Good points Joe. I will put some PE through a sample, at 'normal'
temps, then test both heat and cold stability.

If it was only a cold precipitate issue (potassium tartrate or similar)
then it should have been starting to clear and precipitate, or so it
seems to me. But the haze is a suspended heavy cloud - giving me cause
to think it's a protein hazing. Thanks again.


On 2008-04-13 03:23:38 -0700, Joe Sallustio > said:

>
>>> Bentonite fining improves heat stability; it doesn't affect cold stability.
>
> I'm not sure about that in this case, there is no guarantee it's heat
> stable either. This could be a pectin problem though, why not warm it
> and add some PE to a small sample?
>
> If that didn't do it would refine with more bentonite, you said it
> was a light fining. Chill haze can be caused by excess protein,
> anything that gets rid of excess protein would help if that is the
> issue. It's easy to test, that is why fining trials are recommended.
> If it's not cold stable it's probably not heat stable either.
>
> Joe