[LargeFormat] Ultrabiglargeformatcamera

[Les Newcomer]

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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