Using a spray bottle of COLD water, saturate the blue lines.
Blot up the excess water/diluted dye with a terry towel.
When using the spray-and-blot method, it's important to dilute the blue dye as much as possible; a slight spray only temporarily fades the lines as the dye migrates into the batting. Traces of blue usually show up when the fabric dries again.
Copyright ©2008, Sharon Baggs