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Old 25th April 2020, 06:51 AM
robinb robinb is offline
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Thats what I thought as well Martin

its a modified version of d72 for colour paper reversal and apparently acts as a restrainer but I'm no chemist
I notice there is a Typo in the amounts
its actually 0.2g per 1000ml

I'm presently struggling to measure so little ...
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