History of Gendong Herb
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The result showed that the handlers had similar knowledge about the usage of "jamu gendong". The primary raw material which composed the recepies were similar except for the ajuvant. They handled them simple and traditional. There are 8 kinds of recepies: beras kencur, kunir asam, sinom, cabe puyang, pahitan, kunci suruh, kudu laos, and uyup-uyup/gepyokan. There are two technics on producing "jamu gendong" that are first, boiling all the herbs and second, squeeze the pounded herbs and than poured into boiled water. They did not use standart measurement (kilogram etc.), on the contrary they use handfuls, pieces to estimate the proportion of recepies.
Sources: http://www.tempo.co.id/medika/arsip/052001/art-1.htm