Search found 1022 matches
- Thu Feb 08, 2018 6:57 am
- Forum: Techniques and Tools
- Topic: Puzzled....
- Replies: 2
- Views: 5579
Re: Puzzled....
Many people don't realize that the air temperature in the kiln isn't necessarily the same as the glass temperature. The glass temperature is affected by conduction to the mold, convection with the air and radiative coupling to the elements. You're not going to change the air or the mold, so the only...
- Sun Feb 04, 2018 12:02 pm
- Forum: Techniques and Tools
- Topic: thicker and thinner together- ok?
- Replies: 13
- Views: 23029
Re: thicker and thinner together- ok?
The rule of thumb is twice the diameter of the hole from the edge of the hole to the edge of the glass or a minimum of twice the thickness of the glass. I also found a reference to 6 diameters from the corner of the glass. I think your dimensions are very conservative and should work fine. Support y...
- Thu Nov 30, 2017 6:52 am
- Forum: Newcomer Forum
- Topic: Sand mold for IN the kiln
- Replies: 6
- Views: 15607
Re: Sand mold for IN the kiln
Some of the thread talks about hot casting. Then Bert talks about his experience kilncasting: "Many years later, I was taught how to kilncast with sand. That lesson used 20% dry plaster mixed with the sand. I have switched to 25% alumina hydrate, because it lasts longer for me. I reuse my sand ...
- Tue Nov 28, 2017 6:46 am
- Forum: Newcomer Forum
- Topic: Sand mold for IN the kiln
- Replies: 6
- Views: 15607
Re: Sand mold for IN the kiln
This thread from the archives should be helpful.
http://www.warmglass.com/phpBB3/viewtop ... ld#p346214
Tony
http://www.warmglass.com/phpBB3/viewtop ... ld#p346214
Tony
- Sat Aug 19, 2017 9:40 am
- Forum: Newcomer Forum
- Topic: squares iout of circles
- Replies: 6
- Views: 11652
Re: squares iout of circles
Jim, Its 0.707 x diameter So if you have a 10" diameter, 10" is the hypotenuse or long side of the square Pythagorean theorem says the square of the hypotenuse of a right triangle equals the sum of the squares of the other sides so, a^2 + b^2 = c^2 c=10, so 10 ^2 = 100 Since a square has e...
- Wed Aug 16, 2017 8:14 am
- Forum: Techniques and Tools
- Topic: Firing Top and Sides, etc
- Replies: 6
- Views: 11082
Re: Firing Top and Sides, etc
The first thing I would do with just a mold or shelf in the kiln, is to measure the max temperature with just the top elements and then just the side elements. Those will be the limiting cases for your testing going forward. I expect you won't get to slumping temperature with just the lid element, s...
- Fri Aug 04, 2017 6:22 am
- Forum: Techniques and Tools
- Topic: Adding Switch To RTC-1000
- Replies: 10
- Views: 14376
Re: Adding Switch To RTC-1000
It's interesting that Olympic is using a single zone of a three-zone controller and wiring all three relays in parallel. I suppose it would allow them to use a single-zone controller without having to change the wiring. To answer your questions, one element has a higher resistance because it is long...
- Wed Aug 02, 2017 8:39 pm
- Forum: Techniques and Tools
- Topic: Gasoline-Powereed Sandblasting Compressor Comparisons
- Replies: 9
- Views: 17280
Re: Gasoline-Powereed Sandblasting Compressor Comparisons
Not exactly... by cycling more frequently, the gas-powered compressor will keep up with the demand, which is your main concern. This doesn't impact compressor life as much as you might think... going from empty to full pressure is way more stressful on a compressor than varying the pressure from 90 ...
- Wed Aug 02, 2017 5:37 am
- Forum: Techniques and Tools
- Topic: Gasoline-Powereed Sandblasting Compressor Comparisons
- Replies: 9
- Views: 17280
Re: Gasoline-Powereed Sandblasting Compressor Comparisons
For their size, gas powered compressors have way more flow than electric, but because they're portable, they have smaller tanks resulting in less reserve capacity. That said, SCFM at pressure is the indicator that you need to evaluate. Depending on your sandblasting setup, you may see some pressure ...
- Wed Aug 02, 2017 5:28 am
- Forum: Techniques and Tools
- Topic: Adding Switch To RTC-1000
- Replies: 10
- Views: 14376
Re: Adding Switch To RTC-1000
It depends if both side relays are wired together as a single zone or if they operate independently. Either way, a DPST toggle switch will do the job. Break one control line on one side of the switch and break the other on the other side of the switch.
