U of S | Mailing List Archive | alt-photo-process-l | RE: I'm back! Hi to all + Silane?

RE: I'm back! Hi to all + Silane?



Thank you Marek. Yes, this is exactly the compound I was planning to
purchase (from Sigma-Aldrich or Fluka)...

Carbon prints on glass (by back exposure) sounds interesting. I remember
that you also did gum prints on glass with the same method. I'm definitely
interested -> I would like to read your notes very much! (About both
carbon and gum on glass by back exposure...)

Regards,
Loris.

23 Haziran 2008, Pazartesi, 10:59 pm tarihinde, Marek Matusz yazmış:
>
> Loris,
> Sorry it took me a while to reply and welcome back. I was out of town for
> several days and could not get to my notes. I have tried the silane
> approach last summer and it works great for gelatin and gum. They do
> adhere very well to the treated glass. The particular silane in question
> is aminopropyltriethoxysilane, widely used in industy to bond fiberglass
> to resins. Here is a website on the product.
> http://www.dowcorning.com/applications/search/products/details.aspx?prod=02649659&type=PROD
> There is a usefull PDF file that you can download on that page (called
> Chemical manufacturing) that gives useful tips on treating glass.
>
> If you are interested in prints on glass I would suggest a different
> approach. Carbon prints on glass. No messy transfers. The trick is back
> exposure. That hardens the gelatin at the glass surface and the unexposed
> image on the top can just be washed away. I never had any problems with
> adhesion of the image on just clean glass, no special treatments. I guess
> hardened gelatin just sticks to the glass. The advantages of this process
> are that you can use any pigments of your liking. Transparent organic
> pigments work well just as well as traditional pigments like carbon.
> The only drawback is that for very sharp images you will need a collimated
> light source, since the emulsion and negative are separated by the
> thickness of the glass. Sun works very well. You should have plenty of
> that in Istanbul.
> I would be happy to supply more info on emulsion that I used,
> sensitization, etc if you are interested.
> Marek