Here are the steps in the text file for how to color-separate to halftones in photoshop & I've attached the text file and action to this in case its not in the previous post.
_________________________________
FULL-SPECTRUM FREE WCMYKW+RGBCMY PHOTOSHOP COLOR SEPARATION RIP TUTORIAL
______________________________________________________________________
(With MERGED over Transparent with no other layers, RGB Mode Document in Adobe Photoshop)
IMAGE> IMAGE SIZE> RESOLUTION: 1200 DPI, RESAMPLE CHECKED, NEAREST-NEIGHBOR (HARD EDGES)
RENAME ORIGINAL LAYER of MERGED ART TRANS BG to:
"ORIGINAL"
LAYER> DUPLICATE LAYER:
Name: "ORIGINAL INVERTED"
IMAGE> ADJUSTMENTS> INVERT
EDIT> FILL> CONTENTS: USE: WHITE, BLENDING: MODE: BEHIND, OPACITY 100%, OK
LAYER> HIDE LAYERS
(SELECT LAYER "ORIGINAL")
EDIT> FILL> CONTENTS: USE: WHITE, BLENDING: MODE: BEHIND, OPACITY 100%, OK
(SELECT RED CHANNEL SO THAT ALL CHANNELS ARE INVISIBLE EXCEPT RED)
IMAGE> MODE>BITMAP (Flatten Layers? OK)
RESOLUTION: OUTPUT: 1200, METHOD: USE: HALFTONE SCREEN (OK)
FREQUENCY: 45, ANGLE: 22.5, SHAPE: ROUND (OK)
SELECT> ALL
EDIT> COPY
EDIT> STEP BACKWARD
EDIT> STEP BACKWARD
(SELECT RED CHANNEL SO THAT ALL CHANNELS ARE INVISIBLE EXCEPT RED)
EDIT> PASTE SPECIAL> PASTE IN PLACE
(SELECT GREEN CHANNEL SO THAT ALL CHANNELS ARE INVISIBLE EXCEPT GREEN)
IMAGE> MODE>BITMAP (Flatten Layers? OK)
RESOLUTION: OUTPUT: 1200, METHOD: USE: HALFTONE SCREEN (OK)
FREQUENCY: 45, ANGLE: 22.5, SHAPE: ROUND (OK)
SELECT> ALL
EDIT> COPY
EDIT> STEP BACKWARD
EDIT> STEP BACKWARD
(SELECT GREEN CHANNEL SO THAT ALL CHANNELS ARE INVISIBLE EXCEPT GREEN)
EDIT> PASTE SPECIAL> PASTE IN PLACE
(SELECT BLUE CHANNEL SO THAT ALL CHANNELS ARE INVISIBLE EXCEPT BLUE)
IMAGE> MODE>BITMAP (Flatten Layers? OK)
RESOLUTION: OUTPUT: 1200, METHOD: USE: HALFTONE SCREEN (OK)
FREQUENCY: 45, ANGLE: 22.5, SHAPE: ROUND (OK)
SELECT> ALL
EDIT> COPY
EDIT> STEP BACKWARD
EDIT> STEP BACKWARD
(SELECT BLUE CHANNEL SO THAT ALL CHANNELS ARE INVISIBLE EXCEPT BLUE )
EDIT> PASTE SPECIAL> PASTE IN PLACE
SELECT> DESELECT (IF STILL SELECTED)
(SELECT RGB CHANNEL ON TOP SO THAT ALL CHANNELS ARE SHOWING)
(SELECT LAYER "ORIGINAL INVERTED")
LAYER> SHOW LAYERS
IMAGE> ADJUSTMENTS> BLACK & WHITE> REDS: 100%, YELLOWS: 100%, GREENS: 100%, CYANS: 100%, BLUES: 100%, MAGENTAS: 100% (OK)
IMAGE> ADJUSTMENTS> INVERT
(SELECT RED CHANNEL SO THAT ALL CHANNELS ARE INVISIBLE EXCEPT RED)
IMAGE> MODE>BITMAP (Flatten Layers? OK)
RESOLUTION: OUTPUT: 1200, METHOD: USE: HALFTONE SCREEN (OK)
FREQUENCY: 45, ANGLE: 22.5, SHAPE: ROUND (OK)
SELECT> ALL
EDIT> COPY
EDIT> STEP BACKWARD
EDIT> STEP BACKWARD
(SELECT RED CHANNEL SO THAT ALL CHANNELS ARE INVISIBLE EXCEPT RED)
(MAKE SURE ALL RGB CHANNELS AND RGB-CHANNEL SHOWING)
EDIT> PASTE SPECIAL> PASTE IN PLACE
LAYER> MERGE DOWN
IMAGE> ADJUSTMENTS> INVERT
