[alt-photo] Re: Alt-photo-process-list Digest, Vol 81, Issue 2

[walter]

Hi, I'm new to the list.  I actually came here looking for a solution
to the same problem, and I think I also used a bit too much gum (more
inadvertently though; my dichromate working methods have been a bit
inconsistent since I mix up small batches for single printing
sessions).  Because of the time involved I haven't tried to print
again since then (last week) but I'm glad to see you've found that to
be a culprit.  It sounds like exactly the same scenario I was facing.

Now, I'm going to mix up a bottle of saturated K-dichromate to keep
that variable constant.  Have any of you used plastic bottles?  I'm
having trouble finding brown glass bottles but the drug store gave me
a couple of plastic ones used for dispensing cough syrup / liquid
medication.  Would any of you seasoned gum printers recommend skipping
that and ordering some glass ones?  I know where to get them but I'm
sort of intensely trying to work out the printing methods right now
and I don't want to wait the week or two for a delivery.

-Walter


On Wed, Mar 3, 2010 at 4:00 AM,
<alt-photo-process-list-request at lists.altphotolist.org> wrote:

>
>> I was attempting to produce very saturated layers and in that attempt, I
> increased the gum concentration in order to accommodate (without staining),
> the amount of pigment that was required. Once I reduced the gum and pigment
> concentration, the adhesion was improved and the top layer behaved. <
>
> Happy for you!
>
>> I still have no understanding as to why there were no problems with these
> thick layers when laying down the cyan layer first. <
>
> Could be something about the structural/physical properties of the specific
> pigments that you were using or something else, who knows? Don't dig too
> much, go for the image! ;)