Re: Harmon's Ternary Method

Clay,
The triangle is such a clever idea. I am going to print one myself. Now,
following with your article what would the settings be for a 1.2 DR of the
negative?
Marek, Houston

>From: Michael Koch-Schulte <mkochsch@shaw.ca>
>Reply-To: alt-photo-process-l@sask.usask.ca
>To: alt-photo-process-l@sask.usask.ca
>Subject: Re: Harmon's Ternary Method
>Date: Tue, 13 Sep 2005 10:14:47 -0500
>
>Just to clarify. I only need to do the ternary graph procedure once for
>each
>printer I want to calibrate. Then once I've got the colour ratio for the
>printer I create a posterized step strip to determine what target density
>range I'm after. Do I need to create my own curve (one for each printer) or
>can I use the one you have included on the web page on any printer. How did
>you arrive at that curve? Would the curve not also differ between printers?
>Also, you mentioned you used a densitometer but that you also used a
>printed
>copy. Was this to determine the curve or the density range?
>
>~m
>
>Clay wrote:
> > Right! Whoever came up with this ternary graph was pretty ingenious.
> > The most common use in geology is plotting the ionic concentration of
> > the salts in feldspars. The three corners are potassium, sodium and
> > calcium. A feldspar can have any combination of these, but they all
> > add up to 100%
> > On Sep 13, 2005, at 8:33 AM, Michael Koch-Schulte wrote:
> >
> >> OK Wait! I get it. The wedge is actually five steps in each colour
> >> plane.
> >>
> >> ~m
> >>
> >> Clay wrote:
> >>
> >>>> Just to clarify that should read B:1 should it not?
> >>>>
> >>>>
> >>> Yes, sorry about the typo.
>
>
Received on Tue Sep 13 11:22:33 2005