Re: [photo-3d] Behind the curve

["Don" <don@xxxxxxxxxxxxxx>]

From: "Don" <don@xxxxxxxxxxxxxx>

> Does anyone know of a technique to produce curved cards similar to
the old
> Keystone views using currently available materials?  How did they
get the
> old cards curved?  I once met someone who assumed cards they had
purchased
> at an antique store were warped with age and set about trying to
straighten
> them out.   Jim
>
Well, at the risk of being email-stoned I will admit that I have
flattened cards before.
It seemed practical to flatten them before copying them. I scan my
homemade
cards (either drymounted or in Q-Vue mounts) sometimes by just feeding
them into my
photosmart s20 scanner. They're flat. So when I wanted to copy vintage
cards, either
scanning or photocopying, I flattened them. It makes it real easy to
get web pairs. So
when I wanted to copy cards that were curved I.......

Ok, ok, I didn't destroy anything rare and unique. Cards that were
part of curved sets I
just recurved them when I was done. Just make a curved mold in which
to cool the card.

Experiment to find the adhesive release temp. Heat and dry the mold,
buffer matboard, etc
to just below the release temp. Put the flattened card in the press,
heat to desired temp,
open press, slap in mold and clamp in place until cool.

Ideally you should be real comfortable around a dry mount press and
have some experience
mounting and unmounting flat prints. I was very careful to work
quickly and right at the
release temp. I didn't have any failures, but then again I haven't
done it enough with enough
different cards to assure your results. The classic mounting tissue
used seems reversible.

Don't do this to anything rare and unique. Practice. Know how to dry
mount. Practice on
similar, expendable cards. (Is that enough disclaimers?)

I personally don't see advantage to curved mounts, except to
collectors. I wouldn't go out
of my way to curve mounts of my photos. The theory that curving
reduces reflections and
matches the curvature of field of the viewing lens doesn't impress me.

Blame me for this and I'll swear that vandals broke in my house and
posted this message.

Email me offline if you need more detail.

don


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