See Working with Kettle Dyed Yarn for details on how you should deal with dye lots and why they are important.
The colorfastness of our yarn is a big deal to us and we work very hard to be sure it is never an issue. We do have some guidelines on soaking your yarn before blocking that will further help with colorfastness at Working with Kettle Dyed Yarn.
We will be happy to discuss our options with you. Please email us with what exactly you are looking for and we’ll see what we can do. Sales@StunningString.com
We love to work with designers. You can find out all about it and how to apply at Designer Yarn Support.
Currently no, just through our Events and on our website. It may be something we consider in the future, so check back.