hp of bug into nono no goo.
Pyrex is hands down easy as hell to work with, when it comes to dumb proof.
Teflon sheets are for the pro..
Hell yeah PTFE is a bitch at first. Gotta kinda learn the tricks, but once you do its so awesome to just pull the whole slab out in one shot. No scrapes or nothin. Straight into vac chamber for the muffin.
Heres some tips if anyone plans to pick it up.
First get some good clips. I use these:
Second, you NEED a hot plate. Normal hot water will not work well. Something about the teflon doesnt like to transfer heat so if you dont have a source constantly heating itself back up it will take FOREVER. That combined with it being a sheet of plastic so its not in full contact with the pyrex at all times. Makes first evap long and annoying.
To help fix that a little heres the last tip. Leave little bits of oil in the corners of your pyrex you plan to line with PTFE. Itll help hold it down and keep it pressed against the side walls. I was originally going to use a tape but was afraid it would react in the vac chamber so i decided not to. Luckily my dish wasnt cleaned yet like i usually do after runs so when i tossed it in it stuck 10x better.
Thats pretty much it. Make sure your vac chamber is big enough to handle your whole sheet. Vac ovens really work best but if you need to you can turn a round vac chamber sideways to get more area to pull the first muffin.
That was our main problem was wed have to low heat purge til we could fold the corners in and fit it into our round vac chamber.