Art does not have lungs or the stoma, which plants
have through which they breathe. If any respiration occurs around art, it will come from
bugs or molds and mildews... not good. As has been said, oil has to oxidize as it ages and
premature glazing might be an issue. Acrylic paint
goes through two phases, evaporation of included
water, which leaves holes in the paint surface
and exudation of surfactants, which goes on for
a few weeks. Most items presented for framing should be well past both of these reactions and
glazing is critical to protect the paper, as Ron
noted.