Todd,

Instructions from Kodak's website:

"Use with warm-tone papers to produce several cold brown hues
Use to extend print life without changing the image tone on black-and-white paper
Used for archival processing
Dilute 1:20 for print protection
Dilute 1:20 or 1:40 to increase shadow contrast and maximum density with a minimum tone change"
http://www.kodak.com/global/en/profe...bwToners.jhtml
http://www.kodak.com/global/en/profe...bs/g23/g23.pdf

I'd suggest 1:10 dilution for colour change. Don't rely on Kodak's line about protection without tone change - that has been disproved now.

Cheers,
kevs