I'm not so sure this is the case. Most of us who have experimented with lots of different types of papers have settled on those with no OBAs or those having minimal amounts. There is a lot of data on print permanence between different papers and you can clearly see the paper white change with papers having large amounts of OBA which leads to premature yellowing. The only papers I use that have any OBA content are Ilford Gold Fiber Silk (I have not tested the new version from the company following it's reemergence after bankruptcy and that paper may be somewhat different) and Hahnemuhle Photo Rag Ultrasmooth. I did not do anything other than the normal Argyll profiling since one really doesn't have much control if any over where and how prints will be displayed. I've got a bunch of prints hanging in various office building under wildly different lighting conditions and any attempt to correct for this through profiling would be a fool's errand on my part. Just my opinion. Alan -----Original Message----- In general, based on the various discussions on LL, it seems that a lot of people claim to understand OBC, but a bit of digging shows that really they do not, and most people don't bother with it because they have no way of seeing the benefits (assuming that there really are benefits). Robert