Digital BW, The Print

Todd, how many pixels did you feather your mask for the blacks?

I'll try this!

Jerry



Todd Flashner wrote:

> Here I go, answering myself, as usual. Okay, after I wrote the stuff below I
> happened two print two grayscales which overlapped, and sure enough, max
> black was denser where the two overlapped. So I tried it on an image that
> has some large black expanses - the one I used for the first piezo exchange
> in fact. Yes, rather noticeable difference.
>
> Ya hearin' me Jerry? BLACKER BLACKS! Perfect registration on my 1160 with
> the paper guide set just snug.
>
> It's all in the right mask. Where you allow the overprint to cut off, and
> curtail spill-over into unwanted areas. I happen to like masks, but for
> those who don't, but like good blacks, this might be reason enough to pull
> that PS book off the shelf for review. ;-)
>
> Todd
>
> > Well, I got the feeling if the print were being back-lit the extra density
> > would have made a difference, but once enough is put down to be opaque over
> > the paper, the only way at that point to increase depth would be to add
> > gloss, to change it's reflectivity. What was happening in my case was that
> > the more tones of "black" I included in my image, the more they blocked up,
> > and detail was lost, yet just hitting the true blacks with a second pass was
> > too minimal to matter.
> >
> >
> >> Todd, I've also noticed that SOME times you can indeed get a perfect
> >> registration. I couldn't hardly believe it. It sure is odd you didn't
> >> get any denser blacks with a second pass. Guess the ink was really black, no?
> >>
> >> J
> >
> >>
> >> Todd Flashner wrote:
> >>
> >>> Regarding multiple passes of the same sheet on a press, I did try running a
> >>> print through my 1160 twice to try to lay down a denser black. First I ran
> >>> the print through as normal, then I made a mask which allowed for printing
> >>> only of the lower values of the print. I wanted to leave the mid tones and
> >>> highlights alone on the 2nd pass, but double up the blacks. Good news and
> >>> bad. Good: perfect registration (if anyone is going to try this I recommend
> >>> you do immediately successive passes on the same printer, so that the paper
> >>> guide and everything is exactly as it was on the first pass. Bad: no visible
> >>> density difference. Now if I did two passes over the entirety of the print
> >>> it'd double the density, and the whole print would be (was) a stop darker,
> >>> but by just doubling up the blacks *I* did not see the benefit.
> >>>
> >>> Oh well...
> >>>
> >>> Now, if you could/can get exact registration on two printers you could do
> >>> some very interesting toning effects by printing colors over quads, for
> >>> instance. Not that any one should want to, but it does make for some
> >>> interesting possibilities.
> >>>
> >>> Todd
>
>
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