Yahoo Groups archive

QTR-Quadtone RIP

Index last updated: 2026-04-28 23:12 UTC

Message

Re: [QuadtoneRIP] Re: Banding On the Epson P800

2017-02-07 by Roy Harrington

Efo,

I looked at your image. It's subtle but I think I see what you are talking about. I'm guessing
its a 4inch scan at 600ppi, with source also at 600ppi. It is strange and hard to tell what's
actually going on. It kind of strikes me as a beat pattern or moire between different frequencies.
For instance 720 (the epson and qtr) vs 600 (your file) might show something at about 1/6 inch
(720-600/720). I can't really explain what this would do -- but I avoid things like this.
You don't state it but I'd always use 2880dpi.

I'm also curious about your image where it looks like dithering of gray values. Why is this
dither look? Why not gradient of grays?

Roy


On Mon, Feb 6, 2017 at 10:34 AM, efo@... [QuadtoneRIP] <QuadtoneRIP@yahoogroups.com> wrote:


In case anyone is desperate to see what the negative produced on the p800 looks like, I just uploaded an image to the misc files area. It doesn't suggest anything specific to me, and it is indeed subtle.




--

Attachments

Move to quarantaine

This moves the raw source file on disk only. The archive index is not changed automatically, so you still need to run a manual refresh afterward.