Edit

How To Make Sugar Glass

How to Make Sugar Glass


by Erik Beck

Hey everyone and welcome to the technical blog for Episode#6 (Sugar Glass). I've always wondered about sugar glass, and was surprise at how easy it was. You can buy everything you need at the grocery store and make it in your kitchen. Remember to send us your sugar glass episodes. All you have to do is upload, and you could be featured in our monthly user submitted podcast.

Also, remember to subscribe to our show on iTunes and stop by our website, Indy Mogul, for some more Backyard FX.

LATEST VIDEOS
MY LATEST VIDEOS

 

Warning! This build can be dangerous. You are dealing with molten sugar lava and sugar glass that can still be sharp.


Shopping List

   1. A big bottle of white corn syrup.
      (I bought the one quart size.)

   2. A can if non-stick cooking spray.


   3. A big bag of white sugar.
      (You can always use more sugar, buy a pound!)

   4. A candy thermometer.
      (Chances are you can borrow one of these.)

   5. Cream of Tartar.
      (Turns out this is actually a powder, you can find it in the spice section.)

   6. A big pot.
      (I read somewhere that the pot would be ruined after you make this, but mine was fine with a wash.)

   7. Measuring cup.
      (Again you should be able borrow this if you don't already have one.)

   8. A Mold.
      (For a sheet of sugar glass all you'll need is big cookie sheet, but you can make more complicated molds.)

   9. Water.

The Mix

It doesn't get any easier then this. The proportions I used for a 17"x11" sheet of glass is as follows.

    * 2 cups water
    * 1 cup corn syrup
    * 3 1/2 cups sugar
    * 1/4 tsp. cream of tartar


 

How To Make Sugar Glass


Now mix these ingredients into your pot and SLOWLY bring them to a boil. If you heat it too rapidly the mix sugar will caramelize (become yellow and burnt). Depending on the altitude your sugar glass mix should start to boil around 160-200*F. Your mix will start cloudy and white, but as it starts to boil it becomes clear.

 

 
If you're heating it at the right pace, it should take at least an hour to reach our target tempature, which is 300*F. My first batch started turning slightly yellow at about 290* and resulted in yellow glass. The second batch I removed at 260*, and while being more clear, it was very soft. My remedy, put it in the refridgerator until you need to break it.

The Mold and the Pour
The simplest mold to use is just a big cookie sheet. I used a standard 17"x11" size. First thing you want to do is spray the crap out of your sheet with cooking spray. This will allow the glass to come out of the mold when dry. Now once your sugar glass mix comes off the stove it will start to dry fast. So don't wait long to pour. Go slow making sure to spread the mix evenly across the mold. I even picked up the mold and rocked it back and forth to get the mix level and in all the corners.

 

There might be some small bubbles on the surface. Most of these should go away, but feel free to (carefully) pop them with something pointy. Now just wait 1 hour!

The Removal

Now we had some funny footage of this that didn't make it on the show. This can be a difficult process. What finally worked for me was to take a knife and heat it up under hot water, then carefully cut along the very edge where the glass meets the edge of the pan. After that I was able to carefully pry it up. Then flip it over and slowly lift the pan away from the sugar glass that is resting on you hand.

The Execution
Sugar glass does not last long...at all. As I said before, keep it in the fridge until you need it. After only 10-15 minutes at room tempature the glass will start to sweat and get sticky. The longer you leave it out the more it will just bend instead of break.
There are tons of creative ways to use this stuff. You could try and make a big window out of smaller sheets, break a fire exstinguisher case, or just break it and stick it to your actors face to make them look like they just went threw a window. Just keep in mind that you can still cut yourself with this stuff.
 

Tagged: , , , , ,

View/Add Comments (4)

4 Comments

(2000 character limit)

Ken on Nov 02, 2010:

I would like to know how to make a simple tube of sugar glass.  I am making a Willie Wonka cake and plan on showing the different scenes of the kids.  I would like to have the scene where the kid flies up the tube of the chocoalte river.  Any ideas?  thanks.


Sugar Glass King on Aug 11, 2010:

I found that getting the bottle shape is the hardest. I ended up using Modelling clay with cooking oil sprayed to the inside, very lightly. It worked well, but it was a real process of trial and error.  


megrockstar on Jun 24, 2007:

that is cool


lafemmedramatique on Jun 19, 2007:

oh wow, that is so cool! I remember my drama teacher telling us that they had glass bottles that were actually made out of sugar that they used to break over people's heads so it wouldn't actually hurt them, and this must be what they make them out of.... I wonder how they get the bottle shape though... (i'm going to be a drama teacher myself, and I'm a very hands on one w/ costumes, props, set, etc.... i guess i just have a god complex or something... haha)

If you ever figure out how to shape stuff (not just bottles, but anything) be sure to post it!


All comments
Comments RSS