At least a part of the insulation layers is made of an insulation material which increases electric conductivity thereof when an ultraviolet radiation is irradiated. At least one of the notches has opposing notch sides which are oriented such that when a portion of a web is received therein, one of the notch sides contacts the web at a first portion of the web and the other notch side contacts the web at a second portion of the web such that the first portion of the web and the second portion of the web are not located on a common longitudinal axis. The color correction filtering system gamma decompensates incoming color video data referenced to a non-linear color space through use of a linearization filter.