Digital BW, The Print

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





_______________________________________________________
Send a cool gift with your E-Card
http://www.bluemountain.com/giftcenter/