The Joneses wrote:

>>>The USDA guidelines call for a pH _below_ 4.7 for safe BWB
>>>canning.
>>
>>I'm taught 4.6 is the magic number, Edrena.
>>(Why the oil in that sauce? Anyone?)
>>--
>>-Barb, <www.jamlady.eboard.com> Sweet Potato Follies added 2/24/05.
>
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> 4.6 is below 4.7 right? Best said 4.6 and below maybe.
> Edrena
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>

There is a whole lot between 4.6 and 4.7. It's not a linear scale.

Bob