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Ah, Sharon. Just the brain I need to pick today... .
I have two big panels of 1/4" black Sintra sitting in the corner of my studio. My plan is to use them as a backing for my charcoal/Nupastel drawings on sanded ABS. The black Sintra is around 6" larger on all sides than the ABS, so it will act as a "mat" for the drawing. I've sprayed the drawing with archival spray varnish. The object of this whole enterprise is to come up with something that doesn't have to be glassed over, which is the big drawback about doing large drawings. Have you ever tried spray varnishing your pastels?
Questions:
1. have you ever glued ABS to Sintra? what do you think, contact cement? I plan to give the Sintra a light sanding first, mostly to knock off slight dings and scratches in my pieces.
2. I'm thinking of putting a piece of wood on the back to put screw eyes in to hang this thing. Again: contact cement, do you think?
3. I thought these plastics only absorbed UVA if they were sanded first.
4. An engineer told me that Sintra is a foam and more susceptable to UVA penetration that regular ABS. Is this wrong?
I'm now going to your other post to read about gessoing Sintra. But you wouldn't need to do this unless you wanted more tooth on your surface, right?
I've been fiddling with these problems for months. Since the drawings aren't commissions I've had to put them on the back burner when I get a lot of paying work through the door.
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