Here is a draft formula for an FS-Sepia, cyan position (posted 2/22/02).
Once you mix the cyan position ink, you can dilute it to make the FS-Magenta
and FS-Yellow for the Piezo driver (see below).  Or, if the sepia tone is too
warm, mix the FS-Sepia-cyan with the standard FS-cyan to get the tone you
want, and then do the dilutions below.

Black Position = VM or FS (or Piezo?) Black

FS-Sepia-Cyan Position ink =
20% VM/FS/(Piezo?)-Black,
26% MIS Archival magenta (color pigment ESCARC-2-M),
54% MIS FS-yellow (the new yellow pigment ESCARCE-2-Y).

FS-Sepia-Magenta Position ink =
26% FS-Sepia-Cyan Position ink
74% MIS clear base.
(posted 2/5/02)

FS-Sepia-Yellow Position ink
Method 1 = 
11% FS-Sepia-Cyan Position ink
89% clear base

Or

FS-Sepia-Yellow Position ink
Method 2 =
43% FS-Sepia-Magenta Position ink
57% clear base.

Paul
http://www.PaulRoark.com