[alt-photo] Re: coffee and cyanotype

[Mark Nelson]

Donuts?

Mark Nelson
www.PrecisionDigitalNegatives.com
PDNPRint Forum @ Yahoo Groups
www.MarkINelsonPhoto.com

sent from my iPhonetypeDeviceThingy

On Jan 13, 2012, at 1:57 AM, "Paul Viapiano" <viapiano at pacbell.net> wrote:

> Is Rob talking about gum prints or cyanos, or...?
> 
> Interesting...
> 
> Paul
> 
> 
> 
> ----- Original Message ----- From: "Christina Anderson" <zphoto at montana.net>
> To: "Alt List" <alt-photo-process-list at lists.altphotolist.org>
> Sent: Thursday, January 12, 2012 7:49 PM
> Subject: [alt-photo] coffee and cyanotype
> 
> 
>> Interesting post from 2004:
>> 
>> 
>> From: RHobbs3 at aol.com
>> Date: 09/09/04-06:34:42 PM Z
>> Message-id: <e5.a9def0.2e7250a2 at aol.com>
>> I have used old cold coffee for my first wash. Coffee has an amazing
>> collection of acids, which change depending on the darkness of the roast. If I cover
>> the print with coffee and let it sit for a minute or five then proceed with
>> the wash, my final blue shifts toward gray or black. I suspect the tannic acid
>> in the java is what does this.
>> For some reason, I get less staining of the paper base this way than I do if
>> I make the print first and tone in coffee later.
>> 
>> Rob Hobbs
>> Christina Z. Anderson
>> christinaZanderson.com
>> 
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