If one does not have enough time to focus all his or her energy into their project, it is inevitable that sometimes they will have to let the naphtha sit with the rootbark/water/lye for longer than expected which turns it yellow. As we all know, when evaporated this is kind of gross.

One can then either smoke as is, or wash/rextal it.

What if one could remove the yellow before freezing it? How would they go about it, and would there be any benefits?