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Most often acrylic paint. One type is called magna.
Lichtenstein's 'Thinking of Him': Magna on canvas....... 68 x 68 inches; 172.7 x 172.7 cm .. ..1963.
Magna is a kind of acrylic paint.
Lichtenstein used oil and Magna paint in his paintings. He has also created sculptures.
Hutton Magna, County Durham.
Appleby Magna, Leicestershire.
Canford Magna, Dorset.
Chew Magna, Somerset.
Sheepy Magna, Leicestershire (I kid you not).
Fontmell Magna, Dorset.
There are probably more.
The Magna Carta document