Originally Posted by Suthrncomfrt1884
PP means "plain paraffin". It has wax on the inside so it's probably meant to hold some sort of liquid. A lot of times people put it on barrels because it helps with leaks.
I don't think your barrel should be used to brew with, but I'm not positive.
I don't know, everything I just found on google about barrels and brewing/winemaking is that they ARE supposed to have a layer of parrafin inside.
Barrels were manufactured by coopers employed by breweries. When assembled, the barrel was tarred. This consisted in covering the inside of the barrel with a thin layer of the so-called Okocim mass (paraffin), which was to protect the beer from the contact with wood. Next, the barrel was legalized (i.e. its volume was defined). On the bottom of the barrel its volume, number and the brewerys name were seared with a branding iron. Oak barrels had different volumes: 25 litres (quarters), 50 litres (halves), 100 litres (wholes) and 200 litres (doubles).
There's even barrel parrafin sold on homebrew websites. So I would assume it is OK to use, but I'm no expert.
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