Roger: Have you considered/tried a square of fine sandpaper to abrade the matte surface you want onto the labels? I hope this is not too low-tech or trivial, but this approach, which would take a few additional seconds of hand labor per label, would then allow you to find the best UV-resistant plastic and to use a pencil for lettering the information you'll want to know a few years from now. Jonathan Knisely New Haven, CT USA USDA 6a