apple starch test

For any alcoholic brew that doesn't fit into any of the above categories!
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jean-yves
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apple starch test

Post by jean-yves » Mon Oct 13, 2008 9:49 pm

how do you know that the apples are ready to be crushed :?:

the best way is to do the starch test.
when apples are fallen (say about 50% of the apples), depending of the varieties, only 50 to 75 % of the starch is convert to soluble sugar. so we often have to wait 2-3 weeks before crushing .
the best way to know if there're ready is to use iodine. you can ask in a chemistry a solution of :
for 1 litre of solution: 10 g iodine and 40g potassium iodure
the test: pour 2-3 mm of the solution in a plate, cut an apple in the middle and put it in the solution for a few seconds.
if the apples are dark blue: you have starch; if you don't have color: it's mind that the starch is convert.

this is very important to get a clear juice, and control the fermentation.

BlackBag

Re: apple starch test

Post by BlackBag » Tue Oct 14, 2008 11:32 am

Does this post make me feel good :)

I've been that busy that the 5 carrier bags of apples I gathered a month ago are still sitting on my utility room floor. It's always tomorrow that I intend to start on them. Now I don't feel as guilty. I've probably done them some good by leaving them a bit.
Smashing.

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