Shenanigans
Well-Known Member
Now I remember why I have a 10 year old bottle of glycerin in the cupboard.I think that I have read that more than 10% glycerine in the final solution is actually detrimental.
I was all up for doing this when I got back into brewing and ordered it but there was so much conflicting information I just gave up on the idea.
Now after more brewing experience I'm more relaxed.
Like a lot of home brew processes, perfection is not required to get acceptable results. It probably doesn't give the best results possible but as long as it works to store the yeast for extended periods and can be propagated enough to brew a batch within a week of defrosting then that's fine.
Now on a commercial scale perfecting the process can be much more critical of course.