QTR-Quadtone RIP

Hello,

I am trying QTR in order to get rid of metamerism on my prints with
Epson 2200 on Ilford SP paper.

I does great at that. However, contrast and luminosity of my prints
are wrong, and there is awful bronzing.

Does anybody know where I can find curves for Ilford SP and Epson UCpk
ink so I can try and see if I am able to get something acceptable? I
was unable to find anything.

Thanks!