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

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
[email protected]
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