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Arctic_Fox
Mr. Furious


Registered: 03/13/23
Posts: 460
Loc: Ontario
Last seen: 4 days, 7 hours
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Why is my parafilm garbage?
#28377098 - 06/27/23 08:50 PM (1 year, 6 months ago) |
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I ordered Parafilm from Amazon. I ordered it twice to be sure. Either it was 15 years old or it was left in in a 35°C warehouse for a few summers, because it was totally ruined. It was brittle and tore easily. Even the box the roll comes in fell apart when I picked it up because the glue holding it together had gone yellow and had no stickiness at all.

People say parafilm can dry out if it's left exposed to air — a theory which I am dubious of, because the datasheet merely says to "store in a cool, dry place", and the manufacturers themselves do not use airtight packaging.
Why is this happening, and where can I get good parafilm?
Edited by Arctic_Fox (06/27/23 08:53 PM)
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Yuggoth
Mi-Go Cultivator



Registered: 03/04/23
Posts: 558
Loc: Lost Carcosa
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Re: Why is my parafilm garbage? [Re: Arctic_Fox] 2
#28377139 - 06/27/23 09:33 PM (1 year, 6 months ago) |
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When you buy on Amazon who actually sends the item can vary day to day.
I recently got some Parafilm and it was fine. My order said:
Sold by: Daigger Scientific a Weber Scientific Company
Maybe you had a different vendor trying to sell off stale Parafilm they found in an abandoned bomb shelter.
I now await they "don't use Parafilm" posts.
-------------------- We have not succeeded in answering all our problems. The answers we have found only serve to raise a whole set of new questions. In some ways we feel we are as confused as ever, but we believe we are confused on a higher level and about more important things. -- Earl C. Kelley
Things I really wish I knew when I started // Vacuum sealer discussion thread // Shroomery gif zoo
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Arctic_Fox
Mr. Furious


Registered: 03/13/23
Posts: 460
Loc: Ontario
Last seen: 4 days, 7 hours
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Re: Why is my parafilm garbage? [Re: Yuggoth]
#28377184 - 06/27/23 10:58 PM (1 year, 6 months ago) |
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The garbage ones I got were sold by "Jmd International". The product is well reviewed, but there were a few reviews complaining of exactly this problem. Unfortunately reviews do not differentiate on sellers, and due to warehouse binning practices you can never be sure where it really came from anyway.
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stroopwafelman


Registered: 03/21/23
Posts: 386
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Re: Why is my parafilm garbage? [Re: Arctic_Fox]
#28377291 - 06/28/23 02:27 AM (1 year, 6 months ago) |
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I buy my parafilm off AliExpress. Although they only ship strips of 1-2 meters long instead of the whole thing at least to my country.
Edited by stroopwafelman (06/28/23 03:11 PM)
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Spirit-Crusher
DOOM HIPPIE


Registered: 04/24/19
Posts: 358
Loc: PNW
Last seen: 1 year, 4 days
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It’s probably old stock. Mine gets like that after a year or so.
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pablotx
pipette monkey


Registered: 05/06/23
Posts: 79
Loc: Hot & humid
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My parafilm (Amazon, couple years old) is hard to separate from the backing paper, along with the random cracking/snapping off when stretched just a bit. But, I've been using the stuff to wrap plates for over 30 years. Hard to break the habit.
Has anyone tried Petri Seal? https://www.rpicorp.com/products/laboratory-equipment/microbiology-accessories/petri-seal-blue-0-5-x108.html
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Mycolorado
Hobbyist


Registered: 07/23/16
Posts: 8,579
Loc: Interdimensional Bootcamp
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Re: Why is my parafilm garbage? [Re: pablotx] 1
#28377775 - 06/28/23 12:31 PM (1 year, 6 months ago) |
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My 6 year old roll in a semi arid environment still works perfectly.
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johnukguy
Learning



Registered: 06/23/22
Posts: 2,423
Loc: Colorado
Last seen: 1 year, 2 months
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Re: Why is my parafilm garbage? [Re: Arctic_Fox] 2
#28377826 - 06/28/23 01:14 PM (1 year, 6 months ago) |
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You can use cling wrap instead. It's also far less expensive.
-------------------- How to post pictures to shroomery TEK
Shroomery Trusted Cultivator And Member YouTube Channels.
“Evey Hammond: Who are you?
V: Who? Who is but the form following the function of what and what I am is a man in a mask.
Evey Hammond: Well I can see that.
V: Of course you can. I'm not questioning your powers of observation I'm merely remarking upon the paradox of asking a masked man who he is”
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CapSlinger


Registered: 05/17/11
Posts: 1,165
Loc: Colorado rocky mountain high
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Re: Why is my parafilm garbage? [Re: johnukguy] 1
#28377869 - 06/28/23 02:02 PM (1 year, 6 months ago) |
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Arctic_Fox
Mr. Furious


Registered: 03/13/23
Posts: 460
Loc: Ontario
Last seen: 4 days, 7 hours
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Quote:
Spirit-Crusher said: It’s probably old stock. Mine gets like that after a year or so.
How do you store it?
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Spirit-Crusher
DOOM HIPPIE


Registered: 04/24/19
Posts: 358
Loc: PNW
Last seen: 1 year, 4 days
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Re: Why is my parafilm garbage? [Re: Arctic_Fox] 1
#28378389 - 06/28/23 10:42 PM (1 year, 6 months ago) |
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On my work bench.
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Arctic_Fox
Mr. Furious


Registered: 03/13/23
Posts: 460
Loc: Ontario
Last seen: 4 days, 7 hours
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Re: Why is my parafilm garbage? [Re: Arctic_Fox]
#28378793 - 06/29/23 08:57 AM (1 year, 6 months ago) |
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I got some from a local lab supply, and it's much less jank
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