Glass Fusing | Frequently Asked Questions
- What is dichroic glass?
- Can dichroic glass be fused together with other glasses?
- Do you offer glass fusing classes?
- I need a place to do my glass work. Do you provide open studio access?
- Can you use dichroic glass for glass blowing?
- Why does dichroic glass have multiple colors?
- What is the firing temperature for dichroic glass?
- What is tack fuse?
- What is a full fuse?
- What is slumping?
- Can I use your kiln to fire my glass work?
- How do you slump (flatten) wine bottles?
- What is needed to slump a wine bottle or any glass bottle?
- What is the rationale for slumping glass bottles?
- My slumped wine bottle broke; can I fix it?
- Can you recycle a glass bottle that has been previously slumped?
- I have a wine bottle from my wedding; can I get it slumped by you?
- What types of bottles can you slump?
- What are the uses for slumped wine bottles?
- Can I paint a glass bottle that has been slumped?
- Can you shape slumped wine bottles?
- Can I fuse two glass bottles together?
- Do you offer classes in other art forms?
What is Dichroic Glass?
Dichroic glass is glass that has been coated with many layers of gold, silver and metal oxides like titanium, platinum, copper, cobalt, etc. But you may ask, "how come I can still see through the layers?" The answer is simple, these layer are so thin (less than35 millionths of an inch!) that, although you have up to 50 layers, you can see right thru them. The ultra thin coatings give dichroic glass a colorful, gemstone appearance that it is highly desirable. The luminance quality, range of colors and variations, patterns and textures that you get from these precious metals makes dichroic glass a beautiful artistic medium to work with. It is used to make glass jewelry, stained glass panels and glass artwork.
Can dichroic glass be fused together with other glasses?
Different glasses, whether they are dichroic or regular glass, can be fused together as long as they have the same COE (coefficient of expansion or the rate that glass expands or contracts during fusion). In order to fuse 2 or more different pieces of glass together they need to be compatible, (their COE's must match). Most fusible glass is "tested compatible", meaning you can take two different pieces of glass, fuse them and not worry about the combined mixture of glass breaking or creating stress fractures because one piece of glass is expanding while the other may be contracting.
Do you offer glass fusing classes?
We teach glass fusing classes where people learn to make dichroic glass jewelry and artwork. Click here for more info.
I need a place to do my glass work. Do you provide open studio access?
Yes, you can access our facilities for a day or join a monthly membership plan - see our Open Studi0 Access program.
Can you use dichroic glass for glass blowing?
Yes you can. You really need to be careful with the quality of the dichroic glass. Poor quality dichroic glass can lead to burnouts and lackluster color performance at the extremely high temperatures used in glass blowing. I believe that CBS Dichro has the best quality dichroic glass around, but I recommend you try out different manufacturers of dichroic glass before purchasing large quantities of glass material from anyone.
Why does dichroic glass have multiple colors?
The multiple colors of the dichroic glass is due to the reflection and refraction properties of the metals used to create the layers. Different layers give you different reflections and light transmissions. Usually a piece of dichroic glass has a name with two colors, the color you see during reflection and the color you see as light passes through the glass.
What is the firing temperature for Dichroic Glass?
Dichroic glass is fused at temperatures ranging from 1200 - 1500 degrees Fahrenheit. This range of temperatures varies depending on the type of firing that you require. Lower temperatures are for slumping, medium temperatures are for tack fusing and kiln forming and high temperatures are for full fusing and glass blowing.
What is a tack fuse?
In tack fusing glass pieces are heated up until they get a little sticky (i.e. tacky) but before changing into a liquid state and blending. The glass pieces will then join together while maintaining the 3D original placement of the glass layers.
What is a full fuse?
In a full fuse glass pieces are heated until the layers get so hot they melt and mix together into one solid smooth mass.
Can I use your kiln to fire my glass work?
Yes, we charge by the cubic inch and depending on whether it is low fire or high fire.
