Damar batu (natural gum resins) located on the semarang ,java island of indonesia. We can supply damar batu with the following grade. Damar batu bombay quality, specification : size : big, dust : 5 - 6% , moisture : dried, colour : dark brownish. Damar batu calcutta quality, specification : size : small, dust : 8 - 10% , moisture : dried, colour : dark brownish. Damar batu mumbai quality, specification : size : big and small maxed, dust : 8 - 9% , moisture : dried, colour : dark brownish.