Thanks Spiderx1, I will try this tomorrow when I go to the shop. The guy that sold us the system told me to use PhotoShop as the editor, then save as a TIFF, then bring into FastArtist and then after removing the background with Fast Artist, print to Fast Rip. So That is what I have been doing... Is there a better way to print? And print just a little white?
As FatKat said, you'll save yourself a step by saving your artwork as a PNG (or a PSD without layers) with a transparent background and bringing that file directly into FastArtist. Then you won't have to worry about removing the background.
Immediately after you import your artwork with a transparent background into FastArtist, a dialog box will pop up asking you if you'd like to create an underbase automatically from the transparency layer. Click Yes. Usually, you'll use the settings Medium underbase layer, None or Minimum choke, and No highlight white.
If you'd like to use less white ink, you can select a Light underbase layer from that menu. Alternatively, you can choose to print your white underbase at 720x720 instead of 1440x1440.
(Note: Creating your underbase this way means you can skip the Underbase Wizard step.)
As far as white ink brightness goes, there are two factors in play. The first is the color of your shirt. If you're printing on a black t-shirt, you'll probably need to put down more white underbase than on a lighter color. The second factor is how you'd like the final design to appear. Keep in mind that the brightness and coverage of the white layer will determine how much "pop" the color layer gets when it goes down on top of the white. Ultimately, you'll need to decide what your preference is for the final print to decide how much white to put down.
Hope this helps - please let us know if you have any more questions.