Limbah Kulit Biji Coklat (Theobroma cacao Linn.) sebagai Pewarna Alami

Kain Mori dan Sutra (Pengaruh Jenis Fiksatif terhadap Ketuaan dan

Ketahanan Luntur Ditelaah dengan Metode Pengolahan Citra Digital RGB)

Cocoa’s Shell (Theobroma cacao Linn.) as Natural Colorant on Cotton and

Silk (The Effect of Fixative on the Depth of Shade and Fadeless as Reavealed by

RGB Digital Image Processing Method)

Oleh

Tirza Thea

NIM : 652009015

TUGAS AKHIR

Diajukan kepada Program Studi Kimia, Fakultas Sains dan Matematika

guna memenuhi sebagian dari persyaratan untuk mencapai gelar Sarjana Sains

Program Studi Kimia

Fakultas Sains dan Matematika

Universitas Kristen Satya Wacana

Salatiga

2014

Limbah Kulit Biji Coklat (Theobroma cacao Linn.) sebagai Pewarna Alami Kain

Mori dan Sutra (Pengaruh Jenis Fiksatif Terhadap Ketuaan dan Ketahanan

Luntur Ditelaah dengan Metode Pengolahan Citra Digital RGB)

Cocoa’s Shell (Theobroma cacao Linn.) as Natural Colorant of Cotton and Silk

(The Effect of Fixative on the Depth of Shade and Fadeless as Revealed by

RGB Digital Image Processing Method)

Tirza Thea Lewita Sumasa*, A. Ign Kristijanto**, Hartati Soetjipto**

*) Mahasiswa Program Studi Kimia Fakultas Sains dan Matematika

**) Dosen Program Studi Kimia Fakultas Sains dan Matematika

Universitas Kristen Satya Wacana

Jalan Diponegoro 52-60 Salatiga – 50711

theatirza@gmail.com

ABSTRACT

The objectives of this study are : firstly, to determine the effect of fixative types on the

depth of shade color of cotton and silk which stained using extract of cocoa’s shell. Secondly, to

determine the effect of fixative type on the fade proof color of cotton and silk toward washing.

Thirdly, to determine the effect of fixative types on the fade proof color of cotton and silk toward

washing and ironing. And all three were revealed by RGB digital image processing methode.

The result of this study showed that : 1) The use of “tunjung” as fixative on cotton

produce the darkest color for all hue in comparison to verdigris and alum, respectively. While

on silk, “tunjung” showed the darkest color for all hue, prusi and alum had the same depth of

shade of color in red and grey hue, but brighter to alum in green and blue hue 2) Cotton and

silk material showed fadeless of color toward washing treated for all hue with “tunjung” as

fixative, on the contrary, verdigris showed fade of color in all hue exception in green hue on

silk, and alum showed fade of color in red and grey hue on cotton, blue and grey hue on silk, 3)

Cotton material showed fadeless of color toward washing and ironing for all hue with prusi as

fixative, on the contrary “tunjung” and alum showed fadeless of color in red hue, while on silk

didn’t showed fade of color exception in blue hue with alum as fixative.

Key words : cacao’s shell, natural colorant, cotton, silk, RGB