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Mattisfat
Learning


Registered: 01/20/16
Posts: 570
Loc: Newcastle, England
Last seen: 3 years, 21 days
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Can i buy pressure cooker safe caps for these?
#23715013 - 10/07/16 02:37 AM (7 years, 3 months ago) |
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I bought these to make slants as they are PP5 but the caps melted in the PC http://www.ebay.co.uk/itm/120906908255
Is there caps that i can buy which will fit or do i need to buy new test tubes?
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FriedEgg


Registered: 09/22/14
Posts: 2,536
Loc: Taiwan
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Re: Can i buy pressure cooker safe caps for these? [Re: Mattisfat]
#23715137 - 10/07/16 04:55 AM (7 years, 3 months ago) |
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maybe you could buy rubber stoppers of the same diameter. but i think you should just buy proper tubes
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blindingleaf
blue collar underworld


Registered: 07/19/13
Posts: 22,008
Loc: sub-surface unseen
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Re: Can i buy pressure cooker safe caps for these? [Re: FriedEgg]
#23715172 - 10/07/16 05:34 AM (7 years, 3 months ago) |
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that link says they are PP not PP5,so mightn't stand up to 15PSI.
i have little tubes that are PP2 or 3, so I just cook them at 5PSI and they come out fine.
-------------------- A few thoughts on cultivation MICROBIAL HUSBANDRY!!!! The whole is greater than the sum of its parts
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Mattisfat
Learning


Registered: 01/20/16
Posts: 570
Loc: Newcastle, England
Last seen: 3 years, 21 days
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Re: Can i buy pressure cooker safe caps for these? [Re: blindingleaf]
#23715252 - 10/07/16 06:27 AM (7 years, 3 months ago) |
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Quote:
blindingleaf said: that link says they are PP not PP5,so mightn't stand up to 15PSI.
i have little tubes that are PP2 or 3, so I just cook them at 5PSI and they come out fine.
pp means polypropylene which is pp5
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Mattisfat
Learning


Registered: 01/20/16
Posts: 570
Loc: Newcastle, England
Last seen: 3 years, 21 days
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Re: Can i buy pressure cooker safe caps for these? [Re: Mattisfat]
#23715253 - 10/07/16 06:29 AM (7 years, 3 months ago) |
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Does anyone know a UK supplier for good tubes? the ones ive bought are my second lot because my first lot were crap as well - uk seems so much harder to get equipment than the US
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blindingleaf
blue collar underworld


Registered: 07/19/13
Posts: 22,008
Loc: sub-surface unseen
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Re: Can i buy pressure cooker safe caps for these? [Re: Mattisfat]
#23715257 - 10/07/16 06:31 AM (7 years, 3 months ago) |
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Quote:
Mattisfat said:
Quote:
blindingleaf said: that link says they are PP not PP5,so mightn't stand up to 15PSI.
i have little tubes that are PP2 or 3, so I just cook them at 5PSI and they come out fine.
pp means polypropylene which is pp5
FTFY
-------------------- A few thoughts on cultivation MICROBIAL HUSBANDRY!!!! The whole is greater than the sum of its parts
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Mattisfat
Learning


Registered: 01/20/16
Posts: 570
Loc: Newcastle, England
Last seen: 3 years, 21 days
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Re: Can i buy pressure cooker safe caps for these? [Re: blindingleaf]
#23715297 - 10/07/16 06:48 AM (7 years, 3 months ago) |
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blindingleaf
blue collar underworld


Registered: 07/19/13
Posts: 22,008
Loc: sub-surface unseen
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Re: Can i buy pressure cooker safe caps for these? [Re: Mattisfat]
#23715308 - 10/07/16 06:52 AM (7 years, 3 months ago) |
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Quote:
There are several types of plastics – some being safer than others. Plastic products are commonly marked with a number enclosed by the recycling symbol, which is typically found on the bottom of the product. This symbol is used to identify the plastic and recyclability of the product.
some plastic just won't hold up in high heat.
-------------------- A few thoughts on cultivation MICROBIAL HUSBANDRY!!!! The whole is greater than the sum of its parts
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bodhisatta 
Smurf real estate agent


Registered: 04/30/13
Posts: 61,889
Loc: Milky way
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Re: Can i buy pressure cooker safe caps for these? [Re: blindingleaf]
#23719294 - 10/08/16 12:20 PM (7 years, 3 months ago) |
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#5 plastic is PP. Pp5 doesn't exist its PP and the number 5
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mushboy
modboy



Registered: 04/24/05
Posts: 32,281
Loc: where?
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Re: Can i buy pressure cooker safe caps for these? [Re: bodhisatta]
#23719307 - 10/08/16 12:23 PM (7 years, 3 months ago) |
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pp5 can be PC'ed and wonton soup come in it too..
read up about pp ratings for plastics. its kinda alarming.
https://en.wikipedia.org/wiki/Resin_identification_code
http://www.healthychild.org/know-your-plastics/
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