Yarn is Universal Bamboo, Merino, & Nylon Sock Yarn from paradisefibers.com. PLEASE USE REFERRAL CODE 6419105 IF YOU MAKE AN ORDER. Paradise has free shipping quite frequently.
I soaked yarn in warm water with 1/4 cup vinegar, about 10 min.
I used a spoon to apply the different colors.
Here's link to tutorial by Bloomingknitter on youtube.com.