Re: New Image Tru 'Nembra 's Pipes 2005-05-03 - By Andrew
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Most printing presses use a postscript that is generated by a RIP
process. Depending on the quality of the software that you use for
the RIP, it should make a suitible half-tone (little dot pattern)
image for the black ink to use. So if you do prepare something for a
printing press, you really shouldn't worry about increasing the grain
on the image, however, you should ask to see a proof if you want to
assure yourself that there isn't a problem. Photocopy machines also
perform a RIP but they tend to be highly inacturate and usually
perform their operations for speed instead of quality.
In a CYMK printing like a home inkjet printer, the grey tones are made
through a composite of each of the four color inks. This makes a
greyscale image look really good, but is processed and the same as a
full color image of the same.
AWBenson
--- In Carrara@(protected), "Andi Newton" <andin@(protected)> wrote:
> Thanks for the info, Bob! That really helps. I did apply a diffuse glow
> filter to this image in Photoshop to soften it, but kept the grain
down; I
> played with the film grain filter, too, but was afraid that making
it really
> grainy would cause it not to print well. Guess my thinking was
backward,
> huh? I will definitely remember this for next time.
>
> Does the same hold true for regular printing, that you need to make it
> grainy and then sharpen? Or is it just that the publisher is doing this
> particular book on a photocopier? I co-wrote, edited, and
illustrated a book
> last year that used CG images, and there were no problems printing
them.
> Everything looked fine, so the problems with these images really
took me by
> surprise.
>
> Thanks again!
> Andi
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