Digital BW, The Print

--- In DigitalBlackandWhiteThePrint@y..., "Martin Wesley" <mwesley250@e...>=
 wrote:
> Tyler,
> 
> I know you have seen a lot more of this stuff than I have, but the 
> small collection of Piezo and MIS VM prints I have show the reverse.
> 
> There is a green tone in most of the Piezo prints (paper independent) 
> that is especially noticeable under tungsten and halogen lights but 
> shifts to neutral in daylight. An unpleasant metamerism. The MIS VM 
> shows no green tone and behaves normally in moving between different 
> light sources. Warmer under artificial and cooler in daylight.
> 
> Am I just seeing some ink batch variations?
> 
> Martin Wesley

I have no idea Martin, but I certainly believe you. Could it be because I a=
lways let my Piezo ink prints "cure" to their real 
color before evaluating? They are certainly redder than when they first eme=
rge from the printer. And both inksets change 
to their final(?) color quicker when left out in the light (not direct sun)=
.
I would never say MIS prints are green, I'm only saying when both inks are =
held next to each other on the same 
Hahnemühle  family of papers, the MIS appear greener (I have a witness :). =
You could just as easily say the Piezo looks 
more red/magenta. I keep hearing about green Piezo prints and am not sure w=
hy, my very first Piezo prints were a touch 
green and I'm quite sure the Epson inks had not fully flushed through the 3=
000 tubes. The smallest amount of an inkjet dye 
can change a neutral tone quickly. After a few days it disappeared.
Could be batches, but both companies claim very tight manufacturing toleran=
ces. I don't get it, could very well be the 
curing issue.
Tyler