|Autor/es:||del Val, Susana; Zunino, Cristina; Martínez, Laura; Martínez, Marisa; Reñones, Laura; Bartoloni, Valeria; Frangie, Sofía|
|Palabras clave:||Tintura; Productos vegetales; Colorantes naturales; Extracción de colorantes; Telas; Algodón; Medio ambiente|
| Ver+/- |
Susana del Val (1), Cristina Zunino(1), Laura Martínez(1),
Marisa Martínez(2), Laura Reñones(2), Valeria Bartoloni(2), Sofía Frangie(2)
(1) National Institute of Industrial Technology, Textile Center.
(2) National Institute of Industrial Technology, Chemistry Center
The dyes were extracted, using simple and environment friendly methods, from agroindustrial waste
and selected native species. The dyeing properties were evaluated regarding the yield of the process
and the colorfastness of the dyed fabrics. Until today more than twenty powder colorants were
obtained from vegetal materials with a responsible management of wild natural resources. All of them
were used to dye woven fabric made of pure wool without the use of common mordants.
Also the colorants were used for printing cotton fabrics.
Textile materials without colorants cannot be
imagined and dyeing has been widely used since
ancient times. Ecological and sustainable
production methods are very important nowadays.
In this work both, the extraction of colorants and
the process of dyeing were studied taking into
account these aspects.
The colorants obtained in the laboratory were then
obtained at a pilot plant scale (1:50). The
necessary changes in methods were evaluated in
the textile laboratory. It was possible to close the
complete cycle: available raw material, satisfactory
extraction of colorants and good performance in
dyeing and printing.
For textile dyeing the most promising colorants
come from: peanut, onion, walnut, yerba mate and
urunday, vegetal species extensively distributed in
Results and Conclusions
Some results are shown in the following figures.
1 6 11 16 21 26 31 36 41 46 51 56 61 66 71 76 81 86
time in minutes
temperaure in C
Dyeing with peanut colorants at
Dyeing was carried out in a laboratory equipment
(Labomat Mathis) in the following conditions:
pH 4.5 (acetic acid)
Dyeing was tested at different concentrations of
colorant, being possible determine that
concentrations higher than 3% don`t increase the
R.B temperature gradient time
1:10 100 ºC 3 ºC/ min 60 min
Paper ID: 147
Natural colorants were also used to print cotton
with good results.
Different natural dyes at 3%
concentration on wool
According to results of dyeing it is possible to
infer that an important number of the colorants
obtained are suitable for protean fibers, with
good or very good colourfastness to washing. It
is important to emphasize that it was possible
using a simple process with no mordants.
urunday walnut onion yerba mate peanut
intensity of color.
Colorfastness to washing. ISO 105 C06 A1S
transf/ CO transf/ WO ch/co lo r