Search found 118 matches

by Warren Weiss
Fri Aug 23, 2013 12:57 pm
Forum: Techniques and Tools
Topic: Chart for temperature + time = same results
Replies: 8
Views: 9374

Re: Chart for temperature + time = same results

As Bert said, each kiln, mold and glass is different. If you use the same set up you could run a series at different temps to an observed "full slump." You can than generate a graph (curve) for each. The area under the curve is heat work. You can than use calculus to measure the area under...
by Warren Weiss
Tue Aug 20, 2013 7:30 pm
Forum: Techniques and Tools
Topic: Vitrograph Cane
Replies: 9
Views: 10254

Re: Vitrograph Cane

Thanks Cynthia and Cheryl. That is what I suspected was happening. The more I think about it, the more I like the idea of boxing in the squares with stainless steel. There will be no air in the pack and colors and change overs will be in register. Also, squares are a lot faster to cut than circles a...
by Warren Weiss
Tue Aug 20, 2013 1:48 pm
Forum: Techniques and Tools
Topic: Vitrograph Cane
Replies: 9
Views: 10254

Re: Vitrograph Cane

Thanks. I think the "trick" is making the circles larger to match the slope of the pot. It might work if I stack uniform size squares and then place 4 stainless steel plates to "box in" the squares. That would cut the capacity of the pot, but would keep the color sequences and de...
by Warren Weiss
Tue Aug 20, 2013 7:25 am
Forum: Techniques and Tools
Topic: Vitrograph Cane
Replies: 9
Views: 10254

Re: Vitrograph Cane

Hi,
Stacking straight up. As the pot diameter increases toward the top, there is much more side space near the top. The squares are uniform in size.
Thanx,
Warren
by Warren Weiss
Mon Aug 19, 2013 7:57 pm
Forum: Techniques and Tools
Topic: Vitrograph Cane
Replies: 9
Views: 10254

Vitrograph Cane

Yesterday I pulled cane from my vitrograph kiln for the first time. About the last 50 % came out hollow. I used a 6" d x 4 1/2" high clay pot with the hole reamed to 1/2". I used my Paragon kiln controller to set the temp. at 1650 F. The pot was filled with a stack of about 2" sq...
by Warren Weiss
Wed May 22, 2013 4:21 pm
Forum: Photos and Stuff
Topic: Drop Ring Vessel
Replies: 9
Views: 12195

Re: Drop Ring Vessel

Stacey,
Lovely work. What was the diameter of the hole in your drop ring? Thanks.
Warren
by Warren Weiss
Mon May 20, 2013 10:48 am
Forum: Techniques and Tools
Topic: Spilt glass
Replies: 18
Views: 20036

Re: Spilt glass

Thermal shock on the way up. Try 200 dph to 1100 then 400 to 1480. No benefit of 30 min hold at 1240.
Warren
by Warren Weiss
Tue Apr 30, 2013 6:47 pm
Forum: Techniques and Tools
Topic: Flat Lap vs Hand Held
Replies: 8
Views: 9831

Re: Flat Lap vs Hand Held

Ibailey,

I have successfully used the wet grinder that you mentioned. I was lucky to find a jig designed to hold an angle grinder with the disc held vertically. I put the work on a cheap "lazy susan" to finish a disc of any reasonable size. Worked well.

Warren
by Warren Weiss
Thu Apr 04, 2013 6:44 pm
Forum: Techniques and Tools
Topic: Tekta Scrap
Replies: 11
Views: 12758

Re: Tekta Scrap

Jim, Break it up and cast a sink. Use a solid base then a pattern layer and pile up the pieces inside a 1/8 " fiber paper lined stainless steel ring. Pile up with a high center like a pie. After fusing, finish edges with steps to 400 grit wet sander or diamond disc wet angle grinder. Slump/fire...
by Warren Weiss
Fri Mar 29, 2013 7:03 pm
Forum: Techniques and Tools
Topic: I need help with a difficult slump
Replies: 3
Views: 4006

