PAINTINGS:
Protection For Oil Paintings.
Oil paintings, aquarelles, etc., may be also coated with a thin layer of Canada balsam, and placed smoothly on a pane of glass likewise coated with Canada balsam, so that both layers of balsam come together. Then the pictures are pressed down from the back, to remove all air bubbles.
To Renovate Old Oil Paintings.
PAINTINGS, TO CLEAN: See Cleaning Preparations and Methods.