Re: carbon-digest V2 #115

Thanks for the advice. I ordered some glycerin from
Artcraft today, and will reply with a dry climate
formula once I have good results. I had tried
increasing the sugar, but maybe after a certain point
I was just making crackly black candy. The litho film
sounds promising too, but I am going to try the
bristol I have again since I did get fair results a
couple times, I just battled the dryness of the
tissue.

Regards,

Claude

--- carbon-digest <owner-carbon-digest@spitbite.org>
wrote:

>
> carbon-digest Monday, September 12 2005
> Volume 02 : Number 115
>
>
>
> Please DO NOT QUOTE the entire digest when replying
> to a posting,
> only quote the message you are replying to.
>
> Included in this issue:
> [carbon] material for tissue in dry climates
> Re: [carbon] material for tissue in dry climates
> Re: [carbon] material for tissue in dry climates
>
>
----------------------------------------------------------------------
>
> Date: Mon, 12 Sep 2005 08:28:43 -0700 (PDT)
> From: Claude Sapp <claudesapp@yahoo.com>
> Subject: [carbon] material for tissue in dry
> climates
>
> The tissue I have been making has been really hit or
> miss. I have been using Strathmore Bristol Vellum
> and
> coating with a Knox gelatin watercolor mix. I live
> in
> Nevada where the humidity is sometimes in the single
> digits - VERY dry out here. The carbon tissue I have
> made curls badly and is stiff as a shingle after
> drying. I tossed my last batch because of this. I
> tried using some palstic that I found in the WalMart
> fabric section, but after the gelatin dries, it too
> puckers and curls, and is damaged when one tries to
> use it.
>
> So, I am asking for suggestions to adapting the
> process to dry climates. Any better support papers?
> I
> like the idea of the plastic, but the results for me
> were not any successful.
>
> This is my first posting to this list, and I only
> started exploring the carbon process this summer.
> This
> list has been a great resource, thanks.
>
> Regards,
>
> Claude
>
> // Claude Sapp
> // telephone (001) 775 247 5362
>
> ------------------------------
>
> Date: Mon, 12 Sep 2005 11:54:35 -0400
> From: Sandy King <sanking@clemson.edu>
> Subject: Re: [carbon] material for tissue in dry
> climates
>
> Hi Clause,
>
> Add glycerine to the pigmented gelatin. In a very
> dry climate I would
> suggest adding up to 20ml of glycerine per liter of
> pigmented
> gelatin. This is in addition to sugar, which I
> always add at about
> 25g/L per liter of pigmented gelatin.
>
> In a very humid climate glycerine should not be
> added as it will make
> the tissue virtually impossible to dry. In my own
> working conditions,
> where the RHy is on the order of 45% in the winter
> and 60% in the
> summer I vary the amount of glycerine from a low of
> 5g/L to as high
> as 20g/L.
>
> When you add glycerine check the condition of the
> tissue very
> carefully before exposing to make sure that it is
> bone dry. If you
> expose before the tissue is completely dry you risk
> ruining your
> negative. Which brings me to suggest that you always
> expose with a
> piece of mylar between the tissue and negative.
> Better to ruin a
> piece of mylar than a valuable negative.
>
> Good luck,
>
> Sandy
>
>
>
> I live in South Carolina where the humidity is very
> high in the summer months
>
> >The tissue I have been making has been really hit
> or
> >miss. I have been using Strathmore Bristol Vellum
> and
> >coating with a Knox gelatin watercolor mix. I live
> in
> >Nevada where the humidity is sometimes in the
> single
> >digits - VERY dry out here. The carbon tissue I
> have
> >made curls badly and is stiff as a shingle after
> >drying. I tossed my last batch because of this. I
> >tried using some palstic that I found in the
> WalMart
> >fabric section, but after the gelatin dries, it too
> >puckers and curls, and is damaged when one tries to
> >use it.
> >
> >So, I am asking for suggestions to adapting the
> >process to dry climates. Any better support papers?
> I
> >like the idea of the plastic, but the results for
> me
> >were not any successful.
> >
> >This is my first posting to this list, and I only
> >started exploring the carbon process this summer.
> This
> >list has been a great resource, thanks.
> >
> >Regards,
> >
> >Claude
> >
> >// Claude Sapp
> >// telephone (001) 775 247 5362
> >_______________________________________________
> >Post to the list as PLAIN TEXT only - no HTML
> >carbon mailing list
> >carbon@spitbite.org
> >FAQ at http://spitbite.org/carbon/list.html
>
> ------------------------------
>
> Date: Mon, 12 Sep 2005 09:18:22 -0700
> From: Vaughn Hutchins <vgh7001@humboldt.edu>
> Subject: Re: [carbon] material for tissue in dry
> climates
>
> hello Claude,
>
> I will echo Sandy's comments -- the glycerin will
> help (additional sugar
> will also help if you don't have the glycerin)
>
> And living in a humid climate I have ruined a couple
> negatives by having
> too much glycerin in the mix. (I just wave the
> glycerin bottle over the mix
> now to give it a bit of a scare.) It was an
> interesting experience trying
> to seperate an 11x14 neg stuck to the tissue after
> exposing -- I accidently
> ripped the negative in half trying to pull the two
> apart. It was during an
> in-class demo...quite dramatic! Fortunately, I had
> taken two negs of the
> same scene and had ruined the lesser of the two.
>
> For the tissue support I use used litho film that
> our students toss out --
> the .004" stuff. I found the .007" stuff too stiff
> (hard to maintain good
> contact with the negative during exposure.) I have
> used the same pieces of
> litho film 20+ times. Nice to be able to reuse
> material instead of buying
> and tossing it out after one use. Freestyle sells
> litho film in all sizes
> if you can't find used (for 8x10 negs, you can get
> litho film in 8.5"x11"
> for 100 shts for $53 -- and that should last you a
> lifetime of carbon
> printing...your results might differ.)
>
> I get a minimum amount of curl with the litho film,
> but a pourous support
> does have its advantages (eg. tissue dries faster).
>
> Have fun!
>
> Vaughn
>
> ------------------------------
>
> End of carbon-digest V2 #115
> ****************************
>
>

// Claude Sapp
// telephone (001) 775 247 5362
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Received on Tue Sep 13 16:05:17 2005