[GreenKeys] History of printing machines

[Bruce Gentry]

I had many similar memories. I was in the audio-visual service at my 
high school. The room with several "Ditto" brand spirit duplicators was 
next door. Sometimes, we would be asked to help print out materials. 
With three people in the small room cranking away on the duplicators, 
the air got quite rich with fumes. I took two years of printing as well. 
We had an Adressograph-Multigraph 1250. A few years later my experience 
would be very useful. I was in Southeast Asia, in the Air force, and 
nearing the end of my term. I was given a master  of my orders out of 
there and told to go to the base print shop to get about a hundred 
copies made. As my luck always fell, there was no one there to make the 
copies and it would be about a week before there would be someone to 
make them. I asked for an explanation, and was shown the machine. It was 
a 1250. I was invited to print the copies if I knew how, and needless to 
say, had a stack of copies in a few minutes. It took a few more minutes 
to clean the blanket cylinder, raise the ink rollers, and put the water 
on standby. I departed to my next base on time.

     Bruce Gentry, KA2IVY

On 3/8/22 16:24, Jim Cooper wrote:
> Holy Moly !!   except for the links, it sounds
> like you were talking exactly about ME !!
>
> First with the ditto carbons ...  a sponge and rubbing alcohol
> for manual printing !!   eventually my own desktop ditto with
> a drum for the alcohol !
>
> In fact, I still HAVE the Model 80 and 1250s here ...
>
> For the Multiliths, I found a supply of PAPER masters
> that, if you typed on them with the right kind of ribbon,
> they would print maybe 100 to 150 copies ... really cheap!
>
> Jim  w2jc   (W2BVE way  back then)
>
> On 8 Mar 2022 at 11:59, Harold Hallikainen via GreenK
> wrote:
>
>> Looking at some of the processes:
>>
>> 1. I had a small mimeograph machine
>> that printed postcards. It was a
>> tabletop hand crank machine. I later
>> got a mimeograph machine that would do
>> letter size copies.
>>
>> 2. In elementary school, I got a
>> typewriter (
>> https://hallikainen.org/gallery3/inde
>> x.php/keh/keh1/adg ). At school, they
>> used ditto machines to print class
>> materials. The carbons were im the
>> trash cans. I'd collect the carbons
>> and make my own ditto master (type on
>> paper with the carbon on the back
>> putting backward inked type on the
>> back of the paper). I'd then make
>> copies by rolling the "master" with
>> another piece of paper through the
>> typewriter while brushing alcohol on
>> the platen roller. The alcohol would
>> soak through the copy paper and pick
>> up ink from the master. The ditto
>> carbons that I picked up out of the
>> trash cans had been used to make ditto
>> masters. As such, they had readable
>> text on them. One teacher thought I
>> was taking them to see test
>> questions ahead of the test.
>>
>> 3. In high school, I got a Multilith
>> model 80 offset press, then a model
>> 1250. A local print shop let me use
>> their copy camera to make negatives
>> of the stuff I wanted to print. I'd
>> tape the negatives into a masking
>> sheet to layout the page. The masking
>> sheet then went over a photosensitive
>> plate, a sheet of glass out of an
>> old TV was then put over the
>> combination. I then exposed the
>> plate to UV with a sunlamp. Developed
>> the plate and onto the press it went.
>> One of the projects run through this
>> process on the 1250 is at
>> https://miramonte1969.org/MUDS1969.pd
>> f .
>>
>> Harold
>> https://w6iwi.org
>>
>>
>> 4. At one time I tried gelatin printing with a tray of Jello. That
>> did not
>> work very well.
>>
>>
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