What does clearing QC mean?
All yeast delivered to our customers must pass a rigorous quality control program. This requires a minimum of one week of plating. If someone tells you they can propagate and deliver yeast to you in less time, they are not performing proper QC tests. The tests mandated by brewing standards require at least one week of plating. When White Labs says they can ship yeast to you the following day, for instance, this means the yeast has already cleared QC.
