Re: Retraction Fw: Question about FX-2


Steve Shapiro (sgshiya@redshift.com)
Tue, 25 May 1999 07:05:35 -0700


Subject: Re: Retraction Fw: Question about FX-2

> I think we are over emphasizing the accuracy of carbonate. It is used only
as
> the accelerator, and it is used basically only to set the pH.
>
> For a strong acid or base (such as Sodium Hydroxide), even if you double
the
> amount, the pH change is at most 0.30 (pH is in log scale, so we get the
> familiar one stop, 2 times, 0.30).
>
> But for weak acid or weak base (such as carbonate), the change for
doubling
> the amount won't even be that high. The pH will remain about the same.
What
> you get by giving more chemical is better buffering.
>
>
> Dave S
>
What about the Pancryptol yellow? Wouldn't twice the amount slow devlopment
such that push processing would have to be extended in time before any
apprciable reaction, and that in turn would leave it open for expanded
grain, no?



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