Digital BW, The Print

Maybe you guys should use the same image for your tests, like a step wedge
from this lists files?

Are you all using the same operating systems? Do they all implement color
management similarly? in PS are you all using the same color engine for your
conversions, do you all have black point compensation checked (or not) and
dither checked (or not) and are they all set up the same for both PS 6 & 7?

Todd

> Jim,
> 
> Just to check on missing pieces I went back and did the file conversion and
> curve application in both PS6 and PS7 but to sRGB space this time. I used
> the same dark dominant image that gave a median of 44 in both versions of
> PS.
> 
> When I converted to sRGB I got the following:
> 
> PS6: Mean = 80.12, Std. Dev. = 81.25, Median = 37
> PS7: Mean = 79.85, Std. Dev. = 81.50, Median = 37
> 
> The PS6 to PS7 difference is similar to my earlier trial.
> 
> I did notice that when I took each of these converted files through the
> "Print Preview.." dialog in PS7 that the Source Space of the PS7 converted
> file showed up as "Untagged RGB" even though it had been converted to sRGB
> and a check with the "Convert to Profile..." dialog confirmed that it was
> indeed in sRGB space.
> 
> I don't know if any of this is helps but I wanted to get the data point.
> 
> At least the problem is not with your printer if you can still duplicate
> your earlier PS results.
> 
> I remember doing some comparison prints with Paul's curves from both sRGB
> and Adobe RGB awhile back and the differences in the prints was negligible
> at the time.
> 
> Martin
> 
> 
> ----- Original Message -----
> From: "jimhayes361" <jimhayes@...>
> To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
> Sent: Thursday, June 27, 2002 5:32 PM
> Subject: [Digital BW] Re: ps 6/7 bug:print change confirmed
> 
> 
>> Carolyn and Martin, all,
>> 
>> You both make the same very good point, and I'm glad I now know where
>> that feature got hidden. Thanks to both of you. But...
>> 
>> I just ran a third print through using PS7 going through print with
>> preview. I did have to set to "color management"; when I did this the
>> source came up as sRGB and destination came up as same as source. I
>> went to print button from that dialouge and compared the fresh print
>> to the other two, already three hours drying.
>> 
>> I will look at it again after some drying time has passed, but
>> unfortunately, the two PS7 prints match (that is the one done by going
>> through "Print with Preview"--->"color management"---->yada vs the one
>> done earlier just through the "print" dialouge). And both differ from
>> the PS6 print done with srgb as "source" and "same as source" for
>> destination (but in "print" dialouge).
>> 
>> IOW, I get posterization in PS7 using either method, but PS6 gives me
>> my healthy print looking like my Febuary reference print (but done
>> smaller in 8 x 10).
>> 
>> I would also like to update/ change my observations on the differences
>> between the two prints: At a second look, I discover that you DO need
>> to view these two prints under good quality lights, and you would be
>> best to use a very dark print full of 3/4 tones. It shows up slightly
>> above about a Zone V, but moreso Zone IV and below. The posterization
>> is maybe the most visible symptom, but I'll add now that the PS7
>> print dark values also get slightly darker- vaugely 75% now looks like
>> maybe 80%k just to hazard a number. As a second symptom it is
>> detectable.
>> 
>> Can the color space specification have changed for sRGB in PS7 so that
>> it's really being converted to a "different"  sRGB space then Paul
>> had origianally tuned his curve to?
>> Jim H.
>> 
>> 
>> 
>> 
>> 
>> --- In DigitalBlackandWhiteThePrint@y..., Carolyn Frayn
>> <carolynfrayn@s...> wrote:
>>> 
>>> assuming that you need to set your source and print space for these
>>> workflows, this would certainly change your entire print.  It's in
>> the print
>>> with preview dialogue box in PS7.
>>> 
>>> Carolyn
>>> 
>>>> The only difference in the workflows is that PS6 shows me a source
>>>> space and print space addendum to the Epson printer dialogue, and
>> PS7
>>>> has- nothing below the epson printer dialogue box (Win98SE). This
>> is
>>>> the only thing that is apparently different as one goes through
>> the
>>>> workflow in both PS6 and 7.