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#1
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Chem storage in polycarbonate?
These are a popular item at the local outdoors store in 1-qt. size.
Polycarbonate has the advantage of being unbreakable. Since I keep my chems in a closet I don't need amber coloration. Does anyone have a feel for the effectiveness of this material at keeping out the O2? How about the lids, they're probably something else like HDPE or LDPE? I know about soda bottles (PET) but am reluctant to use them because my 4-year-old nephew is at that stage where he believes anything in a soda bottle must be soda... Thanks. Steve |
#2
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On 11/3/2004 3:24 AM Stephan Goldstein spake thus:
These are a popular item at the local outdoors store in 1-qt. size. Polycarbonate has the advantage of being unbreakable. Since I keep my chems in a closet I don't need amber coloration. Does anyone have a feel for the effectiveness of this material at keeping out the O2? How about the lids, they're probably something else like HDPE or LDPE? I know about soda bottles (PET) but am reluctant to use them because my 4-year-old nephew is at that stage where he believes anything in a soda bottle must be soda... There was a discussion of this (storage qualities of various materials) here in the not too distant past, and the data showed that the best materials in descending order are glass[1], PET and then polyethylene (HDPE/LDPE). I think polycarbonate was there somewhere with PET--that is, better than PE, which is not very good as it's not very impervious to O2. Someone should post this stuff again. (Can't find it myself just at the moment.) [1] Of course, just as important as the bottle material is the stopper. Chemicals stored in glass with a lousy stopper fare no better than those stored in PE. -- .... voting for John Kerry now is like voting for LBJ in 1964 with full precognition of what he was going to do in Vietnam for the next four years. - Alexander Cockburn in _Counterpunch_ (http://counterpunch.org/cockburn10282004.html) |
#3
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On 11/3/2004 3:24 AM Stephan Goldstein spake thus:
These are a popular item at the local outdoors store in 1-qt. size. Polycarbonate has the advantage of being unbreakable. Since I keep my chems in a closet I don't need amber coloration. Does anyone have a feel for the effectiveness of this material at keeping out the O2? How about the lids, they're probably something else like HDPE or LDPE? I know about soda bottles (PET) but am reluctant to use them because my 4-year-old nephew is at that stage where he believes anything in a soda bottle must be soda... There was a discussion of this (storage qualities of various materials) here in the not too distant past, and the data showed that the best materials in descending order are glass[1], PET and then polyethylene (HDPE/LDPE). I think polycarbonate was there somewhere with PET--that is, better than PE, which is not very good as it's not very impervious to O2. Someone should post this stuff again. (Can't find it myself just at the moment.) [1] Of course, just as important as the bottle material is the stopper. Chemicals stored in glass with a lousy stopper fare no better than those stored in PE. -- .... voting for John Kerry now is like voting for LBJ in 1964 with full precognition of what he was going to do in Vietnam for the next four years. - Alexander Cockburn in _Counterpunch_ (http://counterpunch.org/cockburn10282004.html) |
#4
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(Stephan Goldstein)
Go bottle shopping at www.tri-esssciences.com . Also look for their nice selection of caps. Save for a few special types of bottle I use the Polyseal cone insert caps. I think they must supply the best possible seal. My Boston Rounds use those caps. Tri-Ess has those rounds in amber and clear. I think there is a Polyseal to fit any size Boston Round. You'll save money buying them. I know how much Outdoor gear costs. And don't worry they are GLASS. They've a lot of other gear plus some chemistry. Dan |
#5
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(Stephan Goldstein)
Go bottle shopping at www.tri-esssciences.com . Also look for their nice selection of caps. Save for a few special types of bottle I use the Polyseal cone insert caps. I think they must supply the best possible seal. My Boston Rounds use those caps. Tri-Ess has those rounds in amber and clear. I think there is a Polyseal to fit any size Boston Round. You'll save money buying them. I know how much Outdoor gear costs. And don't worry they are GLASS. They've a lot of other gear plus some chemistry. Dan |
#6
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RE; David Nebenzahl wrote
There was a discussion of this (storage qualities of various materials) here in the not too distant past, ... Someone should post this stuff again. (Can't find it myself just at the moment.) Did you search this NG for, canning lids ? Do so. Dan |
#7
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RE; David Nebenzahl wrote
There was a discussion of this (storage qualities of various materials) here in the not too distant past, ... Someone should post this stuff again. (Can't find it myself just at the moment.) Did you search this NG for, canning lids ? Do so. Dan |
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