Imibala ye-Themochromiczenziwe ngee-micro-capsules ezitshintsha umbala ngokubuyisela umva.Xa iqondo lobushushu linyuselwa kwiqondo lobushushu elichaziweyo i-pigment isuka kumbala ukuya kumbala (okanye ukusuka komnye umbala ukuya komnye umbala).Umbala ubuyela kumbala wokuqala njengoko i-pigment ipholiswa phantsi.