Marked cards can be divided into
infrared marked cards, UV marked cards
and contact lenses marked cards.
UV marked cards is out of date and no
one will use it.
The infrared marked cards still used by
some people, especially the area of
Russia ,this kind of marked cards should
be used with infrared system and can’t
be recognized by any other systems. It’s
a good kind of marked cards.
Contact lenses marked cards is the
latest kind of marked cards, it has
abandoned the camera system, you can use
just by wearing a special contact
This kind of marked cards has the
advantages as follows:
1.You can see the marks on the back with this contact lenses.
2.The naked eyes can see nothing and the marks are clear.
3.Nothing difference with the marked cards and the original cards,including the signs and the colors.
4.After you wearing it ,you can see the marks in shine white colors clearly.