UltraStable is four color carbon materials.
EverColor is a custom four color carbon (among other processes) lab.
Separations tailored for each individual process (including UltraStable) are
available from EverColor which are routinely 400 line or stochasticly
screened. EverColor also provides high resolution scans from your original
(pos or neg) plus a calibrated iris proof of approximately what to expect.
Additional info on UltraStable is available from Charles Berger near San
Francisco, California.
Additional info and samples are available free of charge from EverColor by
sending mailing address to Evercolor@aol.com.