TLCs are now being used in both home and industrial situations, and also in the medical profession. In 1888, an Austrian botanist named Freidrich Reinitzer discovered a material that held the mechanical properties of liquids and the optical properties of solids. Reinitzer observed a compound called cholesteryl benzoate, and noticed that it changed from a cloudy solid form to a clear liquid form when heated. Reinitzer also observed that the cholesteryl benzoate followed a color sequence from red to blue as it was heated. The substance that Reinitzer found is known today as liquid crystals.
Manila folders to act as backing for the wings.
Hair dryers to act as heat sources, Black markers or crayons to act as filler between liquid crystal sections. Scissors and glue. Some variation in the sensitivity of the liquid crystals as well as the range of temperatures represented is desirable. The form of a diary, or journal might best serve this process. be able to read the temperature being displayed in the pattern of liquid crystals on the wing. A thin film of liquid crystals is placed between two transparent polymer sheets.