I would like to design some t-shirts as a birthday present for someone using Adobe Illustrator but I don't know anything about printing on clothing. Laser and ink transfer printing are kind of cheap looking, especially the kind you see at shopping centers. I would like something that is durable & won't fade and I don't know if iron-on will cut it. Should I stick to die-cut or silk screening process instead? If so, I would prefer to send it to a printer. A couple of questions off the top of my head - What are the guidelines for prepping artwork to a printer? Are gradients allowed or should the be converted in halftone dots, or avoided altogether and use solid colors? What's the limit of number of colors to use? What file format should the design be saved in (.ai, .jpg, .pdf, .psd, .tif)? What's the minimum size for line thickness or detail for printing at 100%? If I send my artwork to places like threadless.com or mysoti.com do I retain the copyright? Any recommendations or links to web sites would be appreciated.