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Cleaning brown glass bottles

ParkerSmithPhoto

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Anyone have any tips for cleaning residue from the inside of glass bottles? I've tried sodium sulfite and it doesn't seem to be working. Making a fresh batch of Pyrocat-HDC and I definitely do not want to risk any contamination.
 
Try to put a cotton ball in the bottle plus a small amount of water (not too much or the friction effect will not take place). Then shake the hell out of it for some minutes and repeat with some fresh cotton. Once all the deposit has gone, I flush with demineralized/destilled water and dry.
This will work in many cases. In other severe cases, you'll need to counteract with appropriate chemistry.
Sidney
 
There are many different bottle brushes available for mechanical action. You might try toilet bowl cleaner (carefully); I hate to suggest drain cleaner. I have a wine / beer bottle cleaner that attaches to the faucet and blasts the inside bottom of bottles, it works well. You may just have to experiment a bit.
 
I've used uncooked rice with a bit of water, shaken (not stirred) energetically. For something more abrasive you could try sand, though I never have. I've also used Alconox, a standard laboratory cleaner. If you do this, use it very sparingly.
 
Knowing the kind of residue would help finding the right compound to dissolve/decompose it.

I got quite some brown bottles, which a supplier uses, seemingly for cost saving, to contain a solvent. I only re-use them for liquids which will not leave a reisidue.
Otherwise I use uncoloured glass and store the bottles if necessary in a light tight box, than having the hassle of guessing on residues or, more important, precipitations.
 
I do the wet cotton ball treatment as well, and I find it does an excellent job.
 
VWP cleaner/steriliser works well ime. I've been given demijohns that had been stored unwashed after making wine that had thick dried crud on the bottom. A strong solution of VWP would shift the crud in a couple of days.
 
Chromic acid, it causes cancer and will eat your flesh, but it works great! The recipe is in all the old Kodak formula books.
Think of the staining as "seasoning" .

(P.S. the chrome cleaners will clean that up in 10 seconds, BAM!)
 
Brown rice is slightly preferable, since it's a bit more abrasive.
 
The no chrome substitute for chromic acid, still nasty and corrosive is adding ammonium persulfate to sulfuric acid. I've never tried it.
 
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