QTR-Quadtone RIP

Hi Jim,

I'm a little confused about all the combinations you've got.

You have:   "an Epson 7000, K6 inks, and they use the "BW Pro 24, 2001" 
software"
The K6 inks are very new, I don't think it's likely that the old BW Pro 
24 software can run these.
So either it's different inks or different software.  Or maybe they are 
doing it anyway and
that's why the prints are too light  (the K6 inks have more lighter 
inks than the old quad inks).

Metamerism is due to using a lot of color pigments in the prints.  If 
you see a lot of this
with the ImagePrint print quite possibly they are not using the B&W 
mode which solves
most of this.  (This would be the same as using QTR with the Epson 
inks).

You mention using Lustre paper several times.  With UltraChrome inks I 
think you will always
have some of the gloss differential problems unless you spray the 
prints afterward.
Lustre paper is not compatible with the K6 inks or the older piezotone 
quad inks.

The think the first thing to decide is what kind of paper you want.  If 
Lustre then the 7600
with IP or QTR, or the 9800 with K3 inks is the only way to go.  And if 
you have to get rid
of the gloss issue then spraying is needed.    If matte paper is OK 
(personally, I think its the best)
then the K6 route or a piezotone quad solution like Cirrus is what you 
want, unless you can
get the UltraChrome guys to load matte black ink.

The K6 inkset is very nice but you really need to have software that is 
geared for them.
QTR is a easy to set up and inexpensive way to do this.

After all that is settled you should be able to work up a fixed 
correction curve for the new printing
method.  QTR has some tools that allow you to do this using ICC 
profiles and the color
management system instead of Photoshop.

Roy

On Wednesday, February 15, 2006, at 07:22  AM, jimk_clgy_ab wrote:

> Gentleman,
>
> Thank you for the quick replies...
>
> The local print house, using the K6 inset and the 7000, asked me to 
> come back to day to
> try again.  So, I will do that.
>
> As for the metamerism issue, it is an issue with the gallery and, or 
> their clients.  They
> don't want to see this, and they will not sell them if it is present.  
> The metamerism issue is
> present on Epson's Lustre Paper, and the print house that created the 
> images, incorporates
> "ImagePrint RIP" software to produce the prints.  They do not use QTR.
>
> I don't think I am alone with this issue of metamerism at a gallery.
>
> I will try your Photoshop suggestions today with the local K6 printer, 
> and see if I can add a
> correction level to the image.  They showed me a few of their shop 
> samples, and I was
> impressed with the smoothness of the black and white tones from the K6 
> ink set.
>
> Again, I do not know if the software that drives the K6 printer 
> utilizes an early version of
> QTR, and I obviously do not know what it is capable of either, just 
> yet.
>
> I had prints made with the Epson 9800 and the K3 inks, to compare 
> against.  Metamerism
> is not completely gone on the Lustre paper, but gloss differential 
> became apparent.
>
> That said, these issues seem to be minimized, once the image is under 
> glass in a frame.
>
> Thank you again for your suggestions, and I will let you know how 
> today turns out.
>
>
> jim k
>
>
> --- In QuadtoneRIP@yahoogroups.com, "john dean" <deanwork2003@...> 
> wrote:
>>
>>
>> He's right. The ultrachome prints have very good longevity when doing
>> monochrome and with QTR you shouldn't be experiencing metamerism at
>> all. And, if the printer is linearized you shouldn't be seing color
>> content either.
>>
>> If there is no gamma adjustment on their rip (hard to imagine) all you
>>  have to do is make a LEVELS ADJUSTMENT LAYER in Photoshop as he said,
>> do a test, and when satisfied drag that layer into all your files. It
>> sits on top as as seperate layer so you easily get back to where you
>> started and can finese it from there. This is actually something you
>> could do yourself if he will do a couple of small 5"x7" tests for you.
>> This is really a minor problem in the larger scheme of things.
>>
>> I think you will like K6 it is very beautiful.
>>
>> John
>>
>>
>>
>> --- In QuadtoneRIP@yahoogroups.com, "Eric Neilsen Photography"
>> <eric@> wrote:
>>>
>>> Jim, Your image requirements 1-10 can be done with an action in PS,
>>> requiring little time to fulfill. Your images, which have some color
>> ink in
>>> them are showing their colors when moved from light source to light
>> source.
>>> While that might be an issue with absolute color, it does not mean
>> that the
>>> image permanence is questioned.
>>>
>>>
>>>
>>> Rather than trying a curve adjustment, how about a level adjustment
>> to place
>>> the midpoint further down the scale. Or a different curve? All these
>> would
>>> be made with custom profiles from different machine and equipment.
>> Was the
>>> Home town lab ever able to come close? Or did they stop after one 
>>> try?
>>>
>>>
>>>
>>> Your original files are not being damaged by the home town lab if
>> you are
>>> bringing them in on CD/DVD, so if they can adjust your files to
>> match, why
>>> not let them?
>>>
>>>
>>>
>>>
>>>
>>> Eric Neilsen Photography
>>>
>>> 4101 Commerce Street
>>>
>>> Suite 9
>>>
>>> Dallas, TX 75226
>>>
>>> http://e.neilsen.home.att.net
>>>
>>> http://ericneilsenphotography.com
>>>
>
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> Yahoo! Groups Links
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>
-
Roy Harrington
roy@...
Black & White Photo Gallery
http://www.harrington.com