[GreenKeys] Fw: Re: TTY Ribbons

[Rokumon Cat]

--- On Wed, 8/10/11, Rokumon Cat <rokumoncat at yahoo.com> wrote:


From: Rokumon Cat <rokumoncat at yahoo.com>
Subject: Re: [GreenKeys] TTY Ribbons
To: "Bruce Gentry" <ka2ivy at verizon.net>
Date: Wednesday, August 10, 2011, 12:38 PM







The " spirit" of spirit duplicators is methanol. It is very toxic, and will in high enough blood levels cause blindness, liver death and just plain death.
 
Be careful with it, don't huff it and use sparingly. (It does have other legitimate uses as well.)
 
Joe

--- On Wed, 8/10/11, Bruce Gentry <ka2ivy at verizon.net> wrote:


From: Bruce Gentry <ka2ivy at verizon.net>
Subject: Re: [GreenKeys] TTY Ribbons
To: GreenKeys at mailman.qth.net
Date: Wednesday, August 10, 2011, 12:32 PM


Randy and Sherry Guttery wrote:
> On 8/10/2011 5:46 AM, Bruce Gentry wrote:
>> Does anyone remember the
>> Addressograph-Multigraph office offset machines? They were small
>> offset printing presses intended for single color small production
>> printing in schools, hotels, stores,  and factories.
> I kind of think you may be talking about a spirit duplicator - which 
> indeed most commonly produced a purple print.  The process used a 
> two-sheet "master" - which was either typed on or (if one pressed hard 
> enough) - could be hand-written. The "face" of the bottom sheet 
> contained a wax coating which contained an aniline purple dye. As the 
> "image" was impressed on the top sheet (by typing or other means) the 
> wax would transfer to the back forming a reverse image containing the 
> purple dye.  Once the master was completed - it was mounted face-down 
> (wax side out) on a drum of a duplicating machine (often miss-named 
> mimeograph - which was actually a different process). The drum was 
> rotated (either by hand or in some units - an electric motor) which 
> rotated the master past a wick to "wipe" the dye containing wax with 
> just enough alcohol to dissolve it a bit - and then to press against 
> another piece of paper transferring the image. We still have such a 
> duplicator we bought new for our church in 1972 - which they quit 
> using in the late 80s or early 90s - and we put into storage. The main 
> thing most people remember about spirit duplicators - like many of us 
> think about teletypes - is the smell... the type of alcohol they use 
> has a most distinctive smell that stayed with the "copies" for quite 
> some time...
>
No, I wasn't talking about a spirt duplicator. I'm very famailiar with 
those and the fragrence.  In the high school Audio-Visual service, we 
sometimes got drafted to crank out copies. There were 4 of the machines 
in a very cramped  room. With four people in there cranking away, the 
air certainly had spirit, and we weren't complaining either!  Another 
thing, the image is backward on a spirit master. For offset printing, 
the blanket roller reverses it, so the master is the same orientaion as 
the copy. 



  Bruce Gentry
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