Digital BW, The Print

Jo,

Thank you for the info on the Lyson inks. I have been waiting for 
someone to post something about the Lyson.

Aside from the archival and fade issues, how would you compare the 
quality of the images prior to your test?

I ask because there might be commercial applications where long life 
and fade resistance are not so important. The initial Dmax of the 
Lyson print was on a level with silver prints.

Martin



--- In DigitalBlackandWhiteThePrint@y..., Jo Brunenberg <jobnl@e...> 
wrote:
> 
> Piezo versus Lyson Small gamut
> 
> .............and the winner is: Piezo B&W!
> 
> I carried out a small, nonscientific, experiment:
> 
> During the complete month of August (very sunny in the Netherlands 
where I
> live) I exposed two black-and-white prints to the sunlight in my 
roof-window
> on the south. So a rather tough test.
> 
> The results are remarkable!
> 
> About the prints:
> - One print was the Piezo BW sample (stairs) which I received from
> Inkjetmall (paper: Somerset Enhanced)
> The other was a Lyson small gamut BW print (with very rich deep 
solid
> blacks) that was made for me by Lyson (paper: Lyson Standard Fine 
Art)
> 
> Half of both prints were covered by heavyweight black paper.
> The other halfs were exposed to the sun.
> The result was judged visually and by using a densitometer.
> 
> The results after one month sun exposure:
> 
> - The exposed part of the PiezoBW print did not change in the dark 
grey and
> black areas. There is a very slight fading in the highlights. The 
exposed
> part is slightly less "greenish". The print still is very 
acceptable.
> (the slight fading is just visible to the eye and a densitometer 
does read a
> minor change).
> 
> - The exposed part of the Lyson print shows a dramatic fading as 
well as a
> colorshift. On the unexposed part the greys are slighly "greenish", 
like the
> Piezo BW. After exposure the greys have a strong sepia-magenta cast.
> The fading iof the Lyson print is visible in all tones from 
hihglights up to
> the shadows but is most visible in highlights and midtones. The 
print became
> completely useless.
> 
> The densitometer tells me:
> 
> PiezoBW
> highlight		
> before exposure: D 0.20
> after exposure: D 0.18
> 
> midtone:
> before exposure: D 0.60
> after exposure: D 0.59
> 
> shadow:
> before exposure: D 1.84
> after exposure: D 1.84
> 
> Lyson small gamut
> highlight		
> before exposure: D 0.20
> after exposure: D 0.02
> 
> midtone:
> before exposure: D 0.60
> after exposure: D 0.30
> 
> shadow:
> before exposure: D 2.26
> after exposure: D 2.00
> 
> 	
> Best regards,
> 
> Jo Brunenberg
> http://www.jobrunenberg.com
> 
> 
> 
> 
> 
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