Back in the summer we did some tie dye. They came out pretty ok and where very happy. Not most vibrant ever but nice enough.
At the weekend we did exactly the same again but came out after wash really faded
I have done some research and a lot of people are using soda ash first. We haven't done that. Next time we will.
However we have dyed a bedsheet without soda ash and will be washing it out tonight. Is there anything we can do to make dyes stick better when washing out? I have seen one youtube vid with someone using cold water salt and vinegar? Will this help?