Re: aguatint screens and photogravure screens

[lva <lva@pamho.net>]

> At 01:19 PM 8/12/01 +0200, you wrote:
> > > I work with photolithography on a daily basis
> > > so you should check the details on that gravure screen to find out
> > > exactly what it is.
> >
> >Gary, could you explain in a few sentences what photolithography is?
> >I have seen a print recently and wondered ever since.
>
> Photolithography is the most common process printers use in their
> printing methods. The name litho  comes from the fact the process was
> first done with a smooth stone as the image bearing surface (probably
> a limestone). A greasy image was drawn onto it then the stone was
> dampened and a greasy ink applied. The damp stone repelled the ink and
> the grease image attracted it. Then a clean sheet of paper was pressed
> onto the surface that picked up the ink resulting in a reverse of the
> stones image. If done right its pretty high quality.

Thanks Gary. Is there a process by which one can print a continuous tone
(no half-tone) photo from such a lithographic stone?

Brahma