So I am getting ready to run the dmt handbook tek and am wondering if anyone knows why it says .4-.5 is an average yield and the .67% achieved was a high one? I read reports all over claiming 1% as average and up to 2.5% as possible with good bark. Is this not a good tek anymore? Would I be better off with a different one? Am planning to use the same amounts as described in the handbook to the letter. Thanks in advance for any help
I should ad that I have done a few stb runs with smaller amounts so it's not my first rodeo. Also using mhrb powder from mexico. Thanks again.

you can't mention sources outside of supplier discussion
and even then that only applies to live botanicals (including seeds) not dried.
if you had attitude section thoroughly before making your first post, you would already have known this.

in answer to your question, yes 1% is a good goal to aim for with mhrb. >2% has been reported, though it is speculated that comes from mimosa ophthalmocentra (that is mis-labeled by vendors) rather than mimosa hostilis (afaik its still very much up in the air).
so aim for 1%, and if 2% comes along, well that's just dandy. if max yield is your goal, i would recommend using an aromatic solvent over an aliphatic (you can use an aliphatic to clean up the extract, though)

as for teks, the ONLY ones i advocate using, are the ones found in the wiki (at least until you understand what you are doing)

I did see where it said no sourcing but took that as "you don't ask for sources" not necessarily not to mention a source used. Will edit it right now either way. Thanks a ton for your input. Also I am very well aware of what I am doing just wondered why the "handbook" would achieve and suggest such low yields.

i meant until you understand what you are doing enough to the point where you don't need to use a tek.

didn't mean to imply anything.

No worries I don't offend easily lol. Text doesn't show emotion and I feel it's a horrible way to communicate but it's our only option with this topic lol. I am grateful for you response.

The handbook is quite old now [2008]...Things have moved on since back in the day. {See}
2%-2.5% is fairly common now with new tek advances. Although that may be the limit of what is available in potent bark.
Brazilian seems to be a little more potent than Mexican but there are many variables as to how much one particular bark will hold.

Acacias are somewhat lower in content...1%ish (+NMT)

Thanks for the info Cyb. What kind of conversion should I use to do a bigger extraction? Say a kg or 2 at a time? Should I just scale everything up at the same rate as the bark? Any info would sure be helpful. I think I am going to try your first tek. Don't think I will have time to do the freeze and thaw steps or to let the acid step set for 8 hours so the max-ion is out for now. Only have 1 day to perform the extraction and then a couple days to freeze percip or evaporate.

Please see Here
No you do Not scale up...that's not how it works.

One day to do it? Why?

2kg is a potential 40g of spice...that is ridiculous. No one person needs that much, even if sharing. This amount smacks of selling and I won't help in that regard.

I do understand your concerns. The amount is so high because that's what the handbook from the wiki calls for. Also there is a group of 4 people ,that I am not one of, and they all like to share in small groups. With the difficulty level that has come about at obtaining mhrb these people are planning to do this one time and hope it splits up 4 ways with each person having a nice sized supply. 1 pwim did the ordering another has the know how and one of the others has a location. Fourth guy is just a good friend of all 4. So they all figured out a day to go spend at the location together to do both kg at once to minimize risk factors. Never considered 40 a possibility when setting this all up. Thought 20 would be max and that's only 5 ea. Thanks a ton.

Also the handbook calls for 2kg so in no way am I breaking the attitude rules. Swim ordered what the wiki tek called for. Am not a dealer or a commercial extractor lol. Again I do see your concern but it's unwarranted. Thanks again

Oh yeah and if everyone is sooooo against large batches then someone should take the dmt handbook off the wiki. That's the whole reason My foaf ordered 2 kg to begin with. Thanks again

Hehe, I did the exact same thing when I started out. The reason its still up is because its an awesome reference.

Anyway, I started with vovins and 100g. When you get into larger quantities of bark, you need large containers, more time, ect. So starting off small is good. It keeps it simple so you can really get a feel and understanding for what's going on.

Plus, if you botch a 2kg or 1kg extraction, that's a real bummer. On my first go, I did 1 naphtha pull then accidentally broke the jar the MHRB soup was in. Luckily I had one pull done.

Best of luck.