Understanding mordants and modifiers.
I'd like us to to look at the first six pages of this excellent article from Maiwa. Let's get an understanding of mordants and how and why they work.
"Mordants are used in combination with natural dyes to make the colours lightfast and washfast. Some Mordants, like alum, prepare the cloth to receive the dye and do not add their own colour, others, like myrobalan, tannin and iron, will impart a colour to the cloth and can be used to significantly alter the colour of a dye. It is the combination of dyes and mordants that will yield a rich spectrum of colours." Maiwa
Another great source for information about mordants is Griffin Dye Works. There's a lot of information in this article. I'd like you to read the first part and then in the section under specific mordants and modifiers click on and read the information on Alcohol, Alum, Ammonia,Citric acid, Chrome, Copper, Cream of Tartar, Glauber's Salt, Iron, Soda Ash, Tin and Vinegar (we will be using or discussing all of these)
Logwood and Brazilwood with alum mordant
More to come soon!