An image sensing unit is disclosed. , primarily for use in cardiovascular or arthroscopic surgery. The print signal is filtered by a predefined mask that defines for which print pixels no marking material will be applied independent of the pixel value of the associated image pixel. When it is determined that the right exists, reproduction means 70 reproduce the contents for the reproduction device recording at the content record part 64. 05 parts by weight to 2 parts by weight relative to 100 parts by weight of the non-conductive particles; and a BET specific surface area of the non-conductive particles is 5 m2g to 10 m2g.