Mitundu ya Themochromicamapangidwa ndi makapisozi ang'onoang'ono omwe amasintha mtundu mobwerezabwereza. Kutentha kukakwezedwa mpaka kutentha kotchulidwako pigment imachoka pamitundu yoyera kupita yopanda mtundu (kapena kuchokera pamtundu wina kupita kumtundu wina). Mtunduwo umabwerera ku mtundu wapachiyambi pomwe utoto utakhazikika.