Re: Waxing Paper+Brown Cyanotypes

Hi:

The easiest toner for cyanotypes is a tannic acid toner. It tones them a
reddish brown.

Two baths are used, sodium carbonate in one and tannic acid in the other.

The cyanotype is first bleached in the sodium carbonate and then toned in
the tannic acid.

The strneght of the tone is dependent upon how long it is left in eack
solutions, how long it is bleached and how long it is toned.

If you use a water bath you can rinse the print and bleach and tone and
bleach and tone for a variety of effects.

A nice consumer source of sodium carbonate is washing soda, for tannic
acid - a strong tea.

I recently made a cyanotype T-shirt. I wasn't sure how it would go
through the wash - cyanotype get bleached with an alkali - like
laundry detergent.

Sure enough my shirt is bleached. I'll try toning it since I've already
bleached it.

Gord

On Thu, 21 Nov 2002 BenDuross@aol.com wrote:

> Hello
> I posted a message earlier today about waxing photopaper or injet photopaper, the reason I want to wax the paper is to make cyanotypes.
> Also could anyone tell me how to go about making my cyanotypes brown.
> Thanks
> Ben
>
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---------------------------------------------------------
Gordon J. Holtslander Dept. of Biology
holtsg@duke.usask.ca 112 Science Place
http://duke.usask.ca/~holtsg University of Saskatchewan
Tel (306) 966-4433 Saskatoon, Saskatchewan
Fax (306) 966-4461 Canada S7N 5E2
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Received on Thu Nov 21 18:18:16 2002