Colour-changing T-shirts make the most of thermochromic or photochromic inks that react to temperature adjustments or UV rays, respectively. To activate the colour change indoors, particular strategies are essential.
For thermochromic inks, warmth activation is required. Holding a heat object close to the design or utilizing a hair dryer on a low warmth setting can provoke the colour change. Alternatively, inserting the T-shirt in a heat setting, equivalent to close to a radiator, can even activate the impact.
