Re: Hard gloss coating and mounting a digital print onto a rigid surface

----- Original Message -----
From: "Ryuji Suzuki" <rs@silvergrain.org>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Monday, August 01, 2005 10:48 AM
Subject: Re: Hard gloss coating and mounting a digital print onto a rigid
surface

> Polyester doesn't accept many chemical adhesions (film manufacturers
> use a few steps of very tricky processes to coat emulsions on them) so
> your best bet is mechanical means of bonding, such as screws, staples,
> clips, etc. to mount the picture on the board.

Note that low concentrated gelatin may actually provide sufficient adhesion
on PET. My D.I.Y. silver halide emulsions (2% gelatin solution) survived
all the subsequent processing steps on PET.

> Most common polyester for film base is PET, poly(ethylene
> telephthalate). This material melts at a rather low temperature.

...if you consider 250°C a low temperature...
I guess you're alluding to some special copolymers like PETG.
Regular PET (Mylar, Cronar etc.) has a relatively good heat resistence.

Martin

> Polyester doesn't accept many chemical adhesions (film manufacturers
> use a few steps of very tricky processes to coat emulsions on them) so
> your best bet is mechanical means of bonding, such as screws, staples,
> clips, etc. to mount the picture on the board. Another possibility is
> to make a set of oversize clear mounting corners with another piece of
> polyester film, and secure these with staples, etc. to the
> board. Obviously, in your presentation, they will be visible. But it
> may work, especially if generous borders are given.
>
> If you are using non-transparent base board, and if you can make slits
> on them, I would consider S-hinges to hold the prints in place. I
> tried a few different methods to mount 20 inch square prints (made on
> paper, mounted on 24 inch square form core) but nothing was better
> than S-hinges. I found S-hinge very easy to work with and they are
> very strong. V-hinges are deceptively simple but the actual operations
> are more frustrating and they break easily when a large print is
> mounted.
>
> Most common polyester for film base is PET, poly(ethylene
> telephthalate). This material melts at a rather low temperature.
Received on Fri Aug 5 12:03:24 2005