Quick Answer: The Thermocolour Sheet 20 to 25°C is a 150 mm x 300 mm thermochromic liquid crystal sheet that changes colour with temperature, making temperature differences visible as colour.
Last updated: October 2026
Key Features
Thermochromic liquid crystal printed on one side, with a black backing
Turns from black to red, then through the visible spectrum, then black again as it warms
Reversible: the colour sequence reverses on cooling
Pressure sensitive adhesive backing with removable release liner
Sheet size 150 mm x 300 mm; can be cut into smaller pieces
Technical Specifications
Specification
Value
Temperature range
20 to 25°C
Sheet size
150 mm x 300 mm
Material type
Liquid crystal
Activation method
Temperature
Backing
Pressure sensitive adhesive
About This Product
Liquid crystals have twisted helical structures that expand or contract as the temperature changes, so they reflect different wavelengths of light, which the eye sees as changing colours. The sheet can be used to demonstrate conduction, insulation, convection, radiation and friction, and in many other experiments involving temperature change.
Frequently Asked Questions
Q1. Is the colour change permanent? No. The colour changes are reversible, and on cooling the colour sequence runs in reverse.
Q2. Can the sheet be cut? Yes. The sheet is 150 mm x 300 mm, and most experiments can be done with much smaller pieces cut from it.
