Re: Adhesion: Silane and gum

Thanks Dave,
I wanted to print my entries for this particular show on glass, since
the show is a tacit protest against a proposed liquid natural gas
monstrosity near the mouth of the Columbia and I thought printing on
glass would be a way to conceptually emphasize the fragility of the
beauty of the area and of its wildlife. I wasn't able to realize my plan
for this show because of an accident that I'm still recovering from,
but this was a test print I made before that happened.
kt

Dave Rose wrote:
>
> Dear Katharine,
>
> I love your picture of the ducks. I live about 150 yards north of the
> Shoshone River, a major drainage in NW Wyoming. I'm intimately familiar
> with waterfowl and appreciate their beauty.
>
> Best regards,
> Dave Rose
> Big Wonderful Wyoming
>
> ----- Original Message -----
> From: "Katharine Thayer" <kthayer@pacifier.com>
> To: <alt-photo-process-l@sask.usask.ca>
> Sent: Friday, March 04, 2005 7:26 AM
> Subject: Re: Adhesion: Silane and gum
>
> > If anyone's interested, I scanned my two attempts at printing on
> > silane-treated glass, along with the same image printed on physical
> > tooth on glass for comparison.
> >
> > http://www.pacifier.com/~kthayer/html/silane.html
> > kt
> >
> >
> > Katharine Thayer wrote:
> > >
> > > P.S. Whoever said that silane might be difficult to remove from glass
> > > wasn't just woofin'. I've spent an hour and five razor blades scraping
> > > away at it and there are still places where it just won't come off. If
> > > this were just regular window glass, I'd toss it, but this is non-glare
> > > glass that I paid $8.75 a sheet for, so I've got to keep at it. (If
> > > anyone's interested, the etched side of the glass is the side the print
> > > is viewed from; the gum is printed on the back (non-etched) side of the
> > > glass).
> > > Katharine
> > >
> > > Katharine Thayer wrote:
> > > >
> > > > I've obtained some silane which I hope is the same silane mentioned
> > > > below (Martin Mueller's post from Feb 5). The supplier calls it gamma
> > > > aminopropyltriethoxysilane and it's what they sent me when I asked for
> > > > 3-aminopropyltriethoxysilane. I've seen the two names used
> > > > interchangeably and they have the same CAS number, so I'm hoping it's
> > > > the same substance. (Sorry, my knowledge of organic nomenclature is
> far
> > > > in the past so I can't tell by looking at the names why they would be
> > > > the same thing).
> > > >
> > > > At any rate I've applied this silane, mixed 1% with acetone, to two
> > > > carefully cleaned and de-greased and alcohol-treated (thanks Galina!)
> > > > sheets of glass, left them overnight, and printed gum on them this
> > > > morning. Some observations:
> > > >
> > > > (1) The wet gum coating didn't stick as well to the silane-treated
> glass
> > > > as it does to plain glass, nor did it brush as smoothly as it would on
> > > > plain glass; it seemed to be phobic to the silane.
> > > >
> > > > (2) The exposed and hardened gum frilled off the silane-treated glass
> > > > exactly as it would from plain untreated glass.
> > > >
> > > > (3) An added annoyance: Dichromate stains along the edges of the
> > > > brushmarks, that simply will not clear with potassium metabisulfite
> > > > treatment.
> > > >
> > > > However, now that I have re-read Martin's post one more time, I think
> I
> > > > need to try it again, because I didn't apply it exactly as he
> > > > recommends. I misremembered the directions and applied the material
> > > > with a tissue and then simply left it to evaporate, instead of
> rubbing
> > > > it til it evaporated, as instructed.
> > > >
> > > > So I will try it again, following the instructions precisely, but this
> > > > can't happen until there is another nice day, (it's raining today)
> > > > because I have to work outside with the acetone.
> > > >
> > > > Katharine Thayer
> > > >
> > > > MARTINM wrote:
> > > > >
> > > > > Another approach consists of using silane for the subbing: rub the
> > > > > (clean/degreased!) glass plate with a 1% freshly prepared acetone
> solution
> > > > > of 3-aminopropyltriethoxysilane over one or both sides with a tissue
> for
> > > > > about 1 min until the solvent has evaporated. Allow the glass plate
> to stand
> > > > > for several hours to ensure reaction of the silane. On that layer
> your gum
> > > > > solution will firmly adhere.
> > > > >
> > > > > Some time ago (maybe in 2002 or 2003 - take a look at the archives)
> Philippe
> > > > > Monnoyer recommended incorporating silane into a gelatin solution.
> It may be
> > > > > a good idea to add a small amount of that above mentioned silane
> mixture to
> > > > > your gum solution.
> > > > >
> > > > > Martin
> >
Received on Sat Mar 5 10:20:57 2005