Writing materials （ friction ） disappear now available!
-Rub the inks become transparent.
-No Caspar, also rubbed off.
-Write and matte can bunch.
-Please do not leave in place at 60 ° c or more. The ink becomes colorless.
Return to writing was clear and be around-10 ° c.
-Depending on the type of paper, thermal paper, suitable for deletion.
• Do not leave in direct sunlight.