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The study is to determine the ingredients effect the turmeric (Curcumae longae) treatment of Akaa (Corypha) midrib fiber, toward the surface morphology and chemical properties. The material used was a natural fibers, soaking in water 1 hour, by heating a turmeric solution 1 hour (TT1), 2 hours and 3 hours. The heating of 86°C - 90°C at 1 atmosphere pressure, and dried of 28°C-32°C at 48 hours. The turmeric solution was turmeric powder 20% and water 80% in volume. The surface morphology and the roughness was tested by scanning electron microscope and the roughness test. The chemical properties by hidrolisis and the X-Ray diffraction test. The results, that changing of the fiber surface morphology and the roughness decrease after treatment. The TT1 treatment increases the cellulose 22% and reduced the lignin 42%, also the sharpest peak diffraction pattern which was indicated an increases on the crystal level.