RE: First Tricolor Gum (on aluminum)
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
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