Re: Cyanotype and substrate chemistry

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From: Robert W. Schramm (schrammrus@hotmail.com)
Date: 05/06/01-12:34:26 PM Z

Mac,

 

I don't know what bleach you are using but if it is chlorox, I seem to recall; from its slippery feel that it is probably a strong alkali. Thus you must get all of that out of the cloth. A rinse in a mild acid solution would seem appropriate. Also I assume that the denhim cloth is natural fiber. My experience has been that only natural fibers work with cyanotype.

Bob Schramm

>From: Mac Legrandi
>Reply-To: alt-photo-process-l@sask.usask.ca
>To: alt-photo-process-l@sask.usask.ca
>Subject: Cyanotype and substrate chemistry
>Date: Sat, 05 May 2001 21:23:41 -0700
>
>ello!
>
> have a project to print clasic Cyanotype on ond denim clthing. These are old, most likely have waxes/oils/grime in the fibers.
>
>i will first bleach the denim as white as I can get them. Wash with regular detergent.
>
>My question revolves around preparing the substrate material to best suit the cyanotype chemistry.
>
>1) Is there any chemical neutralization other than washing to remove the traces of the bleach?
>
>2) Is there a ph I should be going for in the fabric to optimize the cyanotype? Maybe add some Citric Acid to the final fabric wash?
>
>Thanks!
>
>Mac
>
>
>
>
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