These days, fake break-away glass is now typically made from a clear resin, but for low-budget or home fun, you can make your own with just a few simple things.
Step 1: What you need
- 1 C Water
- 1.75 C Sugar
- .5 C Corn Syrup - the clearer the better
- .25 t Cream of Tartar
- Sauce Pot
- Spoon or spatula (I recommend high temp silicone)
- Candy or Deep Fry thermometer (needs to go up to 300 degrees accurately)
- Corn Starch
Step 2: Sugar
The glucose and fructose are connected by a single oxygen atom. By applying heat and an acid (cream of tartar), you can break the bond between the saccharides. More on that later.
Sugar is hygroscopic which means that it really likes water. If you've ever left hard candy out in the open on a humid day, you've probably returned to a sticky mess later. Therefore, any sugar glass that you make, you need to use quickly.
In theory, you can make sugar glass with just sugar, water and heat, but it will be very unstable as you make it, and very likely to burn or flash crystalize.
See the following links on Sucrose for more information: