Re: Accuset setup
- --- In PPLetterpress@yahoogroups.com, Mª Dolores Jiménez Mondragón <doloresj3@...> wrote:
>Film in an imagesetter is always exposed to the emulsion. And the terminolgy used is either RR-E up or RR-E down (thinking of "wrong-reading" is just confusing the issues). The change in orientation is done in the software, not in the cassette. You should understand that most negative imageseting has been for offset lithographic printing in which the plate does not contact the stock directly; it transfers to a blanket first, so there is a reversal of the image, then another reversal as it transfers to the stock. Letterpress is a direct printing process; the plate is in direct contact with the stock. Now think of the stock and the film as having the same emulsion orientation, right-reading, up. The plate reads backwards but the film and stock read forwards.
> Thank you Gerald, I know it, but I don't know if the imagesetter, with the
> RIP setup for right reading (image is filmed as it is sended to the RIP),
> is going to film RREU... I think that it depends on the way film is loaded,
> may be?,
--Eric Holub, SF
- As stated, the film will only load properly one way. If you try to load it backwards it I'll not unwind through the imagesetter properly. The exposure from the laser is made on the emulsion side of the film. Your RIP will require the imagesetter to be set a certain way from its console to work properly. The Avantra 30 I used had to be set to RREU and positive exposure for the setting from the RIP (Rampage) to produce RRED negatives for offset.
From: Mª Dolores Jiménez Mondragón <doloresj3@...>;
Subject: Re: [PPLetterpress] Re: Accuset setup
Sent: Mon, Apr 16, 2012 12:05:12 PM
Thank you Gerald, I know it, but I don't know if the imagesetter, with the RIP setup for right reading (image is filmed as it is sended to the RIP), is going to film RREU... I think that it depends on the way film is loaded, may be?, or the way the film is procesed in the imagesetter insides...
Thank you again,
LolaEl 16/04/2012 05:43, "Gerald Lange" <Bieler@...> escribió:
If you are preparing film negatives for photopolymer plates, you need to have the negs RREU. Right Reading Emulsion Side Up. The neg should read correctly on the dull (emulsion) side.
--- In PPLetterpress@yahoogroups.com, "tinglado_letterpress" <doloresj3@...> wrote:
> Dear list members,
> I would like to film several jobs (my first try) with an old Accuset (a lovely present from a friend), and I don't know exactly how to setup the job.
> I want to process photopolymer for letterpress, so I would like to get WRED (wrong reading emulsion down) negatives (am I right), but:
> What is the best way to obtain them?
> I design art with my favorite app (Ilustrator, Gimp, InkScape, ...). Obtain a 2.0 PS file. This file is right reading positive.
> But, what is better?
> 1) Configure accuset for printing Wrong Reading and Negative or
> 2) Send job from print setup dialog with Wrong reading / negative options selected.
> Thank you in advance an regards,