David McCormack wrote:I understand that this technique requires double sided tape very close to the art work.
It does indeed, between 3 & 5mm, but the best stuff is very thin and you burnish the film on to it, it would take some seriously bad handling for it to come away and the item to slip on to the adhesive.
The pinching this creates near the extremities of the item is one of the three things that work for encapsulation/overlay; the other two are slight pressure from the convex side of the sheet at the centre and the static charge.
I have a very (very) old framer's label in an overlay mount as a prop, it's just bunged in my mount caddy with the corner samples and due to lots of handling slips all the time now - (we're talking one or two millimetres) but the overlay has not come away from the double sided tape and I regularly give it a good knock to centralise it in the aperture.
But Melinex is very versatile and if you really do not want any adhesive on the front of the mounting board, you don't have to have any - you can, for example, make a fat
+ shape and pass the 'legs' through the mounting board, (see my topic 'Sophie' - and that's a lump of pottery). You could also cut a piece of mount board to the exact size of the item, place the item on that and then wrap two sheets of film around that, one horizontal around the item and the board and one vertical around all of that. How you fix that to your mounting board doesn't matter really.