The Forbes Pigment Collection

How do you know for sure if your carefully-recreated 18th-century paint would fool pass muster as art dealers a legitimate recreation long enough to get away with it? of the authentic originals? Tom Scott visits the Forbes Pigment Collection.
The Forbes Pigment Collection at the Harvard Art Museums is a collection of pigments, binders, and other art materials for researchers to use as standards: so they can tell originals from restorations from forgeries. It's not open to the public, because it's a working research library -- and because some of the pigments in there are rare, historic, or really shouldn't be handled by anyone untrained.