[LargeFormat] Re: Ultrabiglargeformatcamera

[Les Newcomer]

A mazing!  Guess I'm a little late on taking that correspondence course on 
Linotype repair, huh.
On Tuesday, March 11, 2003, at 05:51 AM, Jim Hemenway wrote:

> 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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