Carbon black and gum correction

 
In a message dated 03/12/2005 09:41:36 GMT Standard Time, Grafist@aol.com
writes:

Hi Dave and Marek and All, Carbon Black can be animal, vegetable or
mineral based (metal oxide). The popular names for these are Bone or Ivory
(animal), Vine (VEGATABLE) or Mars(mineral or metal oxide).. Then
there is Lamp Black and Furnace Black which I think are very similar in their
origin and its made by collecting the deposited residue from a flame burning
a material. I find these different ''carbons'' seem to have particles of
varying sizes. You can spend hours trying to mix Lamp black with pure
water........the powder just floats on the surface. Furnace Black, however, mixes
readily, but adding a little ethyl alcohol to the Lamp black will make it
missible. I dont think that gum takes too kindly to being added to alcohol,
though......it just hardens up and ends up like chewing gum. Happily, I am not a
gum printer so do not use gum, altho I do use carbon to make prints.
                       Carbon is not all that simple to work with.
                              John Grocott - photographist
                               SKYPE Number. carbons999
Received on Sat Dec 3 06:52:47 2005