Digital BW, The Print

Steve,

>... By blackless printing I mean using UT2/7 but without the K (either thru
>using your curves or QTR), using the ³colour position² inks only.

<<MIS 7600 & 2200 Light black is the main ingredient in the UT inks, 
And that is RC compatible.  Eboni is not used at all in the diluted 
or "color" position inks in the UTs.>>

>What I meant was that if to avoid/eliminate bronzing on RC paper one should
>avoid the use of Eboni and use just the shades of ³MIS 2200 Light Black²
>then it begs the question as to why MIS doesn¹t invent a K position 
>ink with LK attributes except of course that it is a dark black, ie 
>a darker LK.  (Given the LK and lighter inks have no issues with both matt
>and RC papers.)

But the MIS does bronze.  The MIS PK is, in effect, the LK at twice the
load.

>A while ago you had mentioned that the UT7 LK was a much more neutral LK
>than the Epson UC LK.

I'm not sure that is the case.  The Eboni is the one that is much more
neutral than the MIS version.  I have a test inkset made with UC inks and
that inkset's "warm-carbon" curve seems to be more neutral than the MIS
version.  (Perhaps it's my new base -- real complex: distilled water and
glycerol.)

>Is just this ink alone enough to drive significant
>dMax or is only when combined with the other colour position 
>inks in the UT7 set that one can get enough dMax without the use 
>of the K ink (Eboni)? 

No, the LK is too light.  The cyan and magenta dark inks are darker than the
LK.  Also, the 2 inks together produce a better dmax than either one by
itself.

Paul
www.PaulRoark.com 

For UT2 & UT7 information, curves, and settings see:
http://home1.gte.net/res09aij/