Digital BW, The Print

OK, I'll buy Mark's numbers on inks costs.. Hell we've known that dirty 
little OEM secret for years...

OTOH:  He's nuts in calling film and traditional prints "digital"... 
Sure, the individual Silver Salt grains are exposed individually, BUT, 
and this is a big BUT, they lay over each other and in depth, not just 
in a uniform 2 dimensional pattern.  An emulsion is a 3 dimensional 
colloidal suspension of Ag grains in some type of gelatine or 
gelatine-like layer.. The random overlays and depth of the emulsion 
clearly create an analog value set, not a digital one..

His facts on "DuraBright" inks (he misspelled the name, not I) are 
completely wrong as well.. Along with the info on which OEM inks the 
1270 uses. As for his commentary on the resin encapsulated EPSON 
pigments, GEEZ!  Part of the problem with them on microporous papers or 
on the vast majority of RC type papers is that the epoxy resin capsule 
will NOT bond to the receiver and rolls off like a miniature ball 
bearing... In no way do those resin capsules break open on impact... 
What would be the point (unless the ink inside the capsule is a dye)? 
 Why encapsulate, cause potential metamerism, and other issues, only to 
have it disgorge raw pigment particles  onto the paper?  Just put the 
pigments in suspension instead...  If his model were true, you'd face 
the silliness of creating larger pigment particles, and creating higher 
clog potential just to place much smaller pigment particles on the 
receiver? It's sheer nonsense..

On behalf of Berkeley alumni everywhere, I want to apologize for Mark 
having a Physics degree and still getting the physical chemistry of inks 
so messed up..  ;-)  He may be a great artist. A chemical engineer or 
physical chemist he ain't.
Keith

 

"Just some guy," and caretaker of the Multiverse's largest EPSON printer 
User Community (highly recommended by Vogon Poets and MegaDodo 
Publications), at:

http://groups.yahoo.com/group/EPSON_Printers/
 
"For the rest of you out there, the secret is to bang the rocks together 
guys"

 

****************************************************************
CONFIDENTIALITY & COPYRIGHT NOTICE:
This e-mail message, including attachments and contents, is © Copyright, 
Keith Krebs, 2001-2002, All Rights Reserved. It is expressly for the 
sole use of the intended recipient and may contain confidential and 
privileged information. Absent the express written authorization of the 
author, any unauthorized review, use, disclosure, transfer, or 
distribution is explicitly prohibited and taken at your own risk. If you 
are not, or are unsure whether you are, the intended recipient, please 
contact the sender immediately and destroy all copies of the original 
message. Violations will be prosecuted to the FULL extent allowed under 
applicable civil and criminal law. Imagery published or distributed in 
violation of these conditions shall be subject to a $1500/image 
liquidated damages charge, in addition to any applicable Copyright 
violation penalties.

POV IMage Service Banner
****************************************************************
{ The P.O.V. Image Service Website is still at http://www.p-o-v-image.com/ }






[Non-text portions of this message have been removed]