Re: Clues From Echague. One.
John, thanks for sharing.
When I saw mucilage, the first thing that came into my mind was
Agar-Agar, I was preparing to write a question if Agar-Agar is a good
option for this purpose but then I saw its name inside the list of
I may try Agar-Agar and Direct Carbon later since there's another
carbon printing method (a non-toxic variant by Halvor Bjoengaard) -
which I also want to try - that uses this material.
May I request another clue? Should one harden the underlying gelatine
layer? (My bet would be to not harden...)
Quoting John Grocott <email@example.com>:
In either process the paper is coated with a layer of gelatine but
which supports, only in the Direct Carbon process, a layer of
pigment dissolved in a mucilage, instead of being incorporated in
the same base gelatine as occurs in the Carbon Transfer process.
So, to recap.The paper forDirect Carbon is made of a thin layer
which is generally gelatine; on this layer is coated the pigment
dissolved in a vehicle such as Gum Arabic, Tragacanth Gum, Lichen,
Agar-Agar etc., but the base coating is always formed of a thin
layer of gelatine in direct contact with the paper support.
The result of this way of preparing the paper, for one thing, is
the various qualities that can be obtained according to the
proportions of gelatine and gum muclage used and also the thickness
of the pigmented surface layer and the extent to which it
penetrates into the base layer when development takes place.