I'm currently into a discussion with some guys at Canon about our way of printing on the CLC. We use it to print out pdf files from customers. Some tend to use a marks file where a black is made up of CMYK = registry. When we print it out, of course we get the 4 toners onto each other resulting in a print where the black comes of. Does anyone else know how we can print from acrobat to basicly any machine where the option registry is black (or something like it) can be used?