so if one used, lets say, 100ml per 100g bark, pre
evaporating till a third of original volume is recommended). when doing this without pre evaporating,and just pulling 50 percent of the nap out of the 100ml per 100g bark
and putting it in the freezer is that ok to do?
or should I pull all 100ml out without touching the black sluge and not getting any air bubbles? and do
I have to purify it
after crystals form?
or is it ok to go ahead and light it up after it forms, and drys? I dont understand the part of third and original volume ,or the definition of pre evaporation or concept.If-someone could explain I would be very grateful thanks.

I am going to tell you how I would do it my friend.

for 100g of bark I would use around 100ml of naphtha. I would do 4 pulls and that wash them with sodium carbonate. than I would use epsom salt to dry it. After that I would put it all in freezer for at least 17hours 24 better and than woala you will find nice, clean dmt in it ready to be filtered and dried.

(some people separate first pull from the other pulls and do freeze precipitation separately to get cleaner spice) Its up to you but if you decide to wash it with sodium carbonate I guess you do not need to separate the pulls.

also one more advise : when you put naphtha into the lye, bark, water solution do not shake it too much just roll the bottle or what ever you use gently and let the naphtha completely separate from the solution. than pull it out and repeat another 3 more times.

that is how I would do it my self.

good luck

when doing naphtha pulls its actually better to have less then more solvent i find, so 100ml should be just about perfect. what i do is what u said - pull about 50% of the naphtha put it into a jar for a few minutes to let anything minor settle. then you should be able to easily dump it all into a second jar while all the crap sticks to the bottom of the first jar. freeze it for a bunch of hours. then pull the other 50% into the first jar (no need to clean jars between pulls), dump the second jar of naphtha back into your slurry without dumping the crystals back in. then you can transfer your naphtha from your first jar into your dmt containing one and freeze it, and so on.......once you think you've got all of the spice out add a small amount of clean naphtha to your spice containing jar, maybe 30-50 ml's, put it in a bit of boiled water for 5 mins without agitating then dump it into your evap tray. your spice should be clean enough but you could always scrape it up and do another heat bath using a shot glass instead, you will probably find that more goop falls out