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OfflineTom_Wronski
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argh... what a mess... the caps of my slant/tubes melted. PIC for lolz. * 1
    #26912895 - 09/01/20 10:02 PM (3 years, 4 months ago)

15 minutes in the pressure cooker melted the caps on the slants I was trying to make. Can someone point me in the direction of some slants/caps that will not melt. These ones said they could withstand PC temps, but maybe just the tubes? It's insane. Now I have to go clean this.



Edited by Tom_Wronski (09/01/20 10:20 PM)


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InvisibleThomsen
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Re: argh... what a mess... the caps of my slant/tubes melted. PIC for lolz. [Re: Tom_Wronski]
    #26912981 - 09/01/20 11:29 PM (3 years, 4 months ago)

You should go for slants (and caps) made of polypropylene.

Did your pc exceed 15 psi?


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OfflineMH5109
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Re: argh... what a mess... the caps of my slant/tubes melted. PIC for lolz. [Re: Thomsen]
    #26913008 - 09/02/20 12:09 AM (3 years, 4 months ago)

Ah fuck, I know that exact experience. Go into the work area and then get ready to open the sab up and set up a little 45° area for the slants to solidify on. And bam I opened the pc up and agar and slants were all kinda meshed together in the qt jar they were cooked in and that pretty much ruined my day lol. But live and learn I guess at least I didn't get agar all over the inside of my pc.


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OfflineTom_Wronski
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Re: argh... what a mess... the caps of my slant/tubes melted. PIC for lolz. [Re: Thomsen]
    #26913013 - 09/02/20 12:17 AM (3 years, 4 months ago)

It may have gone a little over. I tried to keep the temp low enough that the weight was barely moving or hissing. I looked at the specs for LDPE low density polyethylene and it seems like they aren't supposed tolerate pc temps.


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Invisiblealaskappalachian
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Re: argh... what a mess... the caps of my slant/tubes melted. PIC for lolz. [Re: Tom_Wronski]
    #26913093 - 09/02/20 02:39 AM (3 years, 4 months ago)

I got caught up but am going to try and backtrack through a couple posts and find some that were.  recommended a little while ago by a TC.  I need to buy some myself and looking through the Amazon listings tonight didn't yet yield any solid hits.  I see some that say autoclavable @ 15psi but in the reviews melted for 2/10 people and several that had PP tubes but shit caps.  I'll let you know if I find that recent post...


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OfflineMH5109
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Re: argh... what a mess... the caps of my slant/tubes melted. PIC for lolz. [Re: alaskappalachian]
    #26913098 - 09/02/20 03:03 AM (3 years, 4 months ago)

Thermo Fischer is a place I got my first  slants. Other scientific equipment sellers have them, typically in assorted sizes. Ebay as well is a good place for stuff like that.


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OfflineTom_Wronski
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Re: argh... what a mess... the caps of my slant/tubes melted. PIC for lolz. [Re: MH5109]
    #26913282 - 09/02/20 07:23 AM (3 years, 4 months ago)

Thanks. I will try those. These are 'falcon' and I am sure they all use LDPE and not HDPE or PP, but maybe I can give it a go with them or even find some higher quality caps since all the tubes and agar actually survived.

Quote:

MH5109 said:
Thermo Fischer is a place I got my first  slants. Other scientific equipment sellers have them, typically in assorted sizes. Ebay as well is a good place for stuff like that.




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OfflineA.k.aM
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Re: argh... what a mess... the caps of my slant/tubes melted. PIC for lolz. [Re: Tom_Wronski]
    #26913313 - 09/02/20 07:46 AM (3 years, 4 months ago)

I’m about to make some from cell treat centrifuge tubes later today so we’ll see if those work.

You can get 25 for free from the site.



Cap is hdpe, not sure what that is. Actually I just realized I don’t need to pc these I can just pour them like plates but I’ll throw one in just to see.

Just checked it out it says the caps can handle 220f so I wouldn’t go 15psi.


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Edited by A.k.a (09/02/20 07:50 AM)


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OfflineTom_Wronski
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Re: argh... what a mess... the caps of my slant/tubes melted. PIC for lolz. [Re: A.k.a]
    #26913371 - 09/02/20 08:42 AM (3 years, 4 months ago)

HDPE is high density polyethylene so should withstand higher temps than LDPE. I noticed the screw caps are all rated for slightly higher temps.


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Offlineconformity
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Re: argh... what a mess... the caps of my slant/tubes melted. PIC for lolz. [Re: A.k.a]
    #27080485 - 12/09/20 01:09 PM (3 years, 1 month ago)

Quote:

A.k.a said:
I’m about to make some from cell treat centrifuge tubes later today so we’ll see if those work.

You can get 25 for free from the site.



Cap is hdpe, not sure what that is. Actually I just realized I don’t need to pc these I can just pour them like plates but I’ll throw one in just to see.

Just checked it out it says the caps can uhandle 220f so I wouldn’t go 15psi.




id you ever try a PC cycle on these? I have a pack that I would rather no pour.


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OfflineA.k.aM
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Re: argh... what a mess... the caps of my slant/tubes melted. PIC for lolz. [Re: conformity]
    #27080721 - 12/09/20 03:47 PM (3 years, 1 month ago)

No not yet.

I’m pretty sure other people have though. The tubes should sterilize pretty easily compared to grains.


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