I have been lurking here for awhile and have gained a great deal of help, so thank you in advance. I am at a professor at a university and have my first screen printing class this spring. We have an Epson 4880, Epson 7900, and Canon Pixma Pro - enough options that I shouldn't be struggling with film positives. We do not have rip software or an all black set up. I have tinkered with the settings quite a bit. If you have one of these printers, can you share your settings and film brand suggestions?