yup. I wouldn't use naphtha with anything rubber. ptfe, glass, and stainless.

I didnt like the sound of the rubber seal on the mason jars i used for freeze precip. either.

instead i substituted the lib (with rubber seal) for a piece of double (tripled??)... folded up piece of tin foil ... witht he lid screwed on tightly.. freezer never stinks.. though im not sure if this is betetr than the rubber seal or not?

benzyme.. do you foresee any problems using a tinfoil "lid" for freeze precipitations?

Thanks

you should grab yourself a 1 litre HDPE jug from ipa alcohol, it is really safe and has a snug child proof cap that dosen't leak at all. This way you can store it beside a heater or hot water if you feel the need, just make sure you vent it when it expands.

from everything thats been posted, i dont think hdpe is safe, if if it corrodes in months, its corroding immediately, just not noticeably.

nope.



exactly. you may not be able to detect it, but a mass spec would. it would show a pattern of repeating units in the mid-high range (in an ion-trap mass spec)

so then what is safest method of lye mixing and freeze evap when using a mason jar?

not sure if this is the safest but let me take a go..

in a separate container.. say a Pyrex measuring cup (works for me) or a separate mason jar in this case, slowly add lye to water. stir. let cool. add to your bark water in your other mason jar after cooling.. perform extraction and as has been noted in this thread dont store your base soup there.. for etching reasons or what have you

and assuming you meant freeze precipitation, not evap.. put your pulls into mason jars(i use wide mouth 250 ml), replacing the lid with tinfoil (i fold it over on its self a few times to avoid ripping when the ring is put on), screwing ring on tight.. this avoids using any plastic and the lid which has a rubber band on it .. and is still seemingly air tight as the freezer never stinks

again not sure if that is the safest but it works for me, im sure others will have some valuable input to help as well

awesome thank you much do you think i could stir lye, water, and bark in a pyrex measuring cup let it cool THEN pour that solutioninto a mason jar then add naptha and do you pull? i prolly sound really stupid by now im just making sure i do everything one hundred percent safe beeen really spooked about glass breaking on me

do you think you could do all mixing in measuring cup including the naptha pull, maybe you add napthha to the measuring cup and mix the combo of water bark and naptha in the pyrex cup and it would seperate and you could do all but freeze evap in measuring cup. this is all theoretical asking if it would really work

Measuring cup made of what material? If its plastic, we go back to the issue mentioned in the link house gave, about phthalates and plastic monomers possibly in your final product.

Why not mixing in a glass container? With your goggles and gloves on, put it in a tall glass container and use a long stainless steel or wood (without ink/finish) to stir in round motion. Raise speed gradually to prevent spilling and emulsions.

If your worries is lye breaking glass, it wont happen so fast. Most of the events when people have their glass breaking, I think, is because they add a lot of lye and dont mix it as they add, so a big quantity of lye sits on the bottom of the container and it generates heat and this is what breaks the glass. So add gradually while stirring well, and you shouldnt have a problem. Dont store your strong lye solutions in glass for several weeks unless its strong lab glass, and preferably work in a sink or bathtub so any spill doesnt ruin anything.

Im not sure if that would pose a problem or not, just always read to let it cool before adding to bark mixture.. and if you do it all in one container ti would not have the chance to cool

besides if doing a stb, depending on the size, that would have to be one giant Pyrex measures cup to fit all the water you need lol...

and if you spill during transfer there goes some bark solution..

why not prepare bark and water solution in mason jar, less the water you plan on dissolving lye in. then separately prepare basic solution in a mason jar or pyrex cup, once cool add to your bark solution..

always remember to take the necessary precautions when handling such basic materials (gloves, glasses/goggles etc and it doesnt hurt to have some vinegar around to neutralize a spill, just in case), especially if the aim here is for safety

for the record endlessness i was talking about using a glass measuring pyrex to be exact you think you could get a succeful pull out of aglass pyrex container as long as you mix properly?

Sure, glass is the way to go IMO. The only variable there that makes a difference is how thin/wide is the container. If its too wide, then the top solvent layer will be very thin, so it will be hard pulling anything without pulling the bottom acqueous. If its too thin, you will need to work harder to make both layers mix properly, but it will be easier for separation. You can always do a test run with some water and cooking oil, trying to separate both in the container you plan on using, to see if it will work well.

cool what do you normally use? like what would be the best one all around?

container wise

So all the A/B extractions I've done with HDPE 2 milk jugs have been tainted?! I haven't noticed any differences, but if you guys are saying its not healthy, then I guess I'll have to go back to using glass. I liked using milk jugs for various reasons though, but it's better to be safe than sorry.

Bongin, I use a glass container of appropriate size... By the way you can use the edit button if you feel you missed asking something in your last post, instead of makign a new one

DoingKermit, I dont think that FOR SURE all extractions done with HDPE container will be tainted, but they might be.. And since very few people have access to analytical equipment to see if their batch is safe, I think its better go for prudency, and be safe, no?

You can still use HDPE if you think its much better, but if you do, I think better make your spice as fumarate and wash with cold dry acetone or IPA, to remove potential traces of plastic.

is this class container you use easily bought at a store?? or easily accesible please let me know. actually i would care to know just for reference

mason jars are at the grocery store around these parts ... can get them in 1 L size, whole case of 12 for ~ 20 bucks..

try a surplus store for labware..

not that its recommended but apple cider comes in gallon sized jugs at the grocery store too, its not pyrex but taking some precautions has always worked (dont add lye directly, let solution cool first, dont have water bath too hot, dont store base solution here, etc )... has not broken yet through numerous trials.. only 8 bucks and you get something to drink while you work. and can be replaced occasionally for next to nothing

thank you much!!