I have to take issue with you a bit on the first two sentences.liviud wrote:Yarn dyeing with natural dyes is superior dyeing yarn with chemical dyes. The Yarns dyed using natural methods are much more resistant to light and heat. In nature, there are millions of sources of natural dyes. ...
One of the reasons we use so many chemical based dyes these days is because they are superior to plant based dyes in a number of ways. These include:
- Colour Fastness during washing
- Light fastness
- Range of colours
- Brilliance of colour
- Consistency & repeatability between batches
- Colour density
- Quantity of active colourant required is much less
I do agree that there are a large number of plant dyes, and many have very subtle colours, many being less harsh than chemical dyes, and sometimes being much more attractive. So, in some specialist situations, used by very knowledgeable people, plant dyes give an amazing and beautiful result. However, the reason why the global textile industry uses mostly synthetic dyes is founded on the fact they offer considerable advantages in terms of cost, durability and use of natural resources compared to plant dyes.
I will now take my professional engineer's hat off.
Regards,
Richard.