Well, in that case we can be pretty sure I don't have Harman gloss! Thanks for the description, Bez. I'll try it next time I need matte prints done, and I'll update here. Not that this has turned into a thread of general interest/ use - more a tale of one man's poor organisational skills.
4+mls just to switch paper/ black is such a waste - I guess that will be the first thing to change on this printer when it's updated to keep up with the R3000 (if I have my facts right)?
Thanks for you patience, everyone.
ps Innova have replied to my request, and are sending sample packs, free of cost. They're the only company I can find doing this now and, for sure, if they are as good as reports on photo-i, I'll be using them as my stock paper on the 3880.