Croixia oxleyana (Pierre) Baehni
Dichopsis pustulata (Dunstan) Hemsl. ex King & Gamble
Palaquium pustulatum Dunstan
Palaquium oxleyanum is a tree growing up to 25 metres tall.
The tree is a source of gutta-percha, which is harvested from the wild and used locally.
Southeast Asia - Thailand, Malaysia.
Lowland and hill forest[
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A gutta-percha is obtained from the tree[
]. Gutta-percha is a natural latex obtained from the sap of the tree. Allowing this fluid to evaporate and coagulate in the sun produces a hard, durable, non-brittle but non-elastic latex which can be made flexible again when heated to temperatures over 50Â°c, and then retains any form given while cooling. Prior to the advent of synthetic materials, gutta-percha had a wide range of uses - most particularly as an insulating material for electricity wiring and for underwater telegraph wires, a purpose for which it is very well suited since it is bio-inert and so is not attacked by marine plants or animals. Gutta-percha can be moulded into any shape and has been used to make items such as ornate furniture, pistol grips, acid-resistant receptacles and â€˜mourningâ€™ jewellery, where its dark colour was an advantage. It has been widely used as the core of golf balls and is still used in modern dentistry where its bio-inertness makes it ideal as a temporary filling for teeth and as a filling material inside tooth fillings[
]. It is used locally for fixing tools into their handles[
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