You can pay by the piece or rent the kiln. Kiln rental is $50 for low
fire bisque or $65 for high fire. We can accommodate pieces as large as
25" x 28".
What is slumping?
Slumping is the process of heating up solids like dichroic glass or glass bottles until they flatten out and change shapes.
How do you slump (flatten) wine bottles
To slump a wine bottle (or any glass bottle), clean the bottle thoroughly and remove all the labels and wine (of course removing the wine is often
the best part!). Next, put the bottle on a kiln shelf (you need special kiln wash
to make sure the glass doesn't stick) and turn on the kiln! You
must heat the bottle until around 1200-1400 degrees Fahrenheit
depending on the desired result... a fully fused flattened bottle or a
semi-flattened bottle.
What is needed to slump a wine bottle or any glass bottle?
You need a commercial kiln, preferably digitally controlled, to take the temperature up high enough to get the glass to melt. Some knowledge of basic kiln-forming principles, thermal shock, annealing and devitrification is also needed.
What is the rationale for slumping glass bottles?
Well that's easy! Empty glass bottles are no longer useful to you and you have to get rid of them. Why not recycle and repurpose them for new and creative uses through the slumping process. Click here for some examples on how bottles can be recycled and repurposed as beautiful and functional or decorative artwork pieces that you can use.
My slumped wine bottle broke; can I fix it?
If you really want to, yes you can. It would require re-firing it in
the kiln and overlapping the broken areas. The shape might not be the
same as what you originally started with, but it is still doable.
Can you recycle a glass bottle that has been previously slumped?
In the end, it is still glass, so it is still recyclable. By slumping the bottle you are giving a new life and use to an item.
I have a wine bottle from my wedding; can I get it slumped by you?
Of course you can! It is an amazing way to make something useful out of something meaningful! Click here for info.
What types of bottles can you slump?
You can slump any glass bottle or glass container you have as long as
it isn't contaminated with metals, then you may have problems with the
slumping process. I have slumped Grey Goose bottles; and they look
amazing, wine bottles, Bawls bottles, SoBe bottles and liquor bottles.
The bottles that are painted such as the Grey Goose bottles are really
cool because you still get to see the design and logo in the bottle
after the slumping.
What are the uses for slumped wine bottles?
Uses for slumped wine bottles (and any slumped bottles for that matter)
are pretty limitless. I will list a few here, but I am sure I will
forget many: wall or table decorations, sushi plates, cheese/cracker
trays, sun catchers, wind chimes, personalized mementos, picture
frames, incense burners, candle holders, kitchen spoon holders, bar
cutting boards, ...
Can I paint a glass bottle that has been slumped?
Yes you can! You need to buy glass paints at a local craft store (we use Pebeo glass paints which I believe Michaels sells to the public). After painting a bottle, you must bake it in a house
oven at around 350 degrees for about 40 minutes, and voila, personalized
wine bottle decorations. We have a Paint Your Own Pottery area in our studio and folks come to paint our slumped bottles, or bring their own bottles to be slumped by us and paint them later on at their home.
Can you shape slumped wine bottles?
You can slump glass bottles or glass pieces into various shapes! The
slumping process is the same as the one previously described except
that, instead of placing a bottle or glass piece directly on a kiln
shelf, you place it on a mold that has the shape you desire. The slumped glass will come out of the kiln as an almost exact replica of the mold you used.
Can I fuse two glass bottles together?
This a tricky question. Yes and no is the answer. You can definitely
not fuse two bottles from different manufacturers. The reason is they
may not have the same COE and, in between the fused layers, they will
break away from each other. You could possibly fuse two bottles from
the same manufacturer but over time there might be variations in the
glass they use to make the bottles that might make them incompatible.
So the answer is yes, but with hesitations. As long as you don't get
your hopes up, you may end up with a master piece or just shards of glass.
Do you offer classes in other art forms?
We also teach hand-building and whee- throwing pottery to adults and kids of different skill levels. Click here for info.