Forum: Newcomer Forum
Topic: I need castable mould materials to melt plate glass into a disc.
Replies: 36
Views: 13552

Re: I need castable mould materials to melt plate glass into a disc.

Schott likely has heavier tougher bricks that stay about the same temp in their flow through set up. As for the temperature their shelf/mould can handle, their shelf is molten tin. I can not copy them. While SCHOTT does make float glass, their optical casting glasses are not float. I believe HIS gl...
by Bert Weiss
Thu Feb 14, 2019 12:13 pm
Forum: Newcomer Forum
Topic: I need castable mould materials to melt plate glass into a disc.
Replies: 36
Views: 13552

Re: I need castable mould materials to melt plate glass into a disc.

I found the name for dental stone. Hydrocal. Melting temp is 2650 F, but upper working temp is 900 F. I wonder why it does not work higher. Remember that mold and glass must be compatible. That means that the glass would need a higher expansion coefficient so it will shrink more on cooling. Otherwi...
by Bert Weiss
Wed Feb 13, 2019 8:59 pm
Forum: Newcomer Forum
Topic: I need castable mould materials to melt plate glass into a disc.
Replies: 36
Views: 13552

Re: I need castable mould materials to melt plate glass into a disc.

I found the name for dental stone. Hydrocal. Melting temp is 2650 F, but upper working temp is 900 F. I wonder why it does not work higher. Plaster has 2 kinds of water in it, the water you mix it with and chemically bonded water. Both need to exit the mold. Solid Hydrocal, will just crack. So you ...
by Bert Weiss
Tue Feb 12, 2019 7:04 pm
Forum: Newcomer Forum
Topic: I need castable mould materials to melt plate glass into a disc.
Replies: 36
Views: 13552

Re: I need castable mould materials to melt plate glass into a disc.

WoW You are in for an extremely steep learning curve. First of all, float glass has a relatively high melting point. Second, refractory molds don’t fare well above 1400ºF. Third you will never get bubble free stacking glass. You would do best starting out with a piece of glass thicker than you want ...
by Bert Weiss
Thu Jan 24, 2019 10:10 am
Forum: Techniques and Tools
Topic: irritating news
Replies: 11
Views: 5042

Re: irritating news

Nice table Bert. It is underneath all the stuff they are selling. Barn board pattern shows well despite all the stuff sitting on top of it. https://homeplushome.com/ Odd Kevin. You describe the table. Your link is for my guy but at a different location. I don’t see the picture you reference. I’m so...
by Bert Weiss
Mon Jan 14, 2019 4:45 pm
Forum: Techniques and Tools
Topic: irritating news
Replies: 11
Views: 5042

Re: irritating news

Welcome back, friend. Glad you';re on the mend! I'm in week 5 after hip replacement and doing well too. I finished and shipped out two commissions the day before surgery, and during recovery dreamed up all kinds of new pieces. Do report on your new works. Nikki, after my surgery, I had a large impo...
by Bert Weiss
Sat Jan 12, 2019 12:44 pm
Forum: Techniques and Tools
Topic: irritating news
Replies: 11
Views: 5042

irritating news

I haven't been around for a while, but this news came across my screen this morning. This was the factory I visited decades ago, where I was taken to lunch with 5 industry experts who let me pick their brains. Years later, they told me that my advocacy for using colors designed for ceramics on glass...
by Bert Weiss
Tue Feb 06, 2018 11:19 am
Forum: Techniques and Tools
Topic: thicker and thinner together- ok?
Replies: 13
Views: 6332

Re: thicker and thinner together- ok?

Bonnie

I consider successful drilling to be a successful annealing test. If there are internal stresses, drilling will find them.

Bert
by Bert Weiss
Sat Jul 01, 2017 11:06 pm
Forum: Techniques and Tools
Topic: The load bearing capacity of glass - to bear its own weight
Replies: 10
Views: 6293

Re: The load bearing capacity of glass - to bear its own weight

by Bert Weiss
Wed May 31, 2017 10:27 am
Forum: Techniques and Tools
Topic: Is my compressor pooched?
Replies: 8
Views: 7938

Re: Is my compressor pooched?

Thanks Jen. I do miss the banter we had here, as it was a unique set of people who came together over the common theme of english speaking kiln fired glassies. These days there is plenty of banter over on Facebook. Rosanna and I responded to a political comment by Barry just a couple of days ago. I ...

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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