A T-shirt with thermochromic ink textile printing changes from white to blue when it reaches 32°C, offering a direct visual signal that the body is heating up. This technology aims to prevent heatstroke in athletes or workers exposed to high temperatures, using a simple mechanism without the need for batteries or screens. The garment acts as a portable thermometer that anyone can read at a glance.
How the ink that reacts to body heat works 🌡️
Thermochromic ink contains microcapsules with a liquid crystal that rearranges when it exceeds 32°C, altering its ability to reflect light. In a cold state, the crystal scatters white light; when heated, it absorbs certain wavelengths and reflects blue. The process is reversible, so when the temperature drops, the garment returns to its original color. This type of technology is used in beverage labels or thermometers, but adapting it to flexible and breathable fabrics requires a special fixing process so that washing does not degrade the effect.
The thermometer you wear that doesn't tell you if you smell bad 😅
Having a T-shirt that tells you you're hot is like having a friend who only talks to you when you're already sweating. Because, let's be honest, to realize you're at 32 degrees you don't need magic ink: just having the air conditioning not working is enough. Sure, at least this garment doesn't judge you for sweat stains, it just changes color and makes it clear that your body is a portable sauna. Too bad it doesn't warn you when the gym smell becomes unbearable.