From: Ricardo Wildberger Lisboa (wildberger@svn.com.br)
Date: 09/24/01-10:25:07 PM Z
Dear Friends,
Which are the best books you know on unsharp mask ? Or even magazine or web
articles ?
Thank you,
Ricardo.
----- Original Message -----
From: C Downs <fardog@mindspring.com>
To: alt-photo-process <alt-photo-process-l@usask.ca>
Sent: Monday, September 24, 2001 8:04 PM
Subject: Un SP mask . no diffuser necessary
> Just a personal note on unsharp masking. I'm new to this list so my
> apologies if this has been discussed previously.
> Over the years I've tried all sorts of diffusion sheets and ways of
> making the masks slightly out of focus. For the last 15 years I have used
NO
> diffuser. No problems so far and great dust free benefits. I use a sheet
of
> white acrylic over the neg and masking film with the film emulsions in
> opposite directions. This white acrylic being in contact with the original
> neg's emulsion will prevent N. Rings and in my experience gives all the
> diffusion necessary. Wess plastics makes a masking frame for 4x5 or
smaller
> negs that uses the same thing and I find it great for the smaller formats.
> This will prevent all manner of dust problems and if you keep your pin reg
> precise it will not be necessary to use the softer edges you get with
> diffusion sheets with their inherent problems. I still get the visually
> sharper edges and ability to lower contrast { or raise it....what ever you
> need ....also this is better for intermediate contrast masks to compress
the
> midtones or expand them as is sometimes done in color tranny printing on
> Ciba since two generations need to be made } .
> The acrylic can be easily drilled for whatever type of pin system you
> prefer. I like very large prints and this method will easily allow 40
inch
> prints from 4x5 and as large of prints as the roll paper will allow with
> 8x10.
>
>
This archive was generated by hypermail 2b30 : 10/01/01-01:41:32 PM Z CST