Peb cov khoom tseem ceeb muaj xws li photochromic pigment, thermochromic pigment, UV fluorescent pigment, pearl pigment, glow nyob rau hauv cov xim tsaus nti, optical cuam tshuam tsis sib xws pigment, lawv yog nrov siv nyob rau hauv txheej, number case, yas, xim, thiab kev lag luam tshuaj pleev ib ce.Peb kuj muab thiab kho cov xim no thiab pi...
Nyeem ntxiv