Mực phản ứng hóa học

Chemical discoloration ink has added some special chemical coloration material,Generally used for printing all kinds of children’s books,the prints are colorless,we can not see any pattern in appearance,but need to use the chemical pen or chemical water to draw on the text then can see the colored images.
Màu sắc:Bright red,rose red,màu xanh da trời,màu vàng,đen,brown,peacock green,
Blackish green.
In cách:Bù lại