Complete the account of the aqueous media.
The binder of both watercolour and gouache is gum ______. The area of wet plaster a fresco painter can finish in one working day is a ______. Acrylic dries by water leaving and the polymer particles ______ into a continuous film. In buon fresco, calcium hydroxide takes up carbon dioxide and turns into calcium ______, locking the pigment into the wall.
Word bank: arabic · giornata · coalescing · carbonate · tragacanth · hydroxide
Hints
- The second blank is an Italian word meaning a day's work.
- The last blank is what limestone is made of.
Show the answer
The binder of both watercolour and gouache is gum arabic. The area of wet plaster a fresco painter can finish in one working day is a giornata. Acrylic dries by water leaving and the polymer particles coalescing into a continuous film. In buon fresco, calcium hydroxide takes up carbon dioxide and turns into calcium carbonate, locking the pigment into the wall.
The third blank is the one with consequences. Coalescence is physical and needs warmth, so an acrylic film made in a cold studio may never form properly however long it is left, unlike an oil film, which is waiting on a chemical reaction rather than on the weather.
Practise Aqueous Media
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