Auto-vanishing pen 1.it can disappering spontaneously 2.use scope:garments,shoes,and wedding address ,underwears on fabric or textiles purpose and so on 3.tempotarliy signed on it 4.more than ten years experiences 5.have passed authority diplomas 6.according to different temperture,models and materials it can disappering automatically! 7.various new tubes for your choice 8.can be used in fabrics or textiles