Of Stucco and Gesso.
stucco-duro fell into disuse, and coarse pargetry and modelled plaster ceilings became in later years its sole and degenerate descendants.
Gesso is really a painter's art rather than a sculptor's, and consists in impasto painting with a mixture of plaster of Paris or whiting in glue (the composition with which the ground of his pictures is laid) after roughly modelling the higher forms with tow or some fibrous material incorporated with the gesso; but it is questionable if gesso is the best vehicle for any but the lowest relief. By it the most subtle and delicate variation of surface can be obtained, and the finest lines pencilled, analogous, in fact, to the fine pâte sur pâte work in porcelain. Its chief use in early times was in the accessories of painting, as the nimbi, attributes, and jewellery of the personage represented, and it was almost entirely
