Indonesia is probably the largest producer and exporter of gutta-percha. Annual exports were (3-)195(-366) t in 1988-1993, but these figures may not be reliable. In 1963-1972 average annual imports in the United States from Indonesia were 1140 t. Average annual gutta-percha exports from Singapore in 1961-1980 were 225 t. These figures include gutta-percha from other ''Palaquium'' species and ''Payena leerii'' (Teijsm. & Binnend.) Kurz. Early in the 20th Century the average annual world consumption of gutta-percha was 850 t, but average annual exports over the period 1900-1920 from Singapore of 14 000 t have also been reported. Exports of "getah merah" (only gutta-percha from ''P. gutta'') from Kalimantan and Sumatra were 4-51 t/year in the period 1928-1938. Exports of gutta-percha from plantations in Java were 35-230 t/year in 1927-1940.
== Adulterations and substitutes ==
The true gutta-percha is often blended with gutta-percha of inferior quality from other ''Sapotaceae'' species.
== Properties ==