Carl Weese (cjweese@wtco.net)
Thu, 11 Mar 1999 09:05:37 -0500
Cor,
Lithium ferric is used in place of some ammonium ferric oxalate (up to
about half) in the Zia formula. The warm color is very different from
either cesium-palladium or the sodium tungstate. Color also depends a
lot on what paper you use, with, for example, Arches Platine taking on
much more color than Cranes platinotype.
If you have TNPP, formula and mixing instructions for lithium ferric
oxalate are in the appendix. If you don't have it I can dig that info
out of my hard drive for you.
---Carl
This archive was generated by hypermail 2.0b3 on Sat Nov 06 1999 - 10:09:02