[alt-photo] Re: PT/PD: TIME BETWEEN COATING AND PRINTING

[Mark Nelson]

Not at 75 mph driving the interstate!! 

Hehehe

With time pt/pd emulsion loses speed after coating given the same amount of moisture in the emulsion---- one reason not to coat one day and print the next. 

All things being equal the effect of moisture in the emulsion & paper at the time of exposure has a huge effect on the scale and richness of the blacks. 

Too much moisture and the blacks suffer due to printing out masking.  The exposure scale lengthens. 

Too little moisture and you get reversal and poor blacks and shorter scale. 

You have to keep it the same for each print. 

Longer response because I am at 0 miles per hour in my hotel room. 

Good luck Bob!

Mark Nelson
www.PrecisionDigitalNegatives.com
PDNPRint Forum @ Yahoo Groups
www.MarkINelsonPhoto.com

sent from my iPhonetypeDeviceThingy

On Jun 7, 2012, at 10:23 AM, "BOB KISS" <bobkiss at caribsurf.com> wrote:

> DEAR MARK,
>    C'mon, can't you be more concise?  Why those long drawn out answers?
> Richard Knoppow will get jealous!  (Just kidding, Richard!  Love your
> thorough and informative replies!)
>        (hehehe)
>            BOB
> 
> -----Original Message-----
> From: alt-photo-process-list-bounces at lists.altphotolist.org
> [mailto:alt-photo-process-list-bounces at lists.altphotolist.org] On Behalf Of
> Mark Nelson
> Sent: Thursday, June 07, 2012 10:16 AM
> To: The alternative photographic processes mailing list
> Subject: [alt-photo] Re: PT/PD: TIME BETWEEN COATING AND PRINTING
> 
> Yes. 
> 
> No. 
> 
> Mark Nelson
> www.PrecisionDigitalNegatives.com
> PDNPRint Forum @ Yahoo Groups
> www.MarkINelsonPhoto.com
> 
> sent from my iPhonetypeDeviceThingy
> 
> On Jun 7, 2012, at 10:01 AM, "BOB KISS" <bobkiss at caribsurf.com> wrote:
> 
>> DEAR LIST,
>> 
>>           My usual procedure which, I believe, confirms to the practice
>> described in most of the books and other practitioners, is to coat my
> PT/PD
>> DOP paper, dry it, re-humidify it and then print immediately.  What
>> sometimes happens is that my workflow is interrupted and I either expose &
>> dev the paper later that day or even the next day.
>> 
>> 
>> 
>>           QUESTIONS:
>> 
>> 1)    Have any of you found a significant change in speed, contrast,
> d-max,
>> etc from delaying between coating and printing?
>> 
>> 2)    Do any of you purposefully and regularly pre-coat paper then use it
>> the next day or days later?
>> 
>> 
>> 
>> I remember when I first started I used that pre-made paper (by Sura
>> Steinberg and her hub) and that must have been at least
>> 
>> weeks old between coating and my printing with it.
>> 
>>           Anywho, any thoughts on this?  Just curious, not critical.
>> 
>>                       CHEERS!
>> 
>>                                   BOB
>> 
>> 
>> 
>> Please check my website:  <http://www.bobkiss.com/>
> http://www.bobkiss.com/
>> 
>> 
>> 
>> 
>> "Live as if you are going to die tomorrow.  Learn as if you are going to
>> live forever".  Mahatma Gandhi
>> 
>> 
>> 
>> _______________________________________________
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