Do I need to follow the ‘blanching’ with a cool rinse?
No, that’s only with vegetables and macaroni!
We have a perfectly-timed product closure time and effects that other (build-up) products need to be forced into. Just say “NO” to cool rinses! It is not recommended as we get plenty of shine without it.
And no, doing it anyway (the ‘more is better’ approach) will not give you even more shine. The important ingredients in the Longhairs® products (link opens new window) will not soak in right or fall into place in the right times if you do a cool rinse; we just don’t need that sort of ‘help’ like your old products did.