Hi, using a 6/1/1 Water/Lye/Bark STB extraction method with naptha and freeze precip. Initially I was getting over 1% but on a recent batch I'm only getting .25%. I bought 3Kg of bark and have been using the same batch the whole time. Does any one have any idea what could be going wrong? Haven't changed my procedure. Bad bark possibly?

Use more lye, also the amount of DMT varies in the bark, it isn't consistent. Also how did you get MHRB without customs officers seizing it if you live in Ireland?

It's not illegal as far as I know. Just ordered it and it arrived. Lately they've been focusing on the RC's market, banned a load of them last year. Bark is still ok here. Spores are as well...

the barks not illegal but customs seem to be siezing the big shipments for the suppliers that come from brazil. you can still order smaller amounts an they should make it through, i know if mine doesnt get here i will be demanding customs give it to me anyway.
where exactly did your get your bark from though? i just want to know cos ive ordered some aswell and want to see if its from the same supplier, i can then tell you when mine arrives if its any good or not assuming they are the same supply.

Can you post suppliers? mhrb co uk . They seemed to have suspended sales...

It's very cold here, so Ive put the last batch 400g, in some luke warm water and getting a little more. Still, looking like less than 2g, i.e. less than .5%. Not good...

yea suppliers are ok to post about, i think theres some rules but generally its ok. i got some from them to it was only a few weeks ago their mhrb is good stuff so should be ok. the last lot i had i was getting decent yields. you should use hot water to boil the mhrb in and then and then use warm naptha to get higher yields but depending on how light or heavy the naptha is will depend on how much you want to heat it.
the basic tek i follow for 100g is this

100g powdered MHRB
60g NaOH
300ml naptha
Hotplate/hob
Large non-aluminium saucepan
Narrow glasses or bottles
Large pipettes or separation funnel
Measuring bowls
Time, patience and rudimentary chemistry knowledge
Water bath (recommended)
Ammonia (optional)

Measure out 100g powdered MHRB.
Boil 1 litre of water and add it to the MHRB while stirring for five minutes.
Leave to cool.

Measure out 60g of NaOH
Slowly add NaOH to water until it has all dissolved to make a saturated solution.
Make sure it doesn't get too hot.
Gradually add the NaOH solution to the bark solution. You should see freebase DMT tumble out of solution.
By the time you've added about half the NaOH solution, the mixture should have turned black-brown and you can no longer see the precipitate. Continue to add the rest of it.
Heat the mixture while stirring in a water bath. Keep it at about 50-60°C

Meanwhile, measure out about 100 ml of naptha.
Tip the naptha into the hot mixture and mix vigorously for at least 20 minutes.
Keeping it warm, leave the layers to settle and separate for an hour.
Tap off the top naptha layer into a narrow drinking glass and use a small pipette to suck off the yellowly-colourless naptha layer and put in a separate glass. Be sure not to suck up any of the horrible black NaOH mixture.
Repeat this with a fresh 100ml of naptha at least three times.

Pour the naptha into a shallow baking dish and leave in the freezer overnight on its coldest setting.
The next day DMT crystals should have formed on the dish.

Take the dish out of the freezer and quickly pour off the liquid naptha (filter it if you like) for reuse. Be careful to ensure the crystals remain in the dish.
Evaporate off the remaining liquid with a fan and collect and weigh your crystals.


i used this tek on wot should be the same bark as you and got around 1% for my first ever couple extractions.
it worked very well, but the last time i did it i changed to lighter naptha and ended up with dark orange/brown colour solvent and it pulled loads of gunk im sure it was due to too much heat so if you use light solvent then try to keep it around 35-40c the recc in this tek is around 50-60c
im gonna try an A/B tek next time as it seems like it will pull a cleaner product.
temp in a stb seems quit important and will influence wot yield and purity you get and best temp range can differ depending wot solvent your using, so ive found.
i only thought it might be temp related cos you said its very cold were you are and your using luke warm water.

Cool. I'm trying a hot water bath now on the bark and lye mix. Keeping it at about 45C at the moment. Going to keep warming it for another hour or so. Mix is 6/1/1 Water/Lye/Bark with 1200ml water. I was getting above one with my first pulls also - now I'm thinking it was beginners luck

yea 45c sounds good if your naphtha/solvent is heavy you can go up a lil to 50/60c but 45 sounds good, i add 100ml for a 100g ext of solvent then stir quit well for 20 mins let it seperate for 30mins -1hr, decant and repeat that 3 or 4 more times. with fresh solvent, i find it seperates in about 20 mins usually. make sure that when you add the solvent it stays warm and your stirring or mixing it it up for at least 20 mins (depending wot tek your using) then leave it for half hour or so. keep it all warm until the solvent has been decanted off and put in another dish then you can let it get cool. you should get more then. it doesnt matter if it cools a lil while decanting as long as it doesnt go too low or if its well saturated it will start to crash out before its been decanted. i do most of this in the same saucepan and just pour it into a smoothie maker(with tap) to seperate the solvent once its been mixed an left for another half hour.
good luck, let us know how it went.

Cool, this has been working better now alright. Close to .8. Thanks for the tips... I'll keep trying to perfect my technique...