RE: First Tricolor Gum (on aluminum)
Hi Gord, I buy my aluminum from an industrial printing-supplies provider. The sheets are intended to be used in printing presses but as they are coated on one side with a light sensitive surface, there are expiration dates after which the plates are sold as scrap. Recently, quite by accident I met the owner of a printing company in Peoria. He told me that they recently gave an entire truckload of plates away to a scrapper. Tons of stuff I missed out on! Keith -----Original Message----- From: Gordon J. Holtslander [mailto:gordon.holtslander@usask.ca] Sent: Monday, December 11, 2006 1:04 PM To: alt-photo-process-l@usask.ca Subject: Re: First Tricolor Gum (on aluminum) Keith: I'm interested in using gum on aluminum - can you give us more information about your sheet aluminum - what are potential sources? Thanks Gord On Monday 11 December 2006 9:24 am, Keith Gerling wrote: > Hi Loris, > > Congratulations on your print! It was daring using an image with > predominant light areas (steps and walls), but you succeeded. > > Although the turnaround time using aluminum (and like Henk I use offset > material) is very fast drying with a hairdryer - the primary reason I > prefer aluminum is the easy and razor-sharp registration capability. I use > an ice pick and punch right through the material. The holes are very small > and are easily "patched" when the print is complete. Sometimes I place the > registration holes slightly inside the border of the image where they are > better hidden and more likely to be filled with gum emulsion. I've also > tried the tape approach. Two small overlaying pieces of masking tape work > fine. The ice pick punched the tape and leaves only a small dent on the > aluminum. > > A couple of questions for you: How big is the print? And, I think you may > have addressed this, but have you given up on using Yupo? I would seem > like the gelatin/marble powder would behave the same, with the added > advantage of being already white and translucent. > > Mounting on Plexiglas is a very good idea. And a prudent one as well > regarding safety of the print. I'll be very interested to hear how that > works out. > > Nice work! > > Keith > > -----Original Message----- > From: Loris Medici [mailto:mail@loris.medici.name] > Sent: Monday, December 11, 2006 8:32 AM > To: alt-photo-process-l@usask.ca > Subject: RE: First Tricolor Gum (on aluminum) > > > Silk paper on aluminum is an interesting idea indeed. But that's not > what I'm after... Noted for future projects tough - thanks! > > I currently use nails for registration - it's good when it works but > having to pierce the plate is disturbing... On the next try, I will put > opaque electrical tape on diagonal corners (such as top-top left, and > bottom-bottom right / please note that every corner has two registration > marks), align the negatives and then punch the tapes. Thay way, there > will be exactly aligned holes surrounded with opaque material on every > negative - registration by eye (w/o harming the plate) will be very easy > then. (I hope...!) > > Regards, > Loris. > > -----Original Message----- > From: henk thijs [mailto:henk.thijs@hetnet.nl] > Sent: 11 Aralõk 2006 Pazartesi 12:07 > To: alt-photo-process-l@usask.ca > Subject: Re: First Tricolor Gum (on aluminum) > > > Hi Loris, > I also use aluminum 'sheets' (used offset material), but i glue a very > thin chinese silkpaper on it with some rabbit glue. Then the 'normal' > gelatine-glyoxal etc. gum treatment. > The effect of the alu-shiny-surface through the thin silk-paper is were > i am looking for. Registration with a 'steel scratch tool' in line with > marks on the plain paper neg. > Cheers, > Henk -- Gordon J. Holtslander Dept. of Biology gordon.holtslander@usask.ca University of Saskatchewan Tel 306 966-4433 112 Science Place Fax 306 966-4462 Saskatoon SK., CANADA homepage.usask.ca~gjh289 S7N 5E2
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