Re: [DIYbio] Re: Screw cap petri dishes?

By the way, why do you want them to be tight seal? To avoid the agar to get dry during long term incubation? storage?
For storage, plastic wrap, parafilm or even scotch tape work fine. If the issue is long term culturing as I do, try to get 3M surgical tape, it has a good permeability for gases and helps to keep the moisture of the plates (parafilm is almost gas impermeable and slows down the growth).

As Gra says, they get quite slippery, not only from the fridge but also from the autoclave (unless it is one with dry cycle).

Also, keep in mind what bugs you will culture. You will need to scrap the agar from the plates to clean them.

El viernes, 18 de enero de 2013 14:41:27 UTC+11, John Griessen escribió:

On 01/17/2013 08:25 PM, Sebastian S. Cocioba wrote:
> Its not so much Sterility as it is waste production. It makes me feel crappy thinking of all the polystyrene waste a few
> experiments pile up. There must be a better way...

Sounds like you'd be happy with both halves made of PP.  The lid and the very short jar.
What if the sealing was done by a thick squishy gasket so that a rough 3DP
jar would do?  Then you might autoclave and reuse it, then promote to sell a high enough
volume to get them make of smooth PP from expensive injection molds.

Or just skip the injection molds and 3DP it with advancing smoothness as that progresses,
and get involved in the fight over 3DP with 3DS and Kickstarter and Formlabs 3D printing patent suit?