U of S | Mailing List Archive | alt-photo-process-l | Re: Demachy and red chalk

Re: Demachy and red chalk

It occurred naturally.

Mark Nelson

www.PrecisionDigitalNegatives.com, PDNPrintForum@YahooGroups, www.MarkINelsonPhoto.com
, sent from my iPhone

On May 23, 2009, at 12:36 AM, Loris Medici <mail@loris.medici.name>

But won't you get something more like pink (instead of red) if you mix
chalk and red iron oxide?


23 Mayıs 2009, Cumartesi, 4:14 am tarihinde, ender100 yazmış:

I think you are right.  If I remember, the Red Chalk or Sanguine
was a
special chalk that had a lot of iron oxide in it.

Were the Demachy prints in this color gums or photogravures?
Best Wishes,

Mark Nelson
Precision Digital Negatives
PDNPrint Forum @ Yahoo Groups

Mark Nelson Photography

On May 22, 2009, at 8:10:22 PM, "Christina Z. Anderson"
<zphoto@montana.net> wrote:

Try Venetian red, Indian red, or red ochre.  It was a red iron oxide
pigment if I remember correctly. One recipe calls for 3 g. Venetian
powder to 1/2 oz. gum. Another calls for a pigment called "light red"
which I know was available about 10 yr ago anyway.  But Venetian
Red is a
nice brick-y color that you'd be happy with. My notes say this:  "For
instance, a Venetian red or red ochre color  was used to
approximate the
rust colored conte crayon portraits."