RE: bronzing in pt/pd AND Epson 2400 curves

Chris, A buret is like a large pipette but with a stop cock. It allows one
to measure large, 10, 25, 50ml at a time accurate to a drop or less
depending on the unit of measure. It does require a stand. When you are
doing large prints, it makes sense to use these to measure your coating
solution. If I was teaching at your level, I may be tempted to have one set
or two that the whole class uses. The down side is that the opportunity for
a brain cramp occurs, and that may waste larger amounts of solution. But
they can be quickly recovered from IF good notes were taken before each
student used it BY THE STUDENT. i.e. The buret has 35.5ml before I started.
I need X ml. Simple math will follow. It saves from having many bottles al
over the place too. If it would cause a back up at a station, that obviously
would be no good.

Just ideas, and one certainly needs to judge the ability of ones own
students mechanical abilities. I would not presume to speak to that for your
students.

Just as one sometimes needs to adjust ink jet prints, one may need to adjust
a print after a neg is made; slightly but needed. I don't doubt the ability
of the students or you to make a spot on negative based on the procedure, it
is just that the interpretation may change tomorrow, next week or next year,
but maybe only by a little. It may also be that the change happened in the
chemistry, lights or...
 
Eric

Eric Neilsen Photography
4101 Commerce Street
Suite 9
Dallas, TX 75226
http://e.neilsen.home.att.net
http://ericneilsenphotography.com
 
> -----Original Message-----
> From: Christina Z. Anderson [mailto:zphoto@montana.net]
> Sent: Sunday, April 09, 2006 2:17 PM
> To: alt-photo-process-l@usask.ca
> Subject: Re: bronzing in pt/pd AND Epson 2400 curves
>
> Eric,
>
> > Why would they need to change their curve? Keep the curve and allow for
> a
> > change at the print interpretation.
>
> Point well taken; I am testing this right now as we speak, on a 13x19
> print
> (gasp).
> >
> > When I learned printing a few years back, potassium chlorate was the
> way.
> > As
> > we made a transition to large prints, 20x24, 30x40 and I made use of
> > burets
> > to measure solutions.
>
> What's a buret??
> Chris
Received on Sun Apr 9 16:14:10 2006