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josbos
Registered: 02/16/20 
Posts: 134
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alternative for petri dishes
#26987560 - 10/15/20 07:18 PM (3 years, 3 months ago) |
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Hi there,
i want to know if i can use ketchup cups as a alternative for petri dishes. because i have seen videos on YouTube. where by people use ketchup cups instead of petri dishes. do anyone know if ketchup cups come sterile?
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eatyualive
Eat's You Alive :)



Registered: 08/17/01
Posts: 19,026
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Re: alternative for petri dishes [Re: josbos] 2
#26987563 - 10/15/20 07:22 PM (3 years, 3 months ago) |
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Lookup mr aliens holy grail plates and pastywhytes easy agar.
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josbos
Registered: 02/16/20 
Posts: 134
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Re: alternative for petri dishes [Re: eatyualive]
#27018962 - 11/03/20 09:10 AM (3 years, 3 months ago) |
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ok, i looked those two up but still got some questions.
these are the cups that i got: (i placed a pen there for scale)

1. so i measure the ingredients than place them in a bowl and put hot boiling water to it and mix it right? (making agar)
2. than i pour a little layer of the liquid in those cups? (the cups are not sterilized)
3. than i wrap the top of the lid of those cups with foil and stack them inside my PC, i make sure the water inside the PC is not touching the cups be elevating the cups, and i sterilize them for 45 minutes at 12psi?
4. with Pastywhyte's Easy Agar Tek, he drills holes inside the lid of the cups, do i need to do that with my cups? (since my cups are a little bit different than the ones he uses)
5. i want to have the liquid colored blue, what product should i use? (can you give me a brand name)
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josbos
Registered: 02/16/20 
Posts: 134
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Re: alternative for petri dishes [Re: josbos]
#27018967 - 11/03/20 09:11 AM (3 years, 3 months ago) |
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ok, i looked those two up but still got some questions.
these are the cups that i got: (i placed a pen there for scale)

1. so i measure the ingredients than place them in a bowl and put hot boiling water to it and mix it right? (making agar)
2. than i pour the liquid in those cups? (the cups are not sterilized)
3. than i wrap the top of the lid of those cups with foil and stack them inside my PC, i make sure the water inside the PC is not touching the cups be elevating the cups, and i ster
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grownright
Duke of Lizzards



Registered: 10/06/14
Posts: 1,030
Loc: Deep South
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Re: alternative for petri dishes [Re: josbos]
#27019030 - 11/03/20 09:34 AM (3 years, 3 months ago) |
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I do not see those making it through a PC cycle. Like at all
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josbos
Registered: 02/16/20 
Posts: 134
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Re: alternative for petri dishes [Re: grownright]
#27019034 - 11/03/20 09:36 AM (3 years, 3 months ago) |
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they can be heated up to 118C/244,4F
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josbos
Registered: 02/16/20 
Posts: 134
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Re: alternative for petri dishes [Re: grownright]
#27019041 - 11/03/20 09:38 AM (3 years, 3 months ago) |
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These sauce and salad bowls are mainly used for tapenades, filet americain, egg salads and the like, but can also be used to store non-food products such as screws and nails. PP, or polypropylene, can withstand a temperature of up to 120 degrees Celsius and can be used in the oven as well as in the microwave.
Source: https://www.disposablediscounter.com/sauce-and-salad-container-rectangular-108mm-125cc
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A.k.a
Stranger



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Re: alternative for petri dishes [Re: josbos]
#27019056 - 11/03/20 09:48 AM (3 years, 3 months ago) |
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Those are pretty big.
I’ve seen quite a few people using the little circle ketchup things and just pouring them like regular plates.
As long as yours say 5 in the triangle on the bottom they should work in the pc.
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LAGM2020     
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josbos
Registered: 02/16/20 
Posts: 134
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Re: alternative for petri dishes [Re: A.k.a]
#27019083 - 11/03/20 10:15 AM (3 years, 3 months ago) |
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i just have a regular PC, so my PC is not big, i can place two side by side and stack them that way.

Of course i will use foil and such
what do you mean with: As long as yours say 5 in the triangle?
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PrincessRosalina
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Re: alternative for petri dishes [Re: josbos]
#27019185 - 11/03/20 11:28 AM (3 years, 3 months ago) |
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There would be a number 5 in the triangle on the bottom of the container. It means that it is a type of plastic that can be pressure cooked.
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josbos
Registered: 02/16/20 
Posts: 134
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Thanks for the reply! :-) , it got this logo:
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Smartattack
C'mon man



Registered: 12/21/18
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Re: alternative for petri dishes [Re: josbos]
#27019248 - 11/03/20 12:02 PM (3 years, 3 months ago) |
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The problem is, a lot of things are PP5 for the container itself but not the lid. So you'll end up with a layer of thermo formed plastic in your vessel after PC.
-------------------- * Smarts videos * Planet of the APES   I'm a fungal white supremacist.
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josbos
Registered: 02/16/20 
Posts: 134
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Re: alternative for petri dishes [Re: Smartattack]
#27019256 - 11/03/20 12:05 PM (3 years, 3 months ago) |
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ok, so can i use 70% iso instead of PC ?
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PrincessRosalina
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Re: alternative for petri dishes [Re: Smartattack]
#27019286 - 11/03/20 12:18 PM (3 years, 3 months ago) |
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Quote:
Smartattack said: The problem is, a lot of things are PP5 for the container itself but not the lid. So you'll end up with a layer of thermo formed plastic in your vessel after PC.
I forgot to state this as well.
no, you still need to PC things.
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josbos
Registered: 02/16/20 
Posts: 134
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but if i place those cups inside a PC i will get a layer of thermo formed plastic.
How can i sterilize those ketchup cups? any tips for me?
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coversall
إِنْ شَاءَ ٱللَهُ



Registered: 06/06/20
Posts: 2,749
Loc: संसार
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Re: alternative for petri dishes [Re: josbos]
#27019564 - 11/03/20 02:21 PM (3 years, 3 months ago) |
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I've used the same jars I did BRF cakes in for no pour agar.

Got pan cambos germing atm.
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josbos
Registered: 02/16/20 
Posts: 134
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Re: alternative for petri dishes [Re: coversall]
#27019570 - 11/03/20 02:23 PM (3 years, 3 months ago) |
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interesting
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coversall
إِنْ شَاءَ ٱللَهُ



Registered: 06/06/20
Posts: 2,749
Loc: संसार
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Re: alternative for petri dishes [Re: josbos]
#27019598 - 11/03/20 02:31 PM (3 years, 3 months ago) |
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Not the easiest things to work in, but they were there and free. More than ok for germing spores.
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A.k.a
Stranger



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Re: alternative for petri dishes [Re: coversall]
#27019642 - 11/03/20 02:54 PM (3 years, 3 months ago) |
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The ketchup cups come sterile in the bags I guess.
I’m almost out of plates so I’ll prob try them next just to see, plus there perfect size for dropping the whole puck into a jar.
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LAGM2020     
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coversall
إِنْ شَاءَ ٱللَهُ



Registered: 06/06/20
Posts: 2,749
Loc: संसार
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Re: alternative for petri dishes [Re: A.k.a]
#27019651 - 11/03/20 02:56 PM (3 years, 3 months ago) |
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Yeah I really wanted them to work, and some did.

But out of the different containers and agar teks I tried I found no-pouring in the sauce pots to be the least contam resistant. YMMV by all means. If you were in the uk I'd send you this box of 500 sauce pots I have for cheap!
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