Production Techniques and Chemistry > Colloidal Gold Production
Cleaning colloidal gold Stained Glass Cup
xozhang3:
One of my small glass cups has been used for quite while for colloidal gold. I was at a loss when I tried to clean it such that the ruby red hue in it's wall disapears. I tried soap, dish washing liquid, and hydroperoxide to no avail. Finally I tried a few drops of Lugol's solution and it worked! The only drawback is my index finger got stained with iodine, which dispeared on its own sometime later.
Josie29:
Good find for colloidal gold removal!
To get rid of Lugol stains .... dampen powdered Vitamin C (ascorbic acid) and rub onto stain. This works on inanimate objects and will probably work on fingers too!
xozhang3:
Good tip! We got colloidal gold, iodine, and VC, we can supplement while doing the cleaning :D
xozhang3:
I have been gel capping colloidal gold lately. This makes it easy to clean the cup and beaker using dish cleaning liquid.
Neofizz:
--- Quote from: Josie29 on March 29, 2021, 08:52:23 PM ---To get rid of Lugol stains .... dampen powdered Vitamin C (ascorbic acid) and rub onto stain. This works on inanimate objects and will probably work on fingers too!
--- End quote ---
Great tip there Josie29, if you happen to have Vitamin C powder.
I was able to get similar results using white vinegar (acetic acid).
I did this as an experiment after reading your post.
Stained my finger with Lugol's, soaked a rag with vinegar and used it like a washcloth on the area. Stain gone after a couple minutes.
Decided to try this because I don't have Vitamin C powder but do have a jug of vinegar.
Is there anything vinegar can't do? ;)
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