I went through 10 pages of post for the max ion tech and only saw 1 comment mentioning 200g bark but it was never answered.

Is there a rule of thumb for increasing the quantity of all other parts once the mhrb is multiplied?

Thanks

I'd say multiply everything with the same factor except for the solvent (keep that ca. the same).

Do you have a pH meter? Vinegar and lye were the ones I really didn't need to increase proportionally. Especially with as hard as it is to get lye in my parts its not something I am keen to waste. The amounts listed on the tek are good when following the amounts of the tek, but otherwise knowing you have it sufficiently acidic or alkaline at different parts is the important part.

Increase will be volumetric. One way you can go about it is by seeing the volume difference between 100g and 200g and then just adjust everything else based on that volume change.

Your extraction will be more efficient and effective using less bark also.

One love

Not really the answer you are looking for but in my brief experience I'd suggest sticking to the listed recipe. 50g mhrb will get you such a decent yield that it seems pointless to scale the operation up for personal use.

Tl/dr: I dont know.

Scaling up rapidly becomes cumbersome and the both the likelihood and the consequences of errors or accidents become magnified. For that reason it is strongly suggested that you stick to the amounts suggested. If you want more, repeat the entire extraction. A skillful person may be able to run several extractions concurrently and achieve some level of time saving.

Another problem with scaling up extractions is that surface area scales as the square whereas volume scales as the cube. The upshot is that difficulties in mixing tend to arise, leading to inefficiency in the extraction.