c. 1600 (n.), "art of encaustic painting;" 1650s (adj.) "produced by burning in," from Greek enkaustikos, from enkaiein "to burn in" from en (see en- (2)) + kaiein "to burn" (see caustic). "Strictly applicable only to painting executed or finished by the agency of heat" [Century Dictionary].
1. Encaustic painting was the ancient method of fixing pigments with heated wax.
2. The batik pictures are the combination of the encaustic and dyeing.