[Alt-photo] Inkjet transparencies(microporous) and pigment inks

[Peter Friedrichsen]

How well does the ink from pigment printers sink into the coating of 
these transparencies?  Is the transparency easily damaged from 
scratches such that the pigment may scrape off the surface or is it 
well sunk in below the surface? Is there any need to seal the 
transparencies with whatever?

I am still using dyes but have a requirement for a stronger UV block 
as some UV still seems to pass through the photo-black dye. Do the 
pigments do a better job of blocking UV?

Peter Friedrichsen