[en] The general function of mangrove forest is mainly for protecting thesustain ability of sea shore against the wave toss, however, the fishermenhas often used the mangrove wood to produce their ships, building and otherthings. Among others, this wood also contains of chromophore, tannine,furfurol and phtalic that has the possibility to serve as textile dyes,however its fixation ability to silk fiber in this dyes does not have strongfixation ability to silk fiber. In other to improve its color fastness it wasnecessary to do after treatment with mordant. In this study the waste fromthe mangrove in the form of shredded wood, wood bark or twig and small branchwere used as the raw material of the natural dyes. This materials werechopped as small as possible (into saw form) and being extracted in order toobtain the dyes as much as possible. As the result of this study wasaddressed to the small and medium scale industries, the extraction processwas carried out in a simple way using water as medium with various ratios inthe respected order 1:10; 1:20; 1:30; 1:40; and 1 :50. To obtain theextracted yields, the mangrove waste was extracted until it reached the ratioof 1/5 to the medium, the extracted sample was taken out to be extractedagain in fresh water as medium in the same ratio variation. This process wasrepeated until no more wood color to be extracted (± 9 repeats). Theextracted liquid was then put into evaporation, drying and grinded into dyespowder. The highest extracted yields was obtained by the ratio to medium(1:40 to 1:50) with 9.40% -9.48% extracted yields. The following experimentwas dyeing process to silk fabrics by using dyes powder or dyes liquidextracted from medium with ratio 1:40 mixture from first extraction up toforth extraction. The dyeing process was carried out without mordanting,pre-mordanting and post-mordanting, by means of Tawas (Al₂K₂(SO₄)₃) orTunjung (FeSO₄ . 7 H₂O) as mordanting material. The dyed silk fabrics werethen tested for its color depth, color shade and color fastness to washing,rubbing and to sun light. It was concluded from this experiment and testingevaluation that the extracted yields from mangrove waste can dye silk fabricwithout mordant indicated that extracted yields from mangrove waste containchromophore or natural pigment for textile dyes. The color depth of dyeingwithout mordanting is lighter compared to the mordanted ones. Mordanting withTawas and Tunjung giving slightly different color shade and color depth, withpre-mordanting obtains darker color compared to post-mordanting. Colorfastness of dyed fabrics without mordanting is fairly good and withmordanting is good. (author)