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Issue #016 - Recycled Glass
December 31, 2009

Hot Out of the Kiln

December 31, 2009


Hot Out of the Kiln brings you the latest information, ideas, and resources for your glass fusing experience. If you like this newsletter, please forward it to share it with your friends.

In this Issue of Hot Out of the Kiln:

1. Feature Article
2. Quote of the Month
3. Since Last E-zine
4. Reader Question
5. Tips and Tricks
6. Additions to Site
7. What's New

Feature Article - Recycled Glass

Recycled glass has been around forever! Experimenting with bottle glass, window glass, or even art glass can deliver some very interesting and elegant results. I can be very exciting and quite rewarding to see what was once garbage magically transformed into something gorgeous and stunning.

On this particular piece, I used a blue Sky bottle. First I filled a mold with the larger pieces and then sprinkled in the smaller pieces. The tiny pieces give it an added shimmer.

As a rule using any of these types of glass, they need to fire much hotter to melt and the holding times will run longer to achieve the same or similar results that you have with regular fusing glass.

There are the issues of unknown Coefficiency of Expansion and devit. Even if the bottles are from the same manufacturer, there is no guarantee that the COE of each bottle will be the same. If you are planning on selling or even gifting any item, it is highly recommended that a polarized film be used to check for any stress in the glass.

To avoid devit, try slumping pieces for a longer time instead of a higher temperature. Suggested slumping temperatures are 1100 or 1150 with a longer hold time. A fine coating of borax and water will help prevent devit. This solution can leave a coating on the surface when removed from the kiln, but it can usually be removed with water, vinegar and a scrubby.

Quote of the Month

“True are takes note not merely of form, but also of what lies behind.” – Mahatma Gandhi

Since Last E-Zine

I have been working on my Christmas gifts over the past few weeks. This year I finally settled on making Coral bowls for the girls. They take several firings before you finally achieve the final piece.

These are very unique and interesting pieces. They have gaping holes and long arms that reach out in every direction. They are no good for holding any liquid, but make outstanding conversational pieces.

Since I was given some iridescent brownish yellow glass last year, I decided that it would make a fantastic base for the piece. A transparent yellow glass added some subtle accent to the piece which really made the rest of the glass pop.

I will be putting up a page on designing these bowls pretty soon, so if you are interested in making these, check out the site!

Wishing everyone a Healthy, Happy and Creative New Year!

Reader Question

Estella writes:

Hello Connie,

I would like to say that I enjoy receiving your newsletter. The newsletter is always filled with so much helpful information, so thank you for that! I do have a question for you.....well I will tell you what my pea headed brain is thinking, could be scary at times. I want to know if you have any suggestions etc., for a firing schedule for me. I am trying to put some different sized flower vases in my kiln to see if I can get them to slump into weird shapes. I have a couple of tall (around 8" or so) and some short ones (around 6") I have sand blasted on them, put them into the kiln and tried to see if I can get them to sag into some interested shapes, any suggestions??????? I have a three different kilns, two for glass one for ceramics. I used a couple of different schedules, just can't seem to get the glass to do what I want is that is to droop a little, sag a little, just get interesting for me. Ok, I will be anxiously awaiting your response. With much thanks, Estella (oh I am just using store bought clear flower vases, I did use a lavender one and it started to move but I didn't want to try it again and devitrify the glass. Thanks a bunch schedule I used was 300 to 1250 hold 25min, full to 960 hold 40 min, 170 to 700 hold 10 min, cool to room temp.



Since these are store purchased vases and not made out of fusible glass, there is no way of knowing the COE of the glass. I would suggest taking it up slowly (around 300 degrees Fahrenheit per hour to about 1000 degrees Fahrenheit and holding at that temperature for about 10-20 minutes to allow all the glass to even out temperature wise.

You probably won't notice any movement at that low of a temperature because of the type of glass. Take it up a little higher and peek to see what is happening to the glass. Be sure to wear protective lenses and gloves. Once you see the piece start to move keep an eye on it until it reaches the desired slump. Note the temperature achieved, then you will have more of an idea of the temperature you need for any future firings.


Tips and Tricks

Devit tends to develop in the 1375 degree Fahrenheit range. Fire as fast as possible between 1250 degrees Fahrenheit and 1400 degrees Fahrenheit.

Additions to the Site

12/14/09 – Christmas Cat

12/17/09 – Cozy Christmas Fireplace

12/18/09 – Xmas Present

12/20/09 – Holly Jolly Christmas

12/22/09 – Personalized Christmas Ornaments

12/27/09 – Peppermint Candy

12/29/09 – Santa’s Sleigh

12/30/09 – Three Christmas Trees

12/31/09 – Candy Cane

What's New - 14" Two Prong Bent End Rake

Delphiglass has a new two prong bent end rake for combing glass. They have had a 14 inch single prong tool for quite a while, but have now come out with a rake that can comb two areas at the same time. This will certainly save opening and closing that kiln lid and having to wait for the glass to warm up again before you can make another stroke through the molten glass.

This new dual-prong warm glass rake sells currently for $31.95 as opposed to the single prong tool that sells for $15.95. If you enjoy the hot and exciting method of glass combing, then this tool is for you!

Check out the new two prong bent end rake.

Thank you for subscribing

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Finally, thank you for signing up for the newsletter. If you know anyone else that might like to receive it please let them know. They can either visit the site and sign up, or send me an email at

Comments? Ideas? Feedback? I would love to hear from you. Just reply to this e-zine and tell me what you think!

See you next month…


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