I was told today that my juice was cloudy because they hadn't put the additive in it that makes it clear.
My question is: What is the additive they put in apple juice to change it from cloudy to clear?
(after reading this: http://www.ncbe.reading.ac.uk/ncbe/protocols/inajam/pdf/jam01.pdf)
They usually use pectinase (http://en.wikipedia.org/wiki/Pectinase) to break down pectin molecules to help mechanical filtration.
They also use gelatins to help clump up particules to help mechanical filtering.
For homebrewers; (making hard cider or even regular)
Any homebrew shop will carry the supplies needed.
You could use much the same process for regular cider,