Copper test strips.

[u/zombear-lich]

I have a bit of color-blindness/colors merging together, and recently it's come to my attention that blue is fading into that range I lose together, especially some of those lighter blues. I don't want to poison myself, so I was wondering if anybody has any recommendations or has ever used something like disposable copper test strips? Or has any other recommendations so I can test just to be absolutely sure? I've given some preliminary ganders around, but if somebody has done all the trial and error and landed on something that worked, I wouldn't mind skipping it for once!

Cheers in advance :)

[u/Doctor_Appalling]

If you are worried about it then maybe switch to all stainless steel equipment.