The method he recommended for keeping the colours pure in the lights, viz. to place the tints next each other unmixed, and then slightly to unite them, may have degenerated to a methodical manner in the hands of his followers. Boschini, who speaks of Rubens himself with due reverence, and is far from confounding him with his imitators, contrasts such a system with that of the Venetians, and adds that Titian used to say, "Chi de imbratar colori teme, imbrata e machia si medemi."—Carta del Navegar, p. 341. The poem of Boschini is in many respects polemical. He wrote at a time when the Flemish painters, having adopted and modified the Venetian principles, threatened to supersede the Italian masters in the opinion of the world. Their excellence, too, had all the charm of novelty, for in the seventeenth century Venice produced no remarkable talent, and it was precisely the age for her to boast of past glories. The contemptuous manner in which Boschini speaks of the Flemish varnishes, of the fear of mixing tints, &c., is thus always to be considered with reference to the time and circumstances. So also his boasting that the Venetian masters painted without nature, which may be an exaggeration, is pointed at the Naturalisti, Caravaggio and his followers, who copied nature literally.
"Veri Precetti della Pittura," p. 123.