The production of the candy also provides a teaching experience, showcasing the process whereby a supersaturated solution--in this case, sugar and water--is unstable, and evaporation will cause the crystals to precipitate or form back into a crystalline structure with very little provocation.
Locate the jar in a warmer part of the house, such as near a heating vent, and also position a fan to blow over surface of the jar to continue to speed up the formation of the crystals. Sweet Science: Ross was featured on the cover of "Instore Buyer" magazine and his articles have appeared on various websites. Warmth and moving air speed up evaporation of the water in the solution, causing the crystals to precipitate or form into crystals faster than normal.
When the string is suspended in the solution, it gives the sugar crystals in the solution something to attach to. Stir 4 cups sugar into the boiling water with a wooden spoon until the sugar dissolves and the solution turns clear.
Food coloring can be added to the solution to create colored candy. References The Accidental Scientist: Tip Food coloring can be added to the solution to create colored candy.
About the Author. The heavy syrup will adhere to skin and create very bad burns.
It is exciting for children to make, because the progress of the crystal formation can be followed day by day, building anticipation for the finished candy. Balance the pencil across the top of the jar, and drop the heavy nut into the solution, straightening the string.
The process is usually slow, but it can be sped up with the right stimuli.
Rock candy, which is composed of sugar crystals, is one of the oldest forms of candy. If the solution gets on your skin, immediately run cold water over the affected area to cool the syrup.
Continue stirring until the solution again reaches a rolling boil. Seek medical help if necessary.
Warning Be extremely careful when boiling and pouring candy. Antique Cup image by Vanessa van Rensburg from Fotolia. Make sugar crystals in three to five days instead of the usual seven days or more. Remove the saucepan from the burner, and pour the solution into a heavy tempered jar, such as a canning jar.