QTR-Quadtone RIP

Tyler, this might do what you are attempting: Brain's suggestion will work if you are trying to print each ink separately but what follows below will get two inks printing at the same time one on top of the other.

Set the ink limits the same value for the 2 channels you want to use, and set the rest of the channels to 0.

Set the N_OF_GRAY_PARTS=1

Set

GRAY_INK_1=K

GRAY_VAL_1=100

Make the gray_highlight/shadow=0 as Greg said (to get a straight line from 0-100), but instead of making both cross over points 100 make the at the end of the descriptor file paste in COPY_CURVE_(the ink you're using)=K

If you try to set both inks to use the same gray val then one channel gets canceled out. This is the case if you set both inks to GRAY_INK_1= and GRAY_VAL_1=100 as well as setting the second ink to GRAY_INK_2= and GRAY_VAL_2=100. In the text based graph it might look like the C is on top of the K curve, but if you open the quad file CurveView you'll find that only one of the inks is being used (there is only 1 ink with an ink limit that is not "0" )

I pasted an example ink descriptor file below which should work for what you need it to do. You will need to make a few changes depending on the number of inks your printer uses, and the ink limit that you want to print with. I stripped out all the stuff that is not needed and there shouldn't be a problem with it if you're working on a Mac.

Hope that helps,

Richard Boutwell

PRINTER=Quad1430-k6

CURVE_NAME=Shade2on1

GRAPH_CURVE=YES

N_OF_INKS=6

DEFAULT_INK_LIMIT=0

LIMIT_K=75

LIMIT_C=75

LIMIT_M=0

LIMIT_Y=0

LIMIT_LC=0

LIMIT_LM=0

# GRAY VALUE CROSS-OVER POINTS

N_OF_GRAY_PARTS=1

GRAY_INK_1=K

GRAY_VAL_1=100

# GRAY CURVE INFORMATION

GRAY_HIGHLIGHT=0

GRAY_SHADOW=0

GRAY_OVERLAP=0

GRAY_GAMMA=1

GRAY_CURVE=

# Ink Curves

COPY_CURVE_C=K