Pretty well all satchets come from bulk vacuum sealed yeast that is sent to packaging Companys to be repacked into sachets.
We investigated getting our yeast repackaged this way, but were informed by the yeast packers that we would get a better product vacuum sealing.
The sachets are filled by 1st flushing with a quick squirt of nitrogen & then filling with yeast from bulk hoppers before sealing. The yeast during this time is exposed to the air & from my understanding the nitrogen flush doesn't expell all the air anyway. The nitrogen flushed sachets are used as they are fast & cheap to produce. The yeast packaging Company's I contacted also took no steps to perform this process in a "sterile" air enviroment, saying it wasn't required.
I don't particularly like the idea of leaving your yeast exposed to possible contamination, but know of several excellent brewers that dispense from 500gm packs over a long period of time with no noticable ill effect.
cheers Ross
getting a bit off topic here >>
:lol: :lol: Yeah lets get back to the serious topic of stockpiling brewing products for the impending swine flu apocolypse!Half Fix off topic? Maybe. A senseless thread from the beginning? Definitely. I can't see what going O/T will really do to harm it ?? :huh:
Warren -
A senseless thread from the beginning? Definitely.
:lol: :lol: Yeah lets get back to the serious topic of stockpiling brewing products for the impending swine flu apocolypse!
exactly seeing as the world is going to end like with the particle accelerator last year.....
OT...
Dry yeast needs to be used within ~3 days once the packet is open. That is why I have an issue with repackaging from these bulk packs. It should say on the bulk pack something to this effect, I know it does on bulk Fermentis packs.
Buying bulk dry yeast (and repackaged yeast for that matter) is a false economy in my opinion.
Perhaps you need to look at your ability to store your yeast appropriately, DarrenBack off topic,
I boought a 500g brick and it was dead as doornail within three months of opening.
Cheers
Darren
Actually this thread on probrewer.com may enlighten somewhat. There's a post from a lallemand rep discouraging the continued use of yeast from an opened bulk pack. They say if you have some method of removing all the oxygen from the opened pack you should be right. Sounds like more farting around than it's worth.
Warren -
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