Digital BW, The Print

Phil,
I use the standard T hinge method. It's the bottom of the T that is 
noticeable, as the rest is hidden behind the mat.

I prefer thicker board (front and back) which has less flex, so even 
though they're only on the edges, I suspect the Nielsen springs put 
enough pressure on the sandwich overall to make the relatively thick 
tape eventually show through. I use glossy papers exclusively, which 
I'm sure make it more noticeable.

In the future I will experiment with deeper frame channels and/or true 
tissue-type hinging tape. May also be that some papers resist the 
show-through better than others.

Doug

On Sep 7, 2004, at 11:53 AM, 
DigitalBlackandWhiteThePrint@yahoogroups.com wrote:

> From: "Phil Rose" <pjrose@...>
> Subject: Re: hinge tape visible through photo (WAS: Dry Mounting Ink 
> Prints - other mount
>
> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, Doug I.
> <puzzolente@s...> wrote:
>> I've noticed the hinge outline popping up too lately with the
> Lineco
>> gummed archival hinging tape. I don't think it has so much to do
> with
>> the hinging method used (well...unless you were using a really thin
>> tissue), but more to do with the really powerful spring clips that
> come
>> with the Nielsen frames I buy. They put a lot of pressure on the
>> mat/photo/glass sandwich.
>
> I doubt that that this can explain the "outline" problem--which I
> haven't (yet) encountered with my Lineco hinging tape. The Nielsen
> springs do exert a lot of pressure, but it's concentrated at the
> extreme edge of the sandwich. With the usual cardboard backing, this
> pressure will likely be very much diminished within the window area of
> the mat (unless your mats have _very_ narrow borders). However I
> wonder if the outline problem might be due to your method of hinging:
> do you use a "T-hinge" or a "V-hinge" method?  With the "T" method the
> hinge is taped to the backing board well _above_ the print (under the
> mat border) so that only a relatively short, single layer of tape is
> under the print. But in the "V" method, the hinge is _folded_ and so
> several layers of tape lie beneath the print, and this could increase
> the possibility of a visible outline.
>
> Another possible explanation for development of a tape outline could
> be if there's any differential swelling/shrinking between the print
> and tape. For example the print paper might undergo a slight overall
> expansion due to humidity changes, but this change might be prevented
> within
> the small area(s) that are tightly glued to the hinge tape. This then
> might
> produce an outline of the hinge--especially if the glue (gum) dries
> down to a rigid, glassy substance (gelatin glues do this). Of course
> the liklihood of humidity-induced dimension change depends very much
> on the paper type.
>
> Phil