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Step 1: 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
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
Step 2: The Mix
2 cups water
1 cup corn syrup
3 1/2 cups sugar
1/4 tsp. cream of tartar
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 temperature, 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 refrigerator until you need to break it.
Step 3: The Mold and the Pour
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!
Step 4: The Removal
Step 5: The Execution
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 extinguisher 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.