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Old May 6th, 2008 -   #92 (permalink)
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Default Re: Process screen printing - Photos

Quote:
Originally Posted by darwinchristian
i realize my line of questioning is vague. i apologize. i guess i'm just looking for any tips before i spend the next month vigorously testing everything.
Your problem is that the smallest dots are burning away. The "easy" answer it to drop the LPI of the halftone. Drop own to a 35 LPI and all of the dots will be big enough not to get lost.

It is possible to modify the artwork not to need calibrating with a transfer function, by adjusting the output levels in the levels dialog box.

There is a downside to using the levels command, rather than a transfer function. By using a levels command, something you want to be printed BLACK would be output using a 90% screen. By using the transfer function, BLACK would be printed at 100%, which would cause an intentional over saturation of ink. While a transfer can give 110%, at 90% it would yield 90%.

The issue with using levels is that it will take as much testing to determine the correct value as you would using a transfer function.

If you have photoshop, it should only take a day. Your already very close.

The only thing which might take you a month is to find a good tutorial on how to use a transfer function in a program other than photoshop. I just attempted to find a tutorial on the subject and couldn't come up with anything.

fred
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