Hale, Nathan S. and Ming Xu. Method of printing a multiple color image using heat sensitive inks and applying a polymer surface preparation material to a substrate. Patent CA2182985C. 1994-02-10. https://patents.google.com/patent/CA2182985C/en (15 May 2018).

Hale, Nathan S. and Ming Xu. Method of printing a multiple color image using heat sensitive inks and applying a polymer surface preparation material to a substrate. Patent CA2182985C. 1994-02-10. https://patents.google.com/patent/CA2182985C/en (15 May 2018).