Digital BW, The Print

Epson 7600, QTR and Gui, UC inks (MK), Hahnemuhle Photorag, Win XP 
Pro, calibrated system.

The 8x10 proof prints I get on Photorag 308 match my monitor and look 
great and as desired. I can then make the same prints on a 24" roll 
of Photorag 188 (same printer, same everything) and get noticeably 
different results; namely, weaker contrast and weaker 3/4 tones. The 
188gsm prints look roughly 1/2 stop or more brighter in the shadows 
compared to 308gsm prints. As I said, everything is the same in 
making both prints. I've never understood otherwise, so I'm assuming 
I should be getting the same print results regardless of paper 
thickness, or am I mistaken? Is it possible that I have bad coating 
on my paper? I've recently started a fresh roll. 

Any help or ideas are appreciated.

Michael
www.mgordonphotography.com

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Michael Gordon" 
<michael_gordon@v...> wrote:
> Epson 7600, QTR and Gui, UC inks (MK), Hahnemuhle Photorag, Win XP 
> Pro, calibrated system.
> 
> The 8x10 proof prints I get on Photorag 308 match my monitor and look 
> great and as desired. I can then make the same prints on a 24" roll 
> of Photorag 188 (same printer, same everything) and get noticeably 
> different results; namely, weaker contrast and weaker 3/4 tones. The 
> 188gsm prints look roughly 1/2 stop or more brighter in the shadows 
> compared to 308gsm prints. As I said, everything is the same in 
> making both prints. I've never understood otherwise, so I'm assuming 
> I should be getting the same print results regardless of paper 
> thickness, or am I mistaken? Is it possible that I have bad coating 
> on my paper? I've recently started a fresh roll. 
> 
> Any help or ideas are appreciated.
> 
> Michael
> www.mgordonphotography.com

The papers ought to be the same but it sure sounds like they are
different somehow.  With a roll its pretty hard to put it in backwards but
I wonder if it isn't coated correctly.   Just to be sure I'd try to print
identically on both to make sure there isn't anything else different.
I'd do the wet lips or lick test to see if its coated correctly.

Roy

On Sep 29, 2004, at 9:09 PM, Roy Harrington wrote:

> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Michael Gordon"
> <michael_gordon@v...> wrote:
>> Epson 7600, QTR and Gui, UC inks (MK), Hahnemuhle Photorag, Win XP
>> Pro, calibrated system.
>>
>> The 8x10 proof prints I get on Photorag 308 match my monitor and look
>> great and as desired. I can then make the same prints on a 24" roll
>> of Photorag 188 (same printer, same everything) and get noticeably
>> different results; namely, weaker contrast and weaker 3/4 tones. The
>> 188gsm prints look roughly 1/2 stop or more brighter in the shadows
>> compared to 308gsm prints. As I said, everything is the same in
>> making both prints. I've never understood otherwise, so I'm assuming
>> I should be getting the same print results regardless of paper
>> thickness, or am I mistaken? Is it possible that I have bad coating
>> on my paper? I've recently started a fresh roll.
>>
>> Any help or ideas are appreciated.
>>
>> Michael
>> www.mgordonphotography.com
>
> The papers ought to be the same but it sure sounds like they are
> different somehow.  With a roll its pretty hard to put it in backwards 
> but
> I wonder if it isn't coated correctly.   Just to be sure I'd try to 
> print
> identically on both to make sure there isn't anything else different.
> I'd do the wet lips or lick test to see if its coated correctly.
>
> Roy

A paper coating defect / problem sounds like a good bet Roy.
I just replaced some Arches Infinity for the same type of reasons. When 
I told them the batch number, they recognized it as a bad lot right 
away.
Michael, you might try the same?
Cheers, John