Richard Sullivan (richsul@earthlink.net)
Wed, 12 May 1999 09:31:17 -0600
Joseph,
It was just a flippant comment though it seems that it might work. In a
word, no I haven't done it with a phono turntable though it seems like it
is about the right speed. I'd put it down in an enclosure. I'd make sure
the top of the turntable was flat and level. I'd fix the Mylar to something
flat like a piece of glass.
(Years ago I noticed that the bonding material (3M Pliobond) for putting
down Formica worked great as a temporary sticky stuff. If you coat two
pieces with the stuff and stick them together they are impossible to pull
apart. If you coat only one piece and stick something to it, you can peel
it off later with no trouble. The stickiness lasts for several weeks maybe
even months. I made a neat bleed edge photo easel using it. I took a piece
of plywood and glued down a couple of strips of wood to make a corner. I
then coated the board with 3M Pliobond. You could then stick your enlarging
paper down nice and flat and then peel it up quite nicely. I would try
coating the glass with Pliobond and sticking the Mylar down on it. After
coating and drying you should be able to peel the Mylar off with no sticky
stuff sticking to the back.)
I'd wear gloves and hold the plate with the Mylar stuck on it in one hand
and pour the the coating while tipping and rolling the plate to get it all
over evenly. Then I put it on the turntable set at the proper speed.
(What's that? That's to figure out.)
--Dick
At 11:01 PM 5/11/99 -0400, you wrote:
>Dear Richard:
>
>You mentioned spin coating. Are you aware of anyone who has jerry-rigged a
>spin coating contraption with a gramophone turntable? If so, how is it
>done -- in particular, how is the liquid emulsion applied to the spinning
>substrate.
>
>I'd be curious to hear about such a set-up.
>
>Regards
>Joseph Arkins
>New York, New York
>-----Original Message-----
>From: Richard Sullivan <richsul@earthlink.net>
>To: alt-photo-process-l@sask.usask.ca <alt-photo-process-l@sask.usask.ca>
>Date: Tuesday, May 11, 1999 5:08 PM
>Subject: Re: Anyone ever tried this?
>
>
> >Sam,
> >
> >That system sounds neat.
> >
> >I haven't had time to try out this theory of the PVA dichromate dye system
> >so I thought maybe someone here on the list might want a project. I suspect
> >that it has already been done but who knows, maybe not.
> >
> >My theory says:
> >PVA is known to absorb dyes. If a layer of PVA was put on Mylar and was
> >then dichromated dried and exposed, the exposed areas would harden and be
> >less absorptive. When exposed piece was soaked in a dye, the hardened areas
> >would absorb less dye thus producing an image. I suspect doing it on paper
> >would be difficult if not impossible since the paper would absorb the dye
> >as well so a Mylar base instead of paper would be in order.
> >
> >Downside: dyes are not as permanent as pigments though the blacks and
> >browns are fairly permanent.
> >
> >Upside: As permanent as dye transfer, brilliant colors and no "hard top
> >soft bottom" problem of colloid pigment processes.
> >
> >Upside II: We can recycle old phono turntables by turning them into spin
> >coaters.
> >
> >--Dick Sullivan
> >
> >
> >
> >At 12:09 PM 5/11/99 -0400, you wrote:
> >>Dick,
> >>
> >>Not exactly, but I have used Elmer's School Glue with dichromate and
> >>pigment. Development is encouraged by the use of alcohol. I was under the
> >>impression that the result is a polyvinyl alcohol print. The one I made on
> >>a T-shirt underwent numerous washing till the shirt fell apart, and yes,
> >>the image was intack.
> >>
> >>Sam
> >>
> >> >I was recently reading the new bio of Edwin Land. Besides learning that
>the
> >> >family name was Salomonovitch and it was thought that his father mistook
> >> >the immigration officials saying "You are now landed" as the source of
>the
> >> >family name there was a couple of other tidbits that look like areas for
> >> >exploration. Perhaps someone has already exploited this function. 3M
>Color
> >> >key perhaps???
> >> >
> >> >1. Polyvinyl alcohol absorbs dye. The early base for Land's polarizing
>film.
> >> >2. Polyvinyl alcohol hardens in light like gum if dichromated.
> >> >
> >> >Coat PVA on plastic sheets. Dichromate. Expose and then dye the sheet.
> >> >
> >> >Just thought I'd pass it on.
> >> >
> >> >Hmmm. It could have been the Polaroid Salomonovitch Camera.
> >> >
> >> >--Dick Sullivan
> >> >
> >> >
> >> >
> >> >
> >> >
> >> >
> >> >505-474-0890 FAX 505-474-2857
> >> ><http://www.bostick-sullivan.com>http://www.bostick-sullivan.com
> >> >http://www.workingpictures.com
> >
> >
> >
> >505-474-0890 FAX 505-474-2857
> ><http://www.bostick-sullivan.com>http://www.bostick-sullivan.com
> >http://www.workingpictures.com
> >
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