Grant Gillard wrote:

>Bill,
>
>You refer to "store bought" Ox Acid.  The only local store bought stuff I can find is commonly called "wood bleach," or specifically the brand name Savogran (out of Norwood, MA).
>
>
Most all the Wood Bleach products are Oxalic acid and state so clearly
on the label. The one I bought from a True Value store (now Ace) was
"Bondex" and below the name "oxalic acid crystals"

If I recall correctly (and I know I will have help here) it is oxalic
acid dihydrate, but the only difference is in how much of that to use
compared to pure OA (molecular weight 126.06 for dihydrate rs 90.0 for
pure OA). Add to the confusion, the dihydrate is often named oxalic
acid, just like the Bondex.

As I noted in my first and second post, my numbers were based on two
year old European research and may have changed. But so far, the
numbers, amounts and methods seem to be in line with my post. In any
case, it worked fine for me, but it would be nice to get definitive
numbers for the dihydrate, if there is a difference.

Bill Truesdell
Bath, Maine

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