XpressScan & Silkscreen require art in Adobe Illustrator compatible format (.ai, .eps, .pdf) with no gradients or halftones. Simple images only. Silkscreen art must indicate PMS colors. RasterPrint requires Vector or Raster art in Adobe Illustrator compatible format (.ai, .eps, .pdf, .psd, .tiff) and not less than 100dpi at final print size. PMS colors are preferred, but CMYK or RGB colors are acceptable. PMS color match is not exact but will be matched as closely as possible. For best results please provide a physical color sample in advance.