True frescoes are painted on wet plaster using the buon fresco technique, making the pigment a permanent part of the wall.
True frescoes are painted using the buon fresco technique, which involves painting on wet plaster. The pigment is absorbed by the wet plaster and becomes a permanent part of the wall as it dries and reacts with the air. This technique is more stable and long-lasting compared to fresco secco, which is painting on dry plaster.
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