The Effect of Light and Dye Composition on the Color of Dyeings with Indigo 6-Bromoindigo...
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The Effect of Light and Dye Composition on the Color of Dyeings with Indigo 6-Bromoindigo 6,6'-Dibromoindigo Components of Tyrian Purple Aygul Islamova, John Scalise, Derrick Claye, Ioannis Karapanagiotis, Christopher Cooksey, Sasan Karimi and Keith Ramig Department of Natural Sciences Baruch College of the City University of New York Presented By: Aygul Islamova, John Scalise May 9 th , 2015
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Transcript of The Effect of Light and Dye Composition on the Color of Dyeings with Indigo 6-Bromoindigo...
The Effect of Light and Dye Composition on the Color of Dyeings with
Indigo 6-Bromoindigo
6,6'-DibromoindigoComponents of Tyrian
PurpleAygul Islamova, John Scalise, Derrick Claye, Ioannis Karapanagiotis, Christopher
Cooksey, Sasan Karimi and Keith Ramig
Department of Natural Sciences Baruch College of the City University of New York
Presented By: Aygul Islamova, John ScaliseMay 9th, 2015
N
N
O
OH
H
N
N
O
OH
H
N
N
O
OH
H
Br Br
Br
6-Bromoindigo(MBI)
6,6'-Dibromoindigo(DBI)
Indigo
Source: O. Lavinda et al./ Dyes and Pigments 96 (2013) 581-589
“Leuco” Formation
Source: O. Lavinda et al./ Dyes and Pigments 96 (2013) 581-589
Leuco: standard condition
Colorimetry CIELAB Color Space
• Lightness: L* _L*
• Hue: a* -(a*) b* -(b*)
• Color Difference:
Euclidean Distance ΔEab*
http://pengantar-warna.blogspot.com/2011_03_01_archive.html
-5
0
5
10
15
20
25
30
35
a*
a*
a*
-(b*)
-(b*)
-(b*)
Hue Comparisons for 1st passes of Wool dyeing with Indigoids
a*,
-(b
*)
IND MBI DBI
Standardizing Dyeing Conditions
MBI wool
pass avg s.d. s.d. %
L* 34.2 2.8 8
1st a* 21.4 0.9 4
b* 25.4 0.2 1
L* 41.4 0.4 1
2nd a* 17.5 1 6
b* 27.2 0.3 1
A B C0
5
10
15
20
25
30
a*
a*
a*
-(b*)
-(b*)
-(b*)
Effect of Light on Color MBI dyed Wool
Dyeing Conditions
a*,
-(b
*)
STD INCFLU
ΔEab* for Standard vs. FLU, INC
FLU ΔE 10.4 INC ΔE 21.6
Future Research Goals• HPLC analysis in studying debromination
• Mixture indigoid dyeings: equimolar IND:MBI, MBI:DBI
• Study whether there is a difference in affinity for the fabric between indigoids
• To determine the ratio of indigoids in the dyeing vat VS. on the fabric using CIELAB data and HPLC analysis
Equimolar Indigoid Mixture Dyeing
DBI DBI:MBI MBI MBI:IND IND
1st Pass
2nd Pass
Acknowledgements
• Mentor: Dr. Keith Ramig
• Collaborators:
o Baruch College: Derrick Claye
o Queensborough Community College: Sasan Karimi
o University Ecclesiastical Academy of Thessaloniki,
Thessaloniki Greece: Ioannis Karapanagiotis
o Watford, Hertfordshire England: Christopher Cooksey
Thank You
Thank You Sonia
Department of Natural Sciences Baruch
Dr. RamigDr. Gernert
BIOMED
Dr. Greer
Niel
Dr. Kulatilleke
Dr. Barbour
Dr. Bourkoff
Dr. Wahlert
Dr. Schawaroch
Dr. Szalda
Dr. Butler
Dr. Catto
All Faculty
