Re: temperaprint & foaming

correction- I should have said : Dry and expose and then wash and then on to
the next coat. Sorry. Hellena----- Original Message -----
From: "Hellena Cleary" <hellena@hncleary.plus.com>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Tuesday, February 14, 2006 10:21 AM
Subject: Re: temperaprint & foaming

> I think all coating techniques are difficult in the beginning but as we
> master a medium we tend to forget this fact. I will always remember how
> terrible my first efforts were with a glass rod. If you are using the
> correct dilution there should not be too much of a problem. An
anti-foaming
> agent is not necessary. As Dennis noted you have too much solution on the
> paint pad or roller. I always roll off the excess onto a kitchen towel and
> use a nice lightly saturated roller and coat with a bit of pressure at
> first then gradually going lighter. Dry and expose and then on to the next
> coat. I wouldn't worry if your first coats are a bit streaky and uneven.
> Press on because this is a very forgiving process and the effects are
> created by the combination of colours resulting from the various coatings
> rather than a first perfect coat so an imperfection may well disappear
after
> a couple of coats. Keep going. It will be worth it and good luck. Hellena
> ----- Original Message -----
> From: "dklinker" <d.klinker@ntlworld.com>
> To: <alt-photo-process-l@sask.usask.ca>
> Sent: Monday, February 13, 2006 8:44 PM
> Subject: Re: temperaprint & foaming
>
>
> > Gord i think the problem is that you are overloading the roller with
> > emulsion and that on the final pass over the yupo with the roller the
hand
> > should just support the roller but not apply any pressure I am sure that
> > Some of our experienced Temperaprinters on this list could supply a
> > better.explaination Dennis Klinker
> > ----- Original Message -----
> > From: "Gordon J. Holtslander" <holtsg@duke.usask.ca>
> > To: <alt-photo-process-l@usask.ca>
> > Sent: Monday, February 13, 2006 6:15 PM
> > Subject: temperaprint & foaming
> >
> >
> > > Hi:
> > >
> > > I continue to fiddle with tempera printing - still not happy with
> coating.
> > >
> > > I've tried using a brush, roller, and paint pads - but still get a
very
> > > inconsistent coating.
> > >
> > > Get the most consistent coating using a roller, but application with a
> > > roller creates lots of tiny bubbles.
> > >
> > > Read that the addition of salt reduces foaming and bubbling. Added a
> > > pinch of salt to the last tempera mix. It appeared not to foam as
much.
> > >
> > > I wanted to see what a brush coating would do - no bubbling, and was
> able
> > > to put on a very thick coating. So thick that it would not bind to
the
> > > yupo, or the addition of salt prevented proper hardening.
> > >
> > > Didn't have time to do a roller coating though.
> > >
> > > Read more about antifoaming agents. Looks like Dimethylpolysiloxane
is
> a
> > > commonly used food grade antifoaming agent. Its seems to be a
suspension
> > > of very fine silicone particles that alter the surface tension so that
> > > foam bubbles can not form.
> > >
> > > Does anyone have experience with any antifoaming agents?
> > >
> > > Gord
> > >
> > > ---------------------------------------------------------
> > > Gordon J. Holtslander Dept. of Biology
> > > holtsg@duke.usask.ca 112 Science Place
> > > http://duke.usask.ca/~holtsg University of Saskatchewan
> > > Tel (306) 966-4433 Saskatoon, Saskatchewan
> > > Fax (306) 966-4461 Canada S7N 5E2
> > > ---------------------------------------------------------
> >
>
Received on Tue Feb 14 04:21:19 2006