This is an old thread, but I've got the same question. I print mainly using the SE inks, although I have neutral shades 2,3,4,5 at hand as well. Like Jeff, I find the SE inks to be pretty warm on gloss, such as IGFS. I'm increasingly starting to use Canson Rag Photographique, which is also a warmer paper and the SE effect is more prominent than on say HPR or EEM, where it is just about right in my view, but of course the SE effect on any of my matte papers is still a lot more subtle than on gloss.
So with the inks I already have, I'm wondering what the options are for producing a mix that tones down but doesn't lose the SE effect. I'm hoping for a mix that I can use on both IGFS and CRP, which would bring CRP back to roughly the same as SE on HPR, and would also tone down IGFS a little.
My natural thinking was to try a 50/50 mix of SE and neutral. I could do this for all four SE shades, although most of the warmth is coming from shades 2 & 3, so perhaps it's enough to mix those two. Since shade 4 is a 50/50 mix of carbon and selenium it's not clear whether or not I need to mix it as well. As shade 5 is selenium, I would have doubted that I need to mix it, although as it's the ink that seems to get used up fastest clearly it's having some impact on print toning, so I'm not sure about it either.
I have enough ink at hand to try this, but getting inks to the other side of the planet ain't cheap, and so I don't want to burn through too much in the process. I.e. If I can hit in a mix in one iteration that would be ideal, since I don't regard this kind of mix to be an exact science. In the ball park would be enough for my purposes.
Any one tried this? What is your view Jon?