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Amazon Shop: Parafilm, Petri Dish

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OfflineShaw
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Pyrex petri dishes imperfect rims?
    #2889194 - 07/14/04 12:57 PM (13 years, 11 months ago)

I finally got out the glass petri dishes i ordered a while ago, and the rims seem to have a glass drip which makes the edge imperfect. Is this just a benign flaw of the manufacturing process, or a problem. the covers wobble a bit when in place. I was thinking this might be to let air in after autoclaving. i had some autoclavable plastic ones that sealed shut and caved in ocasionally.


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Edited by Shaw (07/14/04 01:10 PM)


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OfflineAnnoA
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Re: Pyrex petri dishes imperfect rims? [Re: Shaw]
    #2889712 - 07/14/04 02:58 PM (13 years, 11 months ago)

There should be air coming into the petri dish.
Since you are sealing with with a breathable tape anyway (Glad Wrap or Parafilm), there is no danger of contaminants entering the dish.

>i had some autoclavable plastic ones that sealed shut and caved in ocasionally
The plastic petris I have have a 4 nudges at the top of the dish that prevents a perfect seal of the cover.


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Amazon Shop: Parafilm, Petri Dish

Mushrooms, Mycology and Psychedelics >> Advanced Mycology

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