Re: I need help with a difficult slump

Mary,
Your piece varies from one thickness to4. Bottom circle, 2 thickness of blue where the petals overlap and the top circle.
This high level of variation requires, as Marty said, a very slow heat up to avoid thermal shock. This variation also requires a very long aneal hold.
by Warren Weiss
Wed Mar 13, 2013 9:14 am
Forum: Techniques and Tools
Topic: Fusing segment help
Replies: 20
Views: 22784

Re: Fusing segment help

Franzeska, 1/8 is too thin to be durable. It will also contract during your first fuse. I would cut two circles the exact diameter of your mold. Use your tracing to place your designs. Full fuse them together. Make sure that any "glass paint" that you use can stand up to a full fuse (1450-...
by Warren Weiss
Fri Mar 08, 2013 4:42 pm
Forum: Photos and Stuff
Topic: Deeper Slumping
Replies: 15
Views: 19053

Re: Deeper Slumping

Superb!
by Warren Weiss
Sun Feb 24, 2013 12:04 pm
Forum: Techniques and Tools
Topic: TO FUSE OR NOT TO FUSE, that is the question...
Replies: 7
Views: 7664

Re: TO FUSE OR NOT TO FUSE, that is the question...

Havi,
I suspect either face up or face down. Less so face down. Just a suspicion.
Warren
by Warren Weiss
Sun Feb 24, 2013 10:11 am
Forum: Techniques and Tools
Topic: TO FUSE OR NOT TO FUSE, that is the question...
Replies: 7
Views: 7664

Re: TO FUSE OR NOT TO FUSE, that is the question...

Havi,
If you fire this flat I would think the stripes would bend, being displaced by the extra thicknes of glass in certain areas.
What do others think?
Warren
by Warren Weiss
Mon Feb 18, 2013 1:41 pm
Forum: Photos and Stuff
Topic: new work
Replies: 15
Views: 15894

Re: new work

Osnat,
Mazel tov,beautiful work.

Warren
by Warren Weiss
Fri Jan 25, 2013 5:44 pm
Forum: Photos and Stuff
Topic: Abstract For Havi
Replies: 14
Views: 13939

Re: Abstract For Havi

Les,
Very neat. I love it!
Warren
by Warren Weiss
Wed Jan 16, 2013 7:38 pm
Forum: Techniques and Tools
Topic: OPAQUE Bullseye WHITE?
Replies: 6
Views: 5665

Re: OPAQUE Bullseye WHITE?

Havi,
Hold the piece of white behind it and see if any light comes through. Whites usually become more opaique after fireing.
Warren
by Warren Weiss
Mon Dec 10, 2012 12:34 pm
Forum: Techniques and Tools
Topic: My flat bed grinder
Replies: 9
Views: 10389

Re: My flat bed grinder

Havi,
Have someone local that is familiar with small pumps (like garden fountain pumps.) Maybe just a cloged prefilter or tubing kink. If not, email the company. They may be able to ship a replacement pump.
Warren
by Warren Weiss
Sun Dec 09, 2012 2:47 pm
Forum: Techniques and Tools
Topic: sudden, mysterious 'film' on glass
Replies: 20
Views: 20120

Re: sudden, mysterious 'film' on glass

Bonnie,
The tack fuse is what I was referring to a being lost, not the slump (which would also be lost at full fuse.) I don't think any oversprays will glaze over (become shiney) at 1300, but if anyone else has experience at that temp. let us know.
Warren
by Warren Weiss
Sun Dec 09, 2012 12:37 pm
Forum: Techniques and Tools
Topic: sudden, mysterious 'film' on glass
Replies: 20
Views: 20120

Re: sudden, mysterious 'film' on glass

Bonnie,
If you use Spray A you have to go to a full fuse to get it to flow and glaze. That will flatten the glass.
Warren