Use alum (aluminium modaen) will help you handle with yarn and color allows khrang color fresh and bright. Sometimes it makes the color gamut changes such as lime juice milk spotted. Mud, water and groundwater
Alum (aluminum Dan Morse) will hold four times and allow the yarn colors were brighter, sometimes changing hues such as lime water, alkaline water, mud and groundwater.
Use of alum (aluminum mordant). To help capture color shellac with yarn and make the fresh and bright. sometimes shades change such as muddy water and lye. 31.91, groundwater .