Hi David; You've spent more time in the darkroom than I! So I know you know, tools and technique are just that. I would never suggest a work flow change based on Manufactures claims either. Tests conducted under one's own conditions, are still the only way to separate the smoke from the mirror! As I'm sure you're aware an icc file is not always the recipe for a great print either.... Thankfully the artist's eye and knowledge of what makes a great print is still useful. On the whole; I'm just happy manufacturer keep creating better tools. The Hyperbole isn't confined only to Manufacturers these days.... Let's not get started on that! cheers chris chris thomas PHOTOGRAPHER http://www.facebook.com/ChrisThomas.Vancouver chris@christhomas.com 604 . 649 . 5352 - In Vancouver 1.800.870.5110 - In North America From: Millers' Photography L.L.C. [mailto:digitalimaging@dnmillerphoto.com] Sent: Saturday, October 06, 2012 10:10 PM To: Chris Thomas Cc: colorsync-users@lists.apple.com Subject: Re: An academic question: "Dry Down Time" for UltraChrome HDR inks Thanks Chris. Today, I did read about clogging heads in specifically, earlier 9900's. I had an 9600 since Nov of 2002. Did have an occasional clog. And the 9600 dedicated to matte black ink served my and my clients very well...... This 9900 was built, or assembled June 28, 2012, a Thursday. So, I do hope issues have settled down, and improvements have been made. I am so used to 24 hour to 48 hour 'dry down time', I'm not bothered by it. My question is, how can any of these manufacturers claim what they claim? I don't know. And, the darkroom? I started my darkroom experience in 1948. Cheers D David B. Miller, member, Millers' Photography L.L.C. 3809 Alabama Street Bellingham, WA 98226-4585 360 739 2826 snip