Many people have noticed that their shinos come out better if they glaze a couple of weeks in advance; unless I am mistaken, this is due the the soda ash having additional time to migrate to the surface where it can do its good, carbon-trapping work.
Due to some family stuff, I have delayed my upcoming firing until Thursday the 23rd, unloading on the 26th, but I glazed my shinos first. That allows a week of ash migration, which is less than ideal.
So, how to encourage the ash migration in the time alloted? I covered the pieces immediately after dipping, so the coat of glaze would stay damp longer, allowing the soda ash freer movement.