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Bottle Slumping How to -Trash to Treasures

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Bottle Slumping How to -Trash to Treasures
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Turn your trash bottles into fun little candy and nut dishes, cheese trays or novelty gifts - the possibilities are endless!

If you own a kiln this is a fun and inexpensive project that makes a great novelty gift!

Not sure how to go about it?

Hopefully this guide will help

Kiln forming bottles is not difficult, but it does require a basic knowledge of kiln - forming glass, and terms like devitrification, thermal shock and annealing - there is a lot of glass fusing books and reference materials available on the market today, if you are new to fusing and slumping.

I will be providing a basic guide for you to follow - but keep in mind these are general instructions and it will probably take a few tries in your kiln to perfect.  The good news is - trash bottles are everywhere and easily available for free, so experiment and have FUN!

The first thing you are going to want to do is clean your bottle and remove any labels and allow it to dry thoroughly.  Some colors of bottles will devitrify under high temperatures - get scumy on the surface, so it is recommended that you use a devit spray on the bottle.

Bottles can be fused flat on a kiln shelf or you can use a mold like the one I have picture, (and also sell!)that creates a little dish with the sides turned up.  Either way, you will need to coat your kiln shelf or mold with a kiln wash to prevent it from sticking.

The basic Firing schedule is as follows ~

heat the kiln up to 1100F and soak for about 10 minutes.  Slowly increase the temperature about 500 degrees per hour ~ the soaking time allows the glass to equalize.  If you heat too fast, the bottle is likley to thermal shock, so I think it is better to go slower.

Then continue heating  at about 200 - 250 degrees per hour to 1475F.  Hold that temperature until you get the results you want ~ which should not take more than about 10 minutes.

Now, cool the kiln down as fast as possible to about 1100F  This will stop the bottle from flowing or changing.  I open the kiln a couple of times to do this.

Next, it is time to anneal your bottle so it won't shatter  or thermal shock when you take it out of the kiln.

Glass is annealed at around 800-900 degrees.  I usually just let my kiln cool down slowly overnight and that works well for me and should work in most kilns.

If your bottles crack when you take them out of the kiln, it probably means they were not annealed properly, so I would recommend this whole process being slowed down with longer soaks and lower temperatures  and longer anneal times.

I hope this general guide has been helpful!

Remember, this is supposed to be fun, so experiment with the temps and bottles and your kiln  to achive the results that please you!

We offer a great selection of glass frit casting molds for the fusing artist ~ check out our e-bay store, maybe you'll find more Fun!

And Remember ~ We are only limited by our imagination!

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