Are there any unusable file formats?

Yes, the following may be great for other applications but definitely not for screen printing.
  • Quark Express (.qxd) – Perfect for laying out a magazine
  • Microsoft Word (.doc) – Great for typing a paper
  • JPEG’s (.jpg) – Excellent for websites
  • Picture Files (.pcx) – poor resolution
  • Windows Bitmap (.bmp) – poor resolution
  • GIF’s (.gif) – Excellent for websites
  • PowerPoint (.ppt) – A great presentation program
  • Publisher (.pub) – Sorry, we don’t have it
These are just to name a few.