From: JUAN MIGUEL JUSDADO (jusdado@teleline.es)
Date: 08/12/03-11:35:16 AM Z
Larry that curve is almost the same as my curve for Salted Paper, is very
little difference. I use an old Epson 600 and material "INK JET FILM
TRANSPARENT STAEDTLER" with very good results.
-----Mensaje original-----
De: Larry Roohr [mailto:larry.roohr@comcast.net]
Enviado el: martes, 12 de agosto de 2003 17:09
Para: alt-photo-process-l@sask.usask.ca
Asunto: Re: Epson C82 Printer and Digital Negatives
Juan,
This curve is derived from densitometer readings directly off of the
pictorico negative, it linearizes the step ramp from min to max density for
a photoshop step wedge printed on the pictorico. So this curve is
independent of the printing method. All it gives is even density increase
steps measured wth a visible light densitometer.
Larry
JUAN MIGUEL JUSDADO wrote:
Larry, is the curve for cyanotipe or Vandike?
-----Mensaje original-----
De: Larry Roohr [mailto:larry.roohr@comcast.net]
Enviado el: martes, 12 de agosto de 2003 15:08
Para: alt photo
Asunto: Re: Epson C82 Printer and Digital Negatives
In the C80 if you select a glossy media in the printer driver the black ink
is not used, it's just CMY. While this will limit the density's you can get
on pictorico, it also makes for a very well behaved curve at the dense end
and works beautifully. Here is a curve I worked out for the C80 with glossy
media, 2.2 gamma, and color controls set on photo-realistic, in the Epson
driver. This curve is applied after you invert, just before printing:
0 5
5 17.25
10 28
20 42.6
30 55.5
40 65.86
50 73.53
60 80.28
70 84.34
90 91.89
95 93.45
100 95
It's easiest to input this as a transfer function, save it, then load it
into curves. Be sure to reset your transfer function after saving the curve
as I think it gets saved and applied when you print if your not careful.
Larry
----- Original Message -----
From: "Alan Mynett" <a.mynett@ntlworld.com>
To: "STUART GOLDSTEIN" <alt-photo-process-l@sask.usask.ca>
Sent: Tuesday, August 12, 2003 4:46 AM
Subject: Re: Epson C82 Printer and Digital Negatives
Hello STUART,
I have really only just started making digital negatives, so this
feedback may be premature. I have a C80, though I use Jet-Tec Inks in
it (because they're cheaper). Pictorico has only recently become
available in the UK from Nova. First trials suggest that I can get a
max density of around 2.0 (using my Epson 2450 and Vuescan software as
a densitometer - details at www.mynett.org.uk/ep2450/2450densi.htm .
This is certainly enough for cyanotypes. I'm still working on the optimum
curve to apply.
-- Best wishes Alan http://www.mynett.org.uk
This archive was generated by hypermail 2.1.5 : 09/05/03-09:30:46 AM Z CST