[Alt-photo] Alt-photo-process-list Digest, Vol 155, Issue 6

Bob Cornelis bob at colorfolio.com
Mon May 8 02:12:58 UTC 2017


Thanks Mark!

Some interesting information here, I didn't realize I could use a lot less
pressure on my Nuarcs - I've been cranking it up to a little over 20.

Bob


On Sun, May 7, 2017 at 5:17 PM, Mark Nelson via Alt-photo-process-list <
alt-photo-process-list at lists.altphotolist.org> wrote:

> I ran tests for Mitsubishi/Pictorico before they released the "newer"
> Ultra Premium Film.
>
> Negative Drying or Curing times will vary with the film you use.
>
> Curing time also varies with the brand of ink and the color of ink you use.
>
> Some printers have a much longer curing time, such as the old R1800
> printers.  They were notorious for picking up dust that would flake off and
> leave pinholes in the negatives.
>
> As negatives cure, they lose density. I tend to make negatives one day and
> print them the next day with no worries.
>
> You can hurry up curing with heat, such as from a hair dryer.  I sometimes
> lay mine on my light table.
>
> You can read the changes in density as the colors cure with a UV
> Densitometer.
>
>
>
>
> As far as negatives sticking to the paper or plate material,  it is a
> factor of:
>
> 1.  How long the negatives/positives have cured.
> 2.  What material or paper you are printing on.
> 3.  How long you have let the coated paper dry and if you have avoided
> "runs".
> 4.  How much pressure you use in the vacuum frame.  5-10 on the NUARC is
> plenty.
>
> Hope this helps.  Depending on your practice and the above variables, the
> answer to the original question can vary.
>
> Best Wishes,
> Mark Nelson
>
> www.PrecisionDigitalNegatives.com
> PDNPRint Forum @ Yahoo Groups
> www.MarkINelsonPhoto.com
>
> Curve Calculator III for the Mac is Now Available
>
> sent from my iPhonetypeDeviceThingy
>
> On May 7, 2017, at 3:33 PM, alt-photo-process-list-
> request at lists.altphotolist.org wrote:
>
> >>
> >> How long have you found you need to let negs sit before using them
> without
> >> adverse consequences?
>
> _______________________________________________
> Alt-photo-process-list | altphotolist.org
>



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