RE: Gum Calibration 3 (Dark Tricolor)

[Loris Medici <mail@loris.medici.name>]

Hi Marek,

How is this to your eyes? Christina & others?

http://www.loris.medici.name/gum/calibration/m_100step_1.jpg

This is the scan of non curved 100-step tablet at standard printing
exposure. (HP9180, all inks grayscale, plain paper profile, best quality,
non oiled 18lb inkjet bond, 15ml PV19 into 360ml gum, 1+1 gum+dichromate,
10% ammonium dichromate, 8:00, UVBL array...)

There's some unevenness (especially at top to middle left), but manageable...

BTW, I definitely see the need of a curve (or any other mapping method)
here; because of poor shadow separation...

Regards,
Loris.


27 Ekim 2008, Pazartesi, 5:39 pm tarihinde, Marek Matusz yazmış:
> ...
> It seems to me that diluting your stock pigment solutions with additional
> gum will lead you to weakly pigmented layers.
> ...