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Abstrak Penelitian bertujuan menentukan konsentrasi fiksator jenis bahan fiksasi yang berbeda terhadap hasil kualitas kain mori primissima pewarna alami daun sirsak. Penelitian menggunakan Rancangan Acak Tersarang dua faktor. Faktor utamanya adalah jenis bahan fiksasi kapur tohor dan tawas, sedangkan faktor yang tersarang adalah konsentrasi bahan fiksasi 10%, 15%, dan 20%. Dilakukan uji organoleptik (warna dan tingkat kehalusan) dan uji fisik (intensitas warna, uji ketahanan luntur warna). Data uji organoleptik menggunakan uji Friedman, data intensitas warna dengan ANOVA dilanjutkan dengan uji BNT (Beda Nyata Terkecil) dengan kepercayaan (α=0,05) jika terdapat beda tidak nyata, dan data ketahanan luntur warna dianalisis secara deskriptif. Hasil penelitian menunjukkan perlakuan terbaik fiksator tawas pada konsentrasi 10% diperoleh nilai warna 3,93 (menyukai), tingkat kehalusan 3,83 (menyukai), nilai intensitas warna merah 14,47, nilai intensitas warna kuning 14,03, nilai kecerahan 55,4, gosokan kering dan gosokan basah 4 (baik), perubahan warna 3 (cukup baik), dan skala penodaan 4 (baik). Perlakuan terbaik fiksator kapur tohor pada konsentrasi 20% diperoleh nilai warna 3,97 (menyukai), tingkat kehalusan 4 (menyukai), nilai intensitas warna merah 18,8, nilai intensitas warna kuning 18,87, nilai kecerahan 51,1, gosokan kering 3 (cukup baik), dan gosokan basah 2 (agak baik), perubahan warna 2 (agak baik), skala penodaan 3-4 (cukup baik). Kata kunci : Daun sirsak, fiksasi, pewarna alami Abstract This research aims to determine concentration of fixator from different material fixation types to quality primissima results soursop leaves natural dyes. Research using Random Design Nested by two factors. The first factor is type of material fixation unlike lime and alum, the nested factor is concentration of fixation 10%, 15% and 20%. The parameters to test is organoleptics test (color and smoothness) and physic test (color intensity and color fastness test). Organoleptics data results using Friedman test, intensity data with ANOVA and if  there is no real difference continue with BNT (the smallest Real Difference) trust (α = 0.05), fastness color data with analyzed descriptively. The analysis showed best concentration of alum is 10% obtained value on color 3.93, smoothness 3.83, redness value 14.47, yellowness value 14.03, brightness value 55.4, dry rub and rub 4, color change 3 and scale desecration 4. The best concentration in unlike lime is 20% obtained value on color 3.97, smoothness 4, redness value 18.8, yellowness value 18.87, brightness value 51.1, dry rub 3, wet rub 2, color change 2 and scale desecration 3-4. Keywords : Fixation, natural dyes, soursop leaf

Natural Dye of Soursop Leaf (Annona muricata L.) for Mori Primissima Fabric (Study: Types and Fixation Concentrations)