ref: 3f7a323e31ddc5989de00d86e3dab6cd6929c00c
dir: /sys/src/cmd/gs/lib/ras4.upp/
-supModel="SUN rasterfile, 4 Bit, 6+1 Colors (CMYK-Ghostscript)"
-sDEVICE=uniprint
-dNOPAUSE
-dSAFER
-dupColorModel=/DeviceCMYK
-dupRendering=/ErrorDiffusion
-dupOutputFormat=/SunRaster
-dupComponentBits="{1 1 1 1}"