> > lf you go to http://www.ilford.com you will find in one of the pages the > technical information on the paper that you are looking for. The actual > page is > http://www.ilford.com/html/us_english/prod_html/multirc/multi_iv_rc.html#Te > chnical%20Data > which is a bit of a type-full. It is easier to click 'products' when you get > to the homepage. > > There is no mention of 'deluxe' so I assume that 'portfolio' is the same, > the backing may change but not the emulsion in all probability. > > Anyway, the iso is 500 if you are not using any filters to alter the > contrast range of the paper. > > Good luck > > Alexis
That's a paper ISO speed and not a film ISO speed. Probably a factor of a 100 or so different.