[alt-photo] Re: Vertical Banding in Prints Produced from Digital Negatives

[Amy Holmes George]

Hi Greg,
Yes thankfully, I'm using the full color set of inks . . . 
Amy

> From: gfrancophoto at gmail.com
> To: alt-photo-process-list at lists.altphotolist.org
> Date: Sat, 20 Feb 2010 23:42:48 -0800
> Subject: [alt-photo] Re: Vertical Banding in Prints Produced from Digital	Negatives
> 
> Hey Amy,
> 
> How many inks are you using?  Just black or full color set?  I have found 
> banding to occur if only using one or two inks... hard to see with your 
> eyes.. but the subtle differences in the UV absorption of each ink can cause 
> the banding on your print when they are blended by the printer.  I had this 
> happen when using just the yellow and black inks in a QTR profile for my 
> Epson R260(since the other inks in the set didn't show much ability to 
> absorb UV in my tests).  But the sum was greater than the parts and I ended 
> up eliminating the problem by using profiles that used all 6 inks.
> 
> Greg
> 
> Message: 9
> Date: Sat, 20 Feb 2010 17:58:12 -0500
> From: Amy Holmes George <amyhgeorge at hotmail.com>
> To: <alt-photo-process-list at lists.altphotolist.org>
> Subject: [alt-photo] Vertical Banding in Prints Produced from Digital
> Negatives
> Message-ID: <SNT131-w41C7A142ED6BDE2F20054ACF450 at phx.gbl>
> Content-Type: text/plain; charset="windows-1252"
> 
> 
> Hello all,
> I would gladly welcome any suggestions you may have regarding a recurring 
> issue. I am printing digital negatives on Pictorico transparency film (Ultra 
> Premium) with an Epson 3800 for use with pt/pd on COT 320 (and exposing in a 
> Nuarc). For some reason, I am seeing a predictable pattern of vertical bands 
> visible only in flat areas of high value such as the sky (please refer to 
> attached jpg). This banding is not visible in the negative?even under 
> magnification, and it is not specific to any one image. To me, the only 
> logical explanation is my printer. So, I have performed a nozzle check, head 
> cleaning and head alignment, but all the test results indicate no problems. 
> I have even wiped down the interior according to the Epson printer manual 
> instructions, and still the problem persists. What could cause this banding? 
> I am out of ideas and feeling rather frustrated . . . help!?
> Thank you,Amy 
> 
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