[Alt-photo] digital neg drying

David Christensen agitprop at telus.net
Sun May 7 20:02:14 UTC 2017

Perhaps to sharper eyes than mine but I can't say I've noticed any 
difference in the final carbon print whether I've dried the negative 
overnight or after five minutes. I live in a dry climate and the RH is 
pretty consistent throughout the year - if I remember to do it, I try to 
print the digital negative the day before- just to be on the safe side.


On 2017-05-07 1:48 PM, `Richard Knoppow via Alt-photo-process-list wrote:
>    I am not familiar enough with the material used for digital 
> negatives but if its anything like conventional film you want to avoid 
> drying it too fast.  I assume its the ink that needs to be dried. Bob 
> lives where the RH is mostly pretty high so some warming of the air 
> will help drying. In Los Angeles the RH varies all over the place from 
> tropical to desert. When we have our driest weather I have had roll 
> film dry in ten minutes just hanging up. When it gets humid, as it is 
> now, it may take many hours.
> On 5/7/2017 12:33 PM, Bob Cornelis via Alt-photo-process-list wrote:
>> David
>> Thanks for sharing your experience.
>> I was also curious if the only criteria for the neg being ready to 
>> use is
>> that it not stick to the coated paper or if there are other qualities 
>> that
>> change over time that can make a difference.
>> Any thoughts?
>> Bob
>> On Sun, May 7, 2017 at 11:14 AM, David Christensen via
>> Alt-photo-process-list <alt-photo-process-list at lists.altphotolist.org>
>> wrote:
>>> Bob - I've been printing digital negs on a 1430 using Pictorico 
>>> Ultra and
>>> Piezography inks.  After about five minutes, I use a hairdryer on a low
>>> cool/warm setting and move it over the neg about 10 inches away for 
>>> three
>>> minutes.  I've had no problems with the neg sticking to the carbon 
>>> tissue
>>> I'm using.
>>> David
>>> On 2017-05-07 11:13 AM, Bob Cornelis via Alt-photo-process-list wrote:
>>>> I usually try to let my digital negs sit overnight to "cure" but
>>>> sometimes,
>>>> especially when doing a lot of testing, that is really inconvenient.
>>>> How long have you found you need to let negs sit before using them 
>>>> without
>>>> adverse consequences?
>>>> I've sometimes used a hair dryer on the back of the negs, but I 
>>>> have no
>>>> idea how long to do that or if there is some sign that the neg is 
>>>> ready
>>>> for
>>>> use when accelerating the process that way.
>>>> I'm using an Epson 11880 on Pictorico Ultra film with both QTR 
>>>> (pt/pd) and
>>>> straight driver (cyanotype).
>>>> Thanks
>>>> Bob
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