My understanding is that Z3100 uses Vivera inks (HP 70)...while the HP Premium Plus Photo Satin is best recommended for HP 85 and 58 (See back of the packaging if you still have it).
I found this out by accident - i used it on my B9180 and was wondering why the prints werent that good...it looks ok...but only for proof prints...I wouldnt use them for final...
In case you are still wondering, i got it in one of the going out of business compusa store for 60% off...