The joy Of Citric Acid

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No idea. I have certainly kept citric acid mix in a sealed plastic container for a couple of months with no obvious loss of omph.
To be honest it is so quick and cheap to make a batch I tend to just put it down the sink once it starts to get too dirty and make a fresh batch.
I decant mine into a 25lt container, filtered through a filter.
The crud settles out, then that gets disposed off.
Then I had more citric acid powder as and when I want.
 
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This set of snips was striped and boiled in Citric acid.
Ratio
1 table spoon to 1 lt of water.




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The rust is gone, the pits were there before the dip in Citric. Here they have had a coat of machine wax.
 
Did anyone figure out how to turn the liquid into a "paste", so that it can be applied to surfaces that are too large to dip in a container ?
 
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