Changing parts of my image to Half TONES

1409 Views 5 Replies 5 Participants Last post by bornover, Aug 22, 2010

tooleedoo

Discussion Starter · Aug 21, 2010

i WANT OT CONVERT PARTS OF AN IMAGE TO HALF TONES. I UNDERSTAND CHANGING THE WHOLEIMAGE TO A BIT MAP THEN CONVERTING TO A HALF TONE.. THATS NOT WHAT I NEED.. LETS SAY THERE WAS WINNIE THE POO. TIGER AND PIGLET WALKING INT THE SUN.. WE KNOW THE COLORS ARE BLACK RED ORANGE YELLOW AND PINK FOR PIGLET.... TO SAVE A SCREEN I CAN TKE THE PART THATS PINK MAKE IT A HALFTONE DOT IN RED SCREEN AND WHEN IT PRINTS IT WILL LOOK LIKE A PINK.. THATS WHAT iM NOT BEING ABLE TO DO. iF I SELECTED THE PARTS THAT WOULD BE PINK HOW DO I TAKE THE SOLIDE PINK AND CONVERT THAT AREA INTO DOTS AND APPLY IT TO THE RED FILM.. THE GOAL IS TO TAKE A SCREEN AWAY (pink screen)...

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Fauxfax

· #2 · Aug 22, 2010

I understand what you are asking but I'm not personally confident that this would be worth doing (in this example). Disney would sue your *** unless you had a license and in order to get that you would need to create the proper Process type image. I don't think this idea, for various reasons including the result, would pan out well for you in Spot colour.
Piglet is actually many colours because Pooh is now CG, so piglet is various shades of mauve through to pink.
Anyway -
You can select an area in Photoshop with the magnetic lasso tool or polygonal lasso tool and then do filter/sketch/halftone pattern. Keep it selected and then do image/adjustments/colour balance and adjust it to red. Unselect.

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BroJames

· #3 · Aug 22, 2010

I think the characters are used only as an example so we know what he is talking about. The filter, sketch, halftone can be used to create halftones but it is not the accepted way of converting to halftone for screen printing. You have to copy the selected layer to a new file, convert to greyscale, then to bitmap. You will then be prompted to select the angle and the lpi among others. Afterwards, you copy the halftoned layer back to the original file.

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whimsywhit

· #4 · Aug 22, 2010

Do you have a postscript printer? Are you using illustrator? What version windows are you running? When I upgraded to windows 7, the same postscript printer I've used for a year now started working differently. In illustrator, you can select your spot red, and change the color to a percentage. When you print, under the seperations menu, change your dpi to 45 to 55 for the red, whichever you prefer. The smaller the number, the more visible the dot pattern. In your printer setup, make sure the speed setting is for eps and not optimized for output. It took me forever to locate that setting. In freehand, you actually have a panel for controlling different dpi's for different parts, but for the printing part, you only have to adjust the optimize for output to eps option in your printer settings.
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whimsywhit

· #5 · Aug 22, 2010

All that I just posted works for vector images, not sure if that's what you were looking for.

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bornover

· #6 · Aug 22, 2010

BroJames said:
You have to copy the selected layer to a new file, convert to greyscale, then to bitmap. You will then be prompted to select the angle and the lpi among others. Afterwards, you copy the halftoned layer back to the original file.

The way Angel said is the right way in my opinion.

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