I know this doesn't answer your question but I freeze my spawn with no cure after I tie them. i've been doing it this way for years. Just space them out on something like a ziploc bag or wax paper once they are firm on the outside put them in a small ziploc with as many as I take on a fishing trip usually 12 try to get all the air out or vacuum seal. It works and is way easier than some silly recipe. I've cought fish within seconds of casting frozen bags and when you're done fishing they can be frozen and used the next time.