Re: "speckling" v "staining " (was New Orleans/glut) SEE SCANS

Hi Chris

When I started to do gum I had like many others all the beginners’ troubles.
I think one of the hard parameters is to get the sizing right.

Glutaraldehyd with River BFK (and the articles by Judy in Post-factory
Photograhy issue #1) was for me the road to my first successful gum
printing.

I brush gelatine and glut hardener separately.

No staining and no speckling.

In Denmark you can buy Glutaraldehyd - 25 % - in the drugstore - it is sold
for curing warts (?) - In small bottles with 30 ml.

Roman Sokoler

I have been using Rives BFK together with glutaraldehyd and I find no
problems
----- Original Message -----
From: "Christina Z. Anderson" <zphoto@montana.net>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Wednesday, September 07, 2005 3:56 PM
Subject: Re: "speckling" v "staining " (was New Orleans/glut) SEE SCANS

> Thank you, Mark, for your nice scans!
>
> Loris, the "student" was Don Bryant, sized paper, and Mark Nelson,
> coating. The amount of sensitizer was equal in both and very low--I only
> use the equivalent of 7% am di.
>
> Mark, you have inspired me to size some Rives with glut...it'll be a fur
> piece down the road, but by next semester I will do so, as you are
> absolutely right that I need that variable. I have sized FAEW with
> glyoxal already, but not that you were able to coat while you were here.
>
> If glut WORKS with Rives BFK then it will even moreso prove my point. If
> it doesn't, then I would consider Rives not a beginner's choice of paper.
>
> Don is currently going to test glut...on Rives, Don?
>
> I think the images show the point that with all things being equal, a
> beginning student will have a MUCH easier time learning how to gum print
> when combining a correct size with an easy paper. IMHO, glut and FAEW is
> just the ticket.
>
> Mind you, Don is way less "loosey goosey" than I am with his technique in
> alt process. If I had sized the paper I would assume that it was operator
> error, but because both Don and I have had this experience with
> size/paper, and I have similarly seen glyoxal be gritty on FAEW, I just
> don't see a reason to use glyoxal as size of choice. Those who are happy
> with it, keep on keeping on. It's not like glyoxal is the devil
> incarnate.
> Chris
>
> ----- Original Message -----
> From: <Ender100@aol.com>
> To: <alt-photo-process-l@sask.usask.ca>
> Sent: Wednesday, September 07, 2005 12:57 AM
> Subject: Re: "speckling" v "staining " (was New Orleans/glut) SEE SCANS
>
>
> Hi Chris,
>
> regarding the infamous speckles. As mentioned, there were two papers
> coated
> used:
>
> Fabriano Artistico Extra White with Gelatin sizing hardened with
> Gluteraldehyde
>
> Rives BFK with Gelatin sizing hardened with Glyoxal
>
> The Rives BFK is a more textured paper than the Farbriano—I do not know if
> it
> was cold press or what, but had obvious more texture.
>
> I wondered if the paper had been scuffed when sized, causing the peaks of
> the
> texture to not clear, however when I looked at it with a loupe, it
> appeared
> that the "speckles" are located more in the valleys of the texture. Then
> I
> wondered if it was just loose pigment gathering in the valleys, but that
> isn't
> true because when they were developed in the water, I tried to remove the
> "speckles" with a spray and abrasion and it wouldn't go away. The area
> that of
> the RIVES that I scanned is the area under the most dense steps of the 31
> film
> step tablet (not digital step tablet) that received relatively no
> exposure...
> there was no indication of "tone" at all at those steps or on the
> Artistico at
> the same steps. So whatever occured, happened without exposure and was
> fairly even all over the paper regardless of how much exposure it
> received.
>
> Here are the links to the two spectacular speckled scans for you to
> speculate
> upon:
>
> Frabriano Artistico Glut & Rives BFK Glyoxal at 3x
> Rives BFK Glyoxal at 24x
>
> I do also recall rather vividly when feeling the papers before coating
> them
> that the Fabriano had a smooth feel while the Rives had a gritty feel.
> Very
> much like when you spray something very lightly with a varnish and the
> tiny
> droplet dry and leave a rough feel to the surface...or a very fine grit
> sandpaper.
>
> These are just my observations and I draw no conclusions. I would like
> to
> have seen the same to papers with the hardners reversed. However, I
> would
> probably not waste my time and just go with the Fabriano sized in the
> manner it
> was, because it printed beautifully. Not as sharp as PT/PD, but not bad—
> hehehehe
>
> Best Wishes,
> Mark Nelson
> Purchase the eBook & PDN System for Your Own Custom Digital Negative
> Workflow
> @
> Precision Digital Negatives
> PDN's Own 31-Step Tablet Now Available—produced by Stouffer Industries
> Coming Soon—Curve Calculator II will let you choose your toes!
> www.MarkINelsonPhoto.com
>
>
> In a message dated 9/6/05 9:41:26 PM, zphoto@montana.net writes:
>
>
>> I sent some images to Darryl (thanks, Darryl) but have to await Mark
>> sending
>> scans of the two Stouffers to Darryl to see speckling, unless I can find
>> a
>> speckled image amongst my stuff.
>>
>
>
>
>
>
>
>
>
>
Received on Wed Sep 7 08:24:47 2005