Synthetisch filterpapier sticker 65 mm 0,3 μm PTFE filterschijf sterke zelfklevende patch voor gewone mond metselaar pot deksel paddestoelteelt (18st)

Ho utilizzato questi filtri per arieggiare i fari dell'auto dopo aver montato le lampade al led. L'ingombro della lampadina impediva di tappare il foro da 40mm del coperchio (che solitamente serve per passare i cavi per la centrallina dei xenon), così ho preso 3 piccioni con una fava, ho guadagnato un ricircolo d'aria dentro al faro, calore dissipato meglio e impossibilità all'acqua di entrare. L'adesivo tiene bene anche su plastica ruvida e sottoposto a calorePro:Buona capacità di filtraggio: L'adesivo in carta da filtro sintetica con disco filtrante in PTFE ha una porosità di 0,3 μm, che lo rende efficace per trattenere particelle e batteri.Facilità d'uso: L'adesivo è facile da applicare e rimuovere.Resistenza: Il disco filtrante in PTFE è resistente a temperature elevate e prodotti chimici.Versatile: L'adesivo può essere utilizzato per diverse applicazioni, tra cui la filtrazione di aria e gas.Contronessuno

I used these to filter some gas exchange ports in a high humidity environment and they are doing a great job. There is a noticeable amount of gas and humidity exchange in an a radius around each filter. The adhesive is strong and bonded well with plastic. There is a circle cutout on the throw away backing that is probably useful for sanitizing the “clean side” of the filter prior to application, otherwise I don’t know why they’d go through the trouble to cut holes in it.

In homebrewing beer, it’s quite usual to prepare a yeast starter prior to addition to the wort. Yeast starters are prepared in a 1 to 2-liter vessel by adding a packet or vial of purchased yeast (or bottle dregs) to enough wort to half fill the vessel. The starter is left for one or two days, normally with stirring, for the quantity of yeast to build up enough to give a good final fermentation. It’s quite common to leave the starter exposed to ambient air to help promote yeast growth. While it is important to let the air reach the starter, letting bacteria and other microbes in is not good as there will be a real risk of infection that could ruin an otherwise award-winning beer. To keep bacteria out, a cotton wool plug, a small sponge or a piece of aluminum foil can be applied to the mouth of the vessel. While these all help, they are not perfect and it’s still possible for bacteria to find a way in – particularly if the yeast in the starter has finished its job.I saw these PTFE patches on Amazon designed to protect the sanitation of mushrooms in Mason jars. I didn’t know people grew mushrooms in Mason jars before. Anyway, I quite often make beer starters in Mason jars, so I thought these patches might be ideal for this purpose.The product includes 18 permeable PTFE (Teflon) patches with 0.3µm pores that won't allow the passage of bacteria. These patches are mounted on sheets of transparent plastic with a ring of strong adhesive around the edge of each. To use, they are simply peeled off and stuck onto the outside of the threaded metal ring that normally seals the lid against the rim of the Mason jar. This is where I had an issue – it is normally the disk-shaped lid that seals in the contents of the Mason jar. When this lid is removed (as when using these patches), there is no longer a good seal between the metal ring and the jar, and so although the membrane will filter the air diffusing through it, air containing microbes could go around the ring and into the jar. Another potential problem is that the inner surface of the ring can rust which is not a problem if a inner disk lid is used but may release bits of rust or bacteria otherwise. A quick search of Amazon revealed that silicone seals can be purchased for Mason jars that would then offer full protection.I like that these PTFE membrane patches can be boiled/autoclaved and, presumably, treated with sanitizing agents like StarSan allowing re-use.It’s difficult to test their efficacy without access to a microbiology lab but they seemed to do a good job.I don’t know if anyone else has tried using these patches for preparing beer starters – but they appeared to work for me.

I am a novice when it comes to growing mushrooms. I’ve purchased, and have successfully grown, a few different mushroom windowsill kits here on Amazon. Researching a little further online, hi I hope to have a much better set up in the future. Purchasing affordable supplies as I come across them to stock up and have on hand when I eventually move to a future home. The papers appear to be well-made and sturdy, do not appear to rip easily, great quantity for the amount paid. Happy with my purchase and will need to follow up at a much later date once I have successfully used them.

Used this for a way for gas buildup to escape the jars while keepimg debre out.I used these as filters for my gold refining projects, the acids off gas quite a bit. Added these to let the gas out and prevent pressure build up inside the jars.I plan to use them (new ones) as a sour dough culture lid for the same reasons as my gold refining prohect.So many good uses for this product.