Extraction and Application of Natural Dye Preparations from Root Extracts of Rubia cordifolia L. | Chapter 11 | Innovations in Biological Science Vol. 1

 India’s richest biodiversity has contributed its fame as a treasure-house of plant-based natural products. We are endowed with more than 500 plant species that function as the source of natural colours. Dyes are related to cultural practices and various aspects of human life, but the attention given to natural dye-yielding plants is very less.  Natural dyes are more eco-friendly and sustainable sources than their synthetic counterparts.

 

In the present investigation, dyes were extracted from the roots of Rubia cordifolia and applied on cotton fabrics using diverse mordants viz., aluminium potassium sulphate (Alum), ferrous sulphate (FeSO4), copper sulphate (CuSO4), glacial acetic acid and myrobalan by using pre, post and simultaneous mordanting methods.  Fabrics dyed without mordanting served as control.   A dye bath was prepared by boiling the powdered root in water at 100°C.  Dyed cotton fabrics produced a wide range of colours/shades.  OD of dye baths before and after dyeing varied significantly among different mordants used.  Percentage dye uptake due to various mordants was significantly (P< 0.001) varied on mordanting methods. The highest dye uptake (72.09%) was recorded in myrobalan based post-mordanting method.  Wash fastness and rubbing fastness were in the range of 1/2nd–4/5th acceptable grades.  Thus suggest the use of madder roots along with mordants to get flamboyant shades on cotton fabric.

Author(s) Details:

Devi Priya M.,
Department of Botany, St. Thomas College, Ranni, Pazhavangadi PO, Pathanamthitta 689673, India.

E. A. Siril,
Department of Botany, University of Kerala, Kariavattom, Trivandrum 695 581, India.

Please see the link here: https://stm.bookpi.org/IBS-V1/article/view/14062

Effect of Fixatives on Color Performance of Bark Extract from Three Tropical Wetland Species for Dyeing the Fabrics | Chapter 10 | Cutting Edge Research in Biology Vol. 6

 Fixation is a stage in coloring the fabrics (including batik fabrics) with natural dyes (e.g. bark extracts) to obtain the desired color and bind the color so that the dyed fabric does not fade quickly due to sweat, washing, sunray, and rubbing/ironing. Fixation in this research that used alum (Al2[SO4]3), lime (CaCO3), and tunjung (FeSO4) individually, or any combination of the two fixatives altered the color performance of batik or other woven fabrics, previously dyed with bark extracts from tropical wetland species. Color performance of the dyed fabrics depended on, besides intrinsically/logically the species origins of bark extracts, also on mainly and manipulatively the kinds of fixatives. Performance of bark extracts with fixatives produced darker and sharper fabric colors than without the fixative use. The application of lime on Rhizophora apiculata Bl. bark extract produced dark moderate orange color; while the combination of lime and tunjung imparted very dark orange (Brown tone). On the barks of Terminalia catappa L. and Acacia mangium Willd, the combination of lime and tunjung produced a dark moderate orange color with varying intensities. On the other hand, Terminalia atappa L. bark extract treated with alum and tunjung turned a very dark grayish orange color.

Author(s) Details:

. Saefudin,
Research Center for Biomass and Bioproducts, National Research and Innovation Agency, Indonesia.

Efrida Basri,
Research Center for Biomass and Bioproducts, National Research and Innovation Agency, Indonesia.

Please see the link here: https://stm.bookpi.org/CERB-V6/article/view/10227