Digital BW, The Print

I have been doing some experimenting on how much bronzing there is 
when using UT on glossy surfaces.  By chance I have photo which I 
ended up painting pure black on some of the areas to increase 
contrast and when printed on Permajet Glossy & Oyster and Fuji 
MultiJet these are the only areas which have any hint of bronzing.

Paul any ideas why.  To combat this I have repainted them 94% black 
because I know that it does not bronze/shine differently until above 
95% on the wedge graph I have.

Oh and by the way I do like these UT inks, my only criticism is that 
they are too warm.  Even the NC1 curve is 'brown' when placed next to 
a black only print.

I am using NCA in the driver so how do I adjust the tone on the print 
without using the sliders in the driver?

Gareth