You can also get Arm & Hammer Washing Soda at most grocery stores in the US, 
usually near the laundry detergent.

-Jason Halprin

 From: Carrie Schreck <>
To: Experimental Film Discussion List <> 
Sent: Thursday, January 5, 2012 3:21 PM
Subject: Re: [Frameworks] caffenol processing with 16mm?

REALLY? color? that's interesting will try that, do you remember your timing 
for the hi-con? also where did you get the washing soda?
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