(SELECT RED CHANNEL SO THAT ALL CHANNELS ARE INVISIBLE EXCEPT RED)
RIGHT-CLICK ON THE RED CHANNEL> SELECT DUPLICATE CHANNEL> NAME: HIGHLIGHT WHITE,(OK)
DOUBLE-CLICK CHANNEL> COLOR INDICATES: SELECT SPOT COLOR, COLOR: SET TO WHITE, SOLIDITY: 100%, (OK)
(SELECT RGB CHANNEL ON TOP SO THAT ALL CHANNELS ARE SHOWING)
LAYER> DELETE> LAYER (YES) (WITH THE "ORIGINAL INVERTED" SELECTED TO DELETE THIS LAYER)
LAYER> DUPLICATE LAYER> NAME: BLACK (OK)
IMAGE> ADJUSTMENTS> BLACK & WHITE> REDS: 100%, YELLOWS: 100%, GREENS: 100%, CYANS: 100%, BLUES: 100%, MAGENTAS: 100% (OK)
(SELECT RED CHANNEL SO THAT ALL CHANNELS ARE INVISIBLE EXCEPT RED)
RIGHT-CLICK ON THE RED CHANNEL> SELECT DUPLICATE CHANNEL> NAME: BLACK,(OK)
DOUBLE-CLICK CHANNEL> COLOR INDICATES: SELECT SPOT COLOR, COLOR: SET TO BLACK, SOLIDITY: 100%, (OK)
(SELECT RGB CHANNEL ON TOP SO THAT ALL CHANNELS ARE SHOWING)
LAYER> DELETE> LAYER (YES) (WITH THE "BLACK" RGB LAYER SELECTED TO DELETE THIS LAYER)
IMAGE> APPLY IMAGE> SOURCE, LAYER: MERGED, CHANNEL: BLACK, INVERT CHECKED,, TARGET, BLENDING: ADD, OPACITY: 100%, SCALE: 1, OFFSET: 0, UNCHECKED ALL, (OK)
(SELECT RED CHANNEL SO THAT ALL CHANNELS ARE INVISIBLE EXCEPT RED)
RIGHT-CLICK ON THE RED CHANNEL> SELECT DUPLICATE CHANNEL> NAME: CYAN,(OK)
DOUBLE-CLICK CHANNEL> COLOR INDICATES: SELECT SPOT COLOR, COLOR: SET TO CYAN, SOLIDITY: 0%, (OK)
(SELECT GREEN CHANNEL SO THAT ALL CHANNELS ARE INVISIBLE EXCEPT GREEN)
RIGHT-CLICK ON THE GREEN CHANNEL> SELECT DUPLICATE CHANNEL> NAME: MAGENTA,(OK)
DOUBLE-CLICK CHANNEL> COLOR INDICATES: SELECT SPOT COLOR, COLOR: SET TO MAGENTA, SOLIDITY: 0%, (OK)
(SELECT BLUE CHANNEL SO THAT ALL CHANNELS ARE INVISIBLE EXCEPT BLUE)
RIGHT-CLICK ON THE BLUE CHANNEL> SELECT DUPLICATE CHANNEL> NAME: YELLOW,(OK)
DOUBLE-CLICK CHANNEL> COLOR INDICATES: SELECT SPOT COLOR, COLOR: SET TO YELLOW, SOLIDITY: 0%, (OK)
(CREATE A NEW CHANNEL in THE CHANNELS will be called Alpha 1, Rename to "UNDERBASE WHITE")
IMAGE> ADJUSTMENTS> INVERT
DOUBLE-CLICK CHANNEL> COLOR INDICATES: SELECT SPOT COLOR, COLOR: SET TO WHITE, SOLIDITY: 100%, (OK)
WHILE SELECTED ON THE UNDERBASE WHITE CHANNEL,
IMAGE> APPLY IMAGE> SOURCE, LAYER: MERGED, CHANNEL: HIGHLIGHT WHITE, INVERT NOT CHECKED,, TARGET, BLENDING: LINEAR BURN, OPACITY: 100%,UNCHECKED ALL, (OK)
IMAGE> APPLY IMAGE> SOURCE, LAYER: MERGED, CHANNEL: CYAN, INVERT NOT CHECKED,, TARGET, BLENDING: LINEAR BURN, OPACITY: 100%,UNCHECKED ALL, (OK)
IMAGE> APPLY IMAGE> SOURCE, LAYER: MERGED, CHANNEL: MAGENTA, INVERT NOT CHECKED,, TARGET, BLENDING: LINEAR BURN, OPACITY: 100%,UNCHECKED ALL, (OK)
IMAGE> APPLY IMAGE> SOURCE, LAYER: MERGED, CHANNEL: YELLOW, INVERT NOT CHECKED,, TARGET, BLENDING: LINEAR BURN, OPACITY: 100%,UNCHECKED ALL, (OK)
