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Washing Cups

chadders1966

By chadders1966
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chadders1966 WRT Addict

chadders1966

Posted
Posted

Hi

I bought some of these https://www.cousinsuk.com/product/diamond-gemstone-washing-cup?code=G39601from Cousins to wash items in my ultrasonic without having to use baskets. All I have done at the moment is place the cleaner and rinse in the jars. Pretty soon after the cleaner (L&R Extra Fine) turned blue. Obviously it must be a reaction with the sieve. I have a vague recollection that copper + ammonia = blue.

Two questions - am I right? Is that likely to be the cause? Is the fluid still usable, or is it contaminated? Thanks.

Stephen

oldhippy Distinguished Member

oldhippy

Posted
Posted

You are right copper + ammonia = blue. If there is water in it then it has become contaminated and I would dispose of it. That is all I can find for you. 

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chadders1966 WRT Addict

chadders1966

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Posted

Hi

Thanks for the response, it's good to know my memory still works;). There won't be any water as there is nothing in there apart from cleaning fluid, which has presumably reacted with the sieve. It's no real problem to dispose of as there is only about 100ml, but I hate to waste it. I'm just wondering if it is still OK to use, despite the change in colour.

Stephen

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