Explain types of dyes in brief with its advantages and diadvantage
Answers
Dyes are colored organic compounds that are used to impart color to various substrates, including paper, leather, fur, hair, drugs, cosmetics, waxes, greases, plastics and textile materials. A Dye is a colored compound, normally used in solution, which is capable of being fixed to a fabric.
Advantages of Natural Dyes. Natural dyes are biodegradable, non-toxic and non-allergic. They do not cause any health hazards and hence they can be used easily without many environmental concerns. The shades produced by natural dyes/colorants are usually soft, lustrous and soothing to the human eye.
Cost – A larger amount of natural dyes may be needed in order to dye a specific amount of fabric as opposed to synthetic dyes. For instance, one pound of cotton may be dyed with just five grams of synthetic dye, whereas 230 grams of natural dye are needed to dye the same amount of material. Since that is the case, using natural dyes is more expensive than synthetic dyes.
Color pay-off – Color pay-off from natural dyes tend to fade quickly. More so, quality may not be as consistent than what synthetic dyes can deliver.
Availability – Another issue with natural dyes is their availability. It can be difficult to produce because the availability of raw materials can vary from season to season, place, and species, whereas synthetic dyes can be produced in laboratories all year round.
Harmful Effects – Natural dyes can also be harmful to some extent. Logwood has ingredients, hematein and hematoxylin, that can be have harmful effects when inhaled, ingested, or absorbed through the skin. Bloodroot, another natural dye source, can cause irritation and inflammation when inhaled. More so, natural dyes may need mordants for application. While these substances help the dye stick to fabrics, they can also be toxic. Example of mordants used in natural dyes are aluminum, copper, iron, and chrome.
Sustainability – While natural dye sources are renewable, sustainability can still be an issue for natural dyes because producing them require vast areas of land
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