answer:A few options exist. Press it between two pieces of uv glass, then have the glass framed. End result looks as though the artwork is floating, especially if it’s neuview non reflective glass… very expensive. But as long as it’s uv glass, that would add at least thirty years to the life of acidic paper. You can also buy a can of uv spray and most art shops. In this case, I’d recommend flat (non gloss). Spray the artwork with multiple coatings, drying a few minutes in between. Then mount between glass sheets as stated above, or mount with non acid adhesive to non acid matte board. Frame with glass pressed against piece, or float it above the artwork a bit so it doesn’t touch. The best method for preservation would involve placing the artwork in an acid free glassine and putting it in a dark dry place inside an acid free box. But then you couldn’t display it.