i manage to only get larg yeilds if the solvent has some MHRB contamination making it yellow. and when i have completley pure white dmt i cant much of anything. i notice quite a big difference. can any one clarify?

Yellow to white is fine. If you like it white then clean it.
If you want more info then at the top right of this page there is a search button.
Research is the best method and can make you proud you did it yourself.
Asking questions is nice, but the folks at nexus helped us by writing valuable info in this forum and wiki.
Please use it first. Then come on here saying you searched high and low and couldnt find it, and someone will help.
But just making new threads about every question will piss people off, because they worked so hard at making the info clear here on this website!

Best of luck!

i did do alot of research on the wiki and forum and FAQ but i couldent find any info i could really use so thats why im here.

I have gotten consistently good yields of pure white Spice using q21q21's naphtha TEK. Using not-so-great jurema the yields have been at least .6-.7%, with Pedro's bark at least 1%+. What sort of TEK are you using?

By the way, I have gotten basically identical effects from yellow Spice as white. It's just extra oils and junk. You can clean up the crystals pretty easily, if so inclined!

im using nomans tek

Post us a pic! Best way is with a visual

i shall try.