IMAGE> CALCULATIONS> SOURCE 1, LAYER: MERGED, CHANNEL: YELLOW, INVERT UN-CHECKED,, SOURCE 2, LAYER: MERGED, CHANNEL: MAGENTA, INVERT UN-CHECKED,, BLENDING: ADD, OPACITY: 100%, SCALE: 1, OFFSET: 0, UNCHECKED ALL, , RESULT: NEW CHANNEL, (OK)
DOUBLE-CLICK CHANNEL> SET NAME TO "RED", COLOR INDICATES: SELECT SPOT COLOR, COLOR: SET TO RED, SOLIDITY: 100%, (OK)
IMAGE> CALCULATIONS> SOURCE 1, LAYER: MERGED, CHANNEL: YELLOW, INVERT UN-CHECKED,, SOURCE 2, LAYER: MERGED, CHANNEL: CYAN, INVERT UN-CHECKED,, BLENDING: ADD, OPACITY: 100%, SCALE: 1, OFFSET: 0, UNCHECKED ALL, , RESULT: NEW CHANNEL, (OK)
DOUBLE-CLICK CHANNEL> SET NAME TO "GREEN", COLOR INDICATES: SELECT SPOT COLOR, COLOR: SET TO GREEN, SOLIDITY: 100%, (OK)
IMAGE> CALCULATIONS> SOURCE 1, LAYER: MERGED, CHANNEL: CYAN, INVERT UN-CHECKED,, SOURCE 2, LAYER: MERGED, CHANNEL: MAGENTA, INVERT UN-CHECKED,, BLENDING: ADD, OPACITY: 100%, SCALE: 1, OFFSET: 0, UNCHECKED ALL, , RESULT: NEW CHANNEL, (OK)
DOUBLE-CLICK CHANNEL> SET NAME TO "BLUE", COLOR INDICATES: SELECT SPOT COLOR, COLOR: SET TO BLUE, SOLIDITY: 100%, (OK)
IMAGE> MODE> MULTICHANNEL (FLATTEN LAYERS OK)
(TOP RGB-CHANNEL DISAPPEARS, RED, GREEN, BLUE CHANNELS BECOME Cyan, Magenta, Yellow)
(SELECT CYAN CHANNEL AT THE TOP SO THAT NO OTHER CHANNELS ARE SHOWING)
IMAGE> APPLY IMAGE> SOURCE, LAYER: MERGED, CHANNEL: GREEN, INVERT CHECKED,, TARGET, BLENDING: ADD, OPACITY: 100%, SCALE: 1, OFFSET: 0, UNCHECKED ALL, (OK)
(with Cyan Channel still selected) IMAGE> APPLY IMAGE> SOURCE, LAYER: MERGED, CHANNEL: BLUE, INVERT CHECKED,, TARGET, BLENDING: ADD, OPACITY: 100%, SCALE: 1, OFFSET: 0, UNCHECKED ALL, (OK)
DOUBLE-CLICK CHANNEL> SET NAME TO "CYAN 6-HUE", COLOR INDICATES: SELECT SPOT COLOR, COLOR: SET TO CYAN, SOLIDITY: 100%, (OK)
(SELECT MAGENTA CHANNEL AT THE TOP SO THAT NO OTHER CHANNELS ARE SHOWING)
IMAGE> APPLY IMAGE> SOURCE, LAYER: MERGED, CHANNEL: BLUE, INVERT CHECKED,, TARGET, BLENDING: ADD, OPACITY: 100%, SCALE: 1, OFFSET: 0, UNCHECKED ALL, (OK)
(with Cyan Channel still selected) IMAGE> APPLY IMAGE> SOURCE, LAYER: MERGED, CHANNEL: RED, INVERT CHECKED,, TARGET, BLENDING: ADD, OPACITY: 100%, SCALE: 1, OFFSET: 0, UNCHECKED ALL, (OK)
DOUBLE-CLICK CHANNEL> SET NAME TO "MAGENTA 6-HUE", COLOR INDICATES: SELECT SPOT COLOR, COLOR: SET TO MAGENTA, SOLIDITY: 100%, (OK)
(SELECT YELLOW CHANNEL AT THE TOP SO THAT NO OTHER CHANNELS ARE SHOWING)
IMAGE> APPLY IMAGE> SOURCE, LAYER: MERGED, CHANNEL: RED, INVERT CHECKED,, TARGET, BLENDING: ADD, OPACITY: 100%, SCALE: 1, OFFSET: 0, UNCHECKED ALL, (OK)
(with Cyan Channel still selected) IMAGE> APPLY IMAGE> SOURCE, LAYER: MERGED, CHANNEL: GREEN, INVERT CHECKED,, TARGET, BLENDING: ADD, OPACITY: 100%, SCALE: 1, OFFSET: 0, UNCHECKED ALL, (OK)
DOUBLE-CLICK CHANNEL> SET NAME TO "YELLOW 6-HUE", COLOR INDICATES: SELECT SPOT COLOR, COLOR: SET TO YELLOW, SOLIDITY: 100%, (OK)
_____________________________________________