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OfflineArctic_Fox
Mr. Furious
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Registered: 03/13/23
Posts: 460
Loc: Ontario Flag
Last seen: 4 days, 7 hours
Why is my parafilm garbage?
    #28377098 - 06/27/23 08:50 PM (1 year, 6 months ago)

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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InvisibleYuggoth
Mi-Go Cultivator
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Registered: 03/04/23
Posts: 558
Loc: Lost Carcosa
Re: Why is my parafilm garbage? [Re: Arctic_Fox] * 2
    #28377139 - 06/27/23 09:33 PM (1 year, 6 months ago)

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.


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OfflineArctic_Fox
Mr. Furious
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Registered: 03/13/23
Posts: 460
Loc: Ontario Flag
Last seen: 4 days, 7 hours
Re: Why is my parafilm garbage? [Re: Yuggoth]
    #28377184 - 06/27/23 10:58 PM (1 year, 6 months ago)

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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Invisiblestroopwafelman
I'm a teapot

Registered: 03/21/23
Posts: 386
Re: Why is my parafilm garbage? [Re: Arctic_Fox]
    #28377291 - 06/28/23 02:27 AM (1 year, 6 months ago)

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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OfflineSpirit-Crusher
DOOM HIPPIE


Registered: 04/24/19
Posts: 358
Loc: PNW
Last seen: 1 year, 4 days
Re: Why is my parafilm garbage? [Re: stroopwafelman]
    #28377739 - 06/28/23 12:07 PM (1 year, 6 months ago)

It’s probably old stock. Mine gets like that after a year or so.

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Invisiblepablotx
pipette monkey


Registered: 05/06/23
Posts: 79
Loc: Hot & humid
Re: Why is my parafilm garbage? [Re: Spirit-Crusher]
    #28377771 - 06/28/23 12:27 PM (1 year, 6 months ago)

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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InvisibleMycolorado
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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)

My 6 year old roll in a semi arid environment still works perfectly.

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Offlinejohnukguy
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Registered: 06/23/22
Posts: 2,423
Loc: Colorado Flag
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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)

You can use cling wrap instead. It's also far less expensive.


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InvisibleCapSlinger
Male

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

:whathesaid::snoopyes:

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OfflineArctic_Fox
Mr. Furious
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Registered: 03/13/23
Posts: 460
Loc: Ontario Flag
Last seen: 4 days, 7 hours
Re: Why is my parafilm garbage? [Re: Spirit-Crusher]
    #28378195 - 06/28/23 08:07 PM (1 year, 6 months ago)

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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OfflineSpirit-Crusher
DOOM HIPPIE


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

On my work bench.

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OfflineArctic_Fox
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Registered: 03/13/23
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Loc: Ontario Flag
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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)

I got some from a local lab supply, and it's much less jank :thumbup:


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