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Old 09-04-2007, 10:03 PM   #1
killian
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Default antique carboys

I just found a few carboys on craigslist. The guy I got them from said that they were from the 60's. when I got them home I noticed that a couple of them had what looks like a little metallic looking spot in the glass on the bottom. One of them has polar water in big letters on the side. has any one ever heard of anything like this?



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Old 09-04-2007, 10:17 PM   #2
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No....but beware of lead. And I mean it this time....I'm not saying this because I want to start yet another paranoid lead thread. If you have lead in your primary you will definitely be drinking it!



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Old 09-04-2007, 10:45 PM   #3
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how would I know if there is lead in there?

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Old 09-04-2007, 10:49 PM   #4
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...and why would there be lead in there?

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Old 09-04-2007, 11:02 PM   #5
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If you are concerned there is a lead test kit you can buy. PRO-LAB's Professional Lead Surface Test Kit is one. Better to be safe and spend the $10 so you know for sure.

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Old 09-05-2007, 12:32 AM   #6
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If the spot is in the center of the base, on the outside, then it's probably a pontil mark. That's where they held the bottle while forming it. If that's where it is/ what it is, then the metal there is probably iron and graphite.

If the metal is on the outside of the bottle, I wouldn't worry about it and would enjoy using my antique carboys to make some fine beer.

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Old 09-05-2007, 12:36 AM   #7
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I would imagine that the lead-paint test kit from any paint supply store should be as useful at testing for lead as any other lead test - I could be wrong of course.

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Old 09-05-2007, 09:23 PM   #8
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You didn't mention whether the metal was on the inside or not....I just wanted you to be aware because I know that lead was used in manufacturing a lot more 50 years ago.

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Old 09-06-2007, 04:58 AM   #9
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the mark is on the out side and Im thinking sudsmonkey is right about the pontil but Im still not sure. I think all of the carboys are from the late 60's one of them has 1969 on the bottom. I have been researching this and I havent been able to find much but I did find some info from a glass blower who said that I probably didnt have to worry about it but I would like to be sure.

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Old 09-08-2007, 02:56 PM   #10
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killian,

I'd be leary about any metalllic markings or anything on those carboys that won't come off with any washing or sanitizing. My first Q upon coming across old containers like that would be: "What were they really used for?"

Is it possible they contained anything toxic at any time during their history? If so, I'd be careful about that. Sometimes, trace amounts can linger despite all attempts to remove them.

If you are confident about their history, I'd consider filling them with a choice sanitizer solution and let sit for at least a week followed by a good cleaning and scrubbing with a long bottle brush before using them in the home brewery.

Whatever the outcome, good luck.

Cheers!



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