[LargeFormat] Re: Ultrabiglargeformatcamera

Tue Mar 11 08:56:03 2003

Les:

The company from which I bought my light table a few months ago had just
converted to a system which directly outputs plates from the computer...
Quark/Pagemaker/InDesign to plate.  No arc lights, no process camera, no
film.
-- 

Jim - http://www.hemenway.com


Les Newcomer wrote:
> 
> Admittedly this is slightly off list, but  how does an offset printer go
> 'desktop'
> 
> When I was looking into the career, and even when my wife managed a prints
> shop 6 years ago, you still had to burn a plate.  Do they have laser
> printers now with arc lights?
> 
> Les
> 
> On Tuesday, March 11, 2003, at 02:22 AM, click76112@charter.net wrote:
> 
> > <<All done with computers and laser
> > printers now.>>
> > Richard et all,
> > This was my business for over 25 years.  This is not entirely true.  There
> > are loads of offset printers that have still not converted to desktop
> > yet.
> > They will because the materials are drying up and the cameras are gettting
> > rarer and the parts are getting harder to get. I about 6 installs to do in
> > the next month to convert these guys into the digital age.
> >
> > lee\c
> > ----- Original Message -----
> > From: "Richard Knoppow" <dickburk@ix.netcom.com>
> > To: <largeformat@f32.net>
> > Sent: Thursday, March 06, 2003 3:18 AM
> > Subject: Re: [LargeFormat] Ultrabiglargeformatcamera
> >
> >
> >>
> >> ----- Original Message -----
> >> From: "Jim Brick" <jbrick@elesys.net>
> >> To: <largeformat@f32.net>
> >> Sent: Wednesday, March 05, 2003 3:13 PM
> >> Subject: Re: [LargeFormat] Ultrabiglargeformatcamera
> >>
> >>
> >>> The camera is a process camera, used by the semiconductor
> >> and printing
> >>> industries for decades. I ran one of these in the early
> >> 60's. As process
> >>> cameras go, this one is not particularly large. Those used
> >> for making
> >>> semiconductor masks make this one look like a toy.
> >>>
> >>> Process cameras for the printing industry used arc lamps
> >> (later pulsed
> >>> xenon lamps) and were used to make line and halftone
> >> negatives.
> >>>
> >>> Process cameras for the semiconductor industry used a very
> >> sharp cutoff
> >>> green light and lenses that were made to be exceedingly
> >> sharp only at that
> >>> one wavelength. These cameras were made to be able to
> >> reduce man made
> >>> semiconductor layer tape-ups (very large) down to
> >> microscopic size for
> >>> masks from which to manufacture integrated circuits.
> >>>
> >>> The big process cameras were focused by the numbers. Not a
> >> loupe and ground
> >>> glass. A crank on the back to dial-in the number for the
> >> percentage reduction.
> >>>
> >>> Jim
> >>>
> >>>
> >>   Note the sprint shock mounts on the bed!
> >>   The whole theory and practice of making half-tone plates
> >> is fascinating. Its now almost a lost art, particularly the
> >> original method using cross-screens made of ruled glass.
> >>   The half-tone process was capable of very good quality
> >> when done right but it more often was not. The average
> >> quality of half-tone work done now is enormously better.
> >>   Until the 1950's the medium of choice was wet plate
> >> colloidion but it was rapidly displaced by self-screening
> >> film which eliminated the need for the cross-screen and
> >> special apertures. All done with computers and laser
> >> printers now.
> >>
> >> ---
> >> Richard Knoppow
> >> Los Angeles, CA, USA
> >> dickburk@ix.netcom.com
> >>
> >>
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> >
> >
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