A Review on Onion Skin, a Natural Dye Source

Abstract

he skin of the onion plant is a natural waste product. In this context, it is possible to evaluate their use in natural dyeing (cotton, wool, silk, etc.) and in lake pigment production by extracting the dyestuffs in these wastes. The skin that forms this outermost part contains some flavonoid (quercetin, etc.) and anthocyanidin (pelargonidin, etc.) natural dyestuffs. Quercetin glycosides are flavonoids liable for the majority of the flavonols in the plant. The amount of quercetin may increase from the inner part of the onion plant to the outer part. It is known that onion skin has been used in wool dyeing from past to present. It has traditionally been used in carpets and rugs. Onion skin was used in Anatolia, Turkey, where carpets and rugs were produced.

Exploring the discoloration potential of Propolis extract and Morus nigra syrup on restorative dental composites: an in vitro study

“…Phenolic compounds are divided into two groups as phenolic acids and flavonoids. Besides flavonoids and phenolic contents are polyphenolic antioxidants showing antimicrobial activities in oral cavity ( 17) that also responsible from the sour flavor of fruits and vegetables, and some provide yellow, yellow-brown, red-blue color tones (18).…”

Potent Natural Dyestuffs from Onion Skin to Fabrics Using or Lacking Bio-Mordants

“…When considering alternative natural dyes, onion skin dye is comparatively colourfast. It works rather well to dye animal-based fibres like silk and wool, but less so on cotton and linen [31,35]. The colour of red onion skins is deeper than that of yellow, which can be either peachy yellow or even orange, as shown in (Figure 3).…”

“…Because of this, natural dyes made from these vegetable wastes can provide economic benefit and create jobs. Therefore, hand-woven carpets and rugs could benefit from using these wastes for dyeing [31].…”

“…A vivid chromatic colour known as lemon yellow is created when wool that has been mordanted with alum is cooked in the same water for an hour. Tones that are coppery yellow can be created by boiling wool that has been mordanted with chrome in this water [31]. The fastness of onion skin, which is generally considered to be low, varies based on the Potent Natural Dyestuffs from Onion Skin to Fabrics Using or Lacking Bio-Mordants DOI: http://dx.doi.org/10.5772/intechopen.1005579 fastness of the other dyestuffs used in combination with it.…”

Study the Seam Stitch of Silk Garment Properties Dyed with Natural dyes

“…Recently, interest in dyeing silk fibers with natural dyes has increased. The silk was dyed with a dye extracted from onion peel using different mordant individually such as alum, stannous chloride, both Couper sulphate and ferrous sulphate, tartaric acid, and tannic acid [5][6][7]. Natural dyes are distinguished by beautiful shades fluorescent, and colours from industrial dyes.…”