Re: ATM Ronchi Rulings: Where to Buy?

["Richard Schwartz" <richas@earthlink.net>]

Use a regular 35 mm camera with high contrast film.   I believe that film is
very slow, like ASA 12 or so-- the package insert will instruct you.  You
have to mix up a special developer for it, so buy  the chemicals when you
buy the film.  Regular stop bath and fixer is OK for this.   Also, you might
want to mount the resulting grating in a slide holder to help keep it flat.

It is a fact that you cannot BUY a ronchi grating if you are a member of the
ATM list and make your needs known.

. . . Richard

----- Original Message -----
From: "Joseph Goins" <jb_goins@yahoo.com>
To: "Dominic-Luc Webb molmed" <Dominic.Luc-Webb@molmed.ki.se>; "Michael
Spooner" <spooner@page.az.net>
Cc: "Dominic-Luc Webb molmed" <Dominic.Luc-Webb@molmed.ki.se>;
<atm@shore.net>
Sent: Friday, December 07, 2001 7:54 AM
Subject: Re: ATM Ronchi Rulings: Where to Buy?


>
> Dominic,
>   How do you make a Slide film ronchi screen, if you
> don't mind me asking?  Can I use just a regular 35mm
> camera with kodak 25 asa film?
>
> Joe Goins
> --- Dominic-Luc Webb molmed
> <Dominic.Luc-Webb@molmed.ki.se> wrote:
> >
> > On Thu, 6 Dec 2001, Michael Spooner wrote:
> >
> >    > Haven't tried these. What I had experience with
> > are the ones from years ago
> >    > >    >
> >    > >    > The glass Edmund rulings are good. I
> > much prefer them to film
> >    > varieties.
> >    > >
> >    > > Have you used B&W HC slide film and actually
> > found these
> >    > > to be inferior? These are far different than
> > other
> >    > > films I have tried.
> >
> >
> > Ok, that's probably why, Michael. Normal slide film
> > is much
> > worse than overhead transparency. However, HC B&W
> > slide film
> > tends to give very black lines with very sharp
> > boundary
> > and the spaces between are very clear. I guess this
> > should be so (HC = high contrast).
> >
> > Since you are a skeptic, or at least you were until
> > now,
> > how about I send you a sample and you tell us if
> > this
> > film is any better?
> >
> >
> > Cheers,
> >
> >
> >
> > Dominic
> >
> > North 59 37' 30"
> > East  17 48' 10"
> >
> >
>
>
> =====
> Joseph Goins
> 1091 Harness Cir #1
> San Ramon, CA
> (925) 277-1351
>
> http://www.geocities.com/jb_goins/
>
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