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Here's a nifty use for hairspray. Lightly spray a bit of hairspray (aerosol, not pump) onto charcoal, pastel chalk, or lead pencil art work to "fix" the medium in place until you can get it framed, stored, or permanently fixed with a commercial product.
By Teresa Bowen from Vine Grove, KY
To preserve your little treasure's artwork, a fine mist of hairspray over the child's drawing will "fix" the medium. It works best for unstable mediums such as chalk, pencil, and pastels which can easily smudge.
Source: My art teacher
By Monique from Somerset, UK., Weston-super-Mare