| Home | Community | Message Board |
|
You are not signed in. |
This site includes paid links. Please support our sponsors.
|
|
Reged: 07/16/00 Posts: 5266 |
|
||
|
I mentioned microwaving plates with lots of condensation before, just for 5-10seconds, this remelts a spot of agar which will usually result in it mixing with the free/liquid water and then it will set leaving far less liquid water -if any. I now put something under my jars on one side so it is tilted to one side, I just now used a plastic pen lid. This tilting makes the liquid all gather in one side. Now when microwaved the microwaves appear to all go into that one spot where the water has gathered, and remelts only there first. If you do it flat it will randomly melt a small spot, probably where the water is gathered slightly more. After remelting and setting it leaves an uneven surface so I would prefer to have this at the side of a jar rather than a random spot(s) which might be in the middle. Quote: I am not sure if heating to high temps enlarges or shrinks the plastic, might depend on shape, I know my syringe plungers go looser over time, so not sure if the plunger gets wider or the black rubber is shrinking. Anyway it might be an experiment to try and overheat one of the items, i.e. the lid or the base. If the lid shrinks in high heat then it might snap onto the base better again. I supposed you could put a lid and base into the PC at the same time but not connected and heat at high heat, then test both out with your current base & lids and see if it does make a difference. Then you could heat the bulk of just your lids/bases purposely altering them to fit the bases/lids I have been using silicone grease on lids, not just for agar. The grease is like vaseline and does not dissolve or go runny at high temps, like silicone caulk/sealant but it never sets. If it is on the rim and base container then it will stick itself together and form a seal, and the caps will not easily fall off it touched against. As it is sticky I also believe it will help trap any contaminants, e.g. if you use unmodified lids on jars and just leave them loosely on then if any dust/spores try and get up under the lid it will hopefully have a harder time making it past the sticky surface. So I smear it onto the threads of glass jars and inside the cap at the sides. It would be an interesting experiment to get a few similar jars with loose lids and blow some spores around them, this need not be contaminant spores, you could just use spare shroom spores and just not bother to take much care collecting them (rather than purposely growing mold to get contaminant spores!). Now you can see if the non greased jars are more prone to contaminate. The scientist John Tyndall use to smear the walls of what was similar to a SAB with gylcerine to capture dust particles. But gylcerine should all liquefy and fall off it heated to our temps, as would vaseline. The best silicone grease I have used is dow molykote 111 but cheaper ones should be OK, the 111 is nice and thick. I have not tried it yet but the grease could be good enough to make a lid for a container you have which has no lid. I have gotten containers with PP bases but PC lids, so the lids are useless with heat, I have plenty of sheet PP available so these could be cut into lid shapes and smeared with grease. Of course some will just say just go buy them but some might be in countries where things are difficult to find, or do not like wastage.
|
| Extra information | ||||
|
15 members, 165 guests and 54 web crawlers are browsing this forum.
Moderator: Shroomism, george castanza, RogerRabbit, veggie, mushboy, fahtster, LogicaL Chaos, 13shrooms, Stipe-n Cap, Pastywhyte, bodhisatta, Tormato, Land Trout, A.k.a |
Forum Permissions
You cannot start new topics You cannot reply to topics HTML is disabled BBCode is enabled |
Rating:
Thread views: 793642 |
||
|
|
||||