Tony
Tony
- Tue Aug 01, 2017 5:52 am
- Forum: Techniques and Tools
- Topic: Adding Switch To RTC-1000
- Replies: 10
- Views: 14376
Re: Adding Switch To RTC-1000
The RTC-1000 technical manual is on the Bartlett website. http://www.bartinst.com/kilns/2 On page 5 of the manual is an illustration showing the outputs from the board to the relays. This controller will run three zones. I expect your kiln only has two zones - top and side. To turn off the side elem...
- Mon Jul 31, 2017 6:08 am
- Forum: Techniques and Tools
- Topic: Adding Switch To RTC-1000
- Replies: 10
- Views: 14376
Re: Adding Switch To RTC-1000
It's easy to add two switches, one to control the top (on or off) and another to control side (on or off). It's more of a challenge to combine the two because you need three positions: top; side; and both. You could order a double pole, triple throw switch, they're just not readily available at your...
- Fri Jun 30, 2017 5:14 am
- Forum: Newcomer Forum
- Topic: coefficient of expansion
- Replies: 2
- Views: 6266
Re: coefficient of expansion
It's written in scientific notation. In our world, just read it as 115 +/- 3 or 112 - 118 if you like. It's a much more precise way of writing 115.
Tony
Tony
- Mon May 15, 2017 5:05 am
- Forum: Techniques and Tools
- Topic: Spectrum System 96
- Replies: 6
- Views: 10710
Re: Spectrum System 96
Yup. That's what I meant, and why most people ask which side is up.jim simmons wrote:Tony.
By "contamination" I assume that you mean the tin left by the float process.
The other Jim
Tony
- Mon May 08, 2017 7:13 am
- Forum: Techniques and Tools
- Topic: Spectrum System 96
- Replies: 6
- Views: 10710
Re: Spectrum System 96
Jim is right, but keep in mind that art glass isn't like float glass which has one side "contaminated" by the float process.
Tony
Tony
- Fri Apr 21, 2017 5:34 am
- Forum: Art, philosophy, and content
- Topic: Ever put foil between two pieces of painted glass? Did you know someone has a patent on that?
- Replies: 9
- Views: 34630
Re: Ever put foil between two pieces of painted glass? Did you know someone has a patent on that?
I'm pretty sure applying micas to the surface of glass was also patented.
Tony
Tony
- Wed Apr 19, 2017 5:32 am
- Forum: Techniques and Tools
- Topic: Polarizing film
- Replies: 11
- Views: 15374
Re: Polarizing film
If you bothered to read Jim's reply before being rude to him, you would have understood that he WAS talking about the Rosco product you asked about. Yes, the Rosco film will work. You can use a piece on the light source and another to look through. Jim's suggestion was to use the Rosco film on a lig...
- Sat Mar 04, 2017 9:26 am
- Forum: Techniques and Tools
- Topic: metalic stains after blasting
- Replies: 6
- Views: 10272
Re: metalic stains after blasting
Peter,
Check out Sculpt Nouveau. http://www.sculptnouveau.com
They have a YouTube page as well.
They have patinas and base finishes for all materials that replicate many different oxides.
Tony
Check out Sculpt Nouveau. http://www.sculptnouveau.com
They have a YouTube page as well.
They have patinas and base finishes for all materials that replicate many different oxides.
Tony
- Thu Feb 16, 2017 6:42 am
- Forum: Techniques and Tools
- Topic: stencils for sanblasting - photoresist or vinyl cutter
- Replies: 27
- Views: 60685
Re: stencils for sanblasting - photoresist or vinyl cutter
Seachange, You are correct. The entire sheet would be taped and transferred prior to weeding. The second question gets back to the tack discussion. Larger pieces are much easier to weed off the backing sheet than off glass since the adhesive does stick quite well to glass. Paint mask is a great way ...
- Tue Feb 14, 2017 7:00 am
- Forum: Techniques and Tools
- Topic: stencils for sanblasting - photoresist or vinyl cutter
- Replies: 27
- Views: 60685
Re: stencils for sanblasting - photoresist or vinyl cutter
Seachange, I agree that photoresist is child's play. But it has some detractors that you're already aware of. I haven't found any benefit to using clear transfer tape. I have 6", 12" and 24" rolls of plain old transfer tape (picture light weight masking tape) on the racks and use whic...