Weld is the most lightfast of the yellow dyes, and the brightest and clearest yellow flower dye with a distinct green caste. Lime green can be obtained in combination with indigo.
Use 0.25 - 0.75 % WOF for light shades, 1 - 2 % WOF for medium and 3 % WOF for a darker shade.Adding Calcimu Carbonate ..