Many modern art galleries have their own laboratories. Here scientific techniques are used to probe beneath the surface of old paintings and rediscover the methods and materials used by the masters of the past.
Michael Heckford shows some examples of these techniques and explains how a modern artist uses the technical advances of his own times to help him broaden the scope of his work.
For Schools
Repeated on Thursday at 10.5 a.m.
See page 18
(to 11.55)