auto vanishing pen

[1]environmental protection,not any poison
[2]Auto vanishing pen is best used by shoes industry,especially use in sport
shoes for temporary marking
[3]The writing will disappear spontaneously,the disappear time can adjust
[4]We have multi-design.
WARNING
[1]Auto vanishing pen is the same with disappearing ink pen and air erasable pen
in some condition.
[2]Use the auto vanishing pen in its available time.
[3]Please use "the water" or "clearning pen" to get rid of the writing,if the
writing do not disappear on normal situation.
[4]the disappear time is limited to the material,air wet condition,temperature,
and so on.