Paul, this is good news. But to clarify, are you saying that it can be used in your Eboni Carbon Variable Tone formulation for matte paper? http://www.paulroark.com/BW-Info/3880-Eboni-Variable-Tone.pdfI've been mixing this up using your C6-B base, but it sounds like the MIS product uses their Amber base?Robwww.robdeloephotography.com