https://www.youtube.com/watch?v=febRrppZaSs

You will need:

1x Plant Material

1x Oven set somewhere around 100 C to dry your material (or a hot sun and lots of time) (be sure to vent every 15-30 mins to let vapor out)

1x Blender (Over 1200 watts is preferable - See Vitamix or Blendtec - Check your cities second hand goods website)

1x Coffee Grinder (the kind with blades)

1x Flour Sieve (To separate unpowdered from powdered and then re-powder unpowdered material)

Would you soak your bark 1st then freeze & thaw 3 times first?
I could be wrong but was that blender the bloke was using made of plastic? Cause you wouldn't want bits of plastic scratching off into your powder.

Nice link

Every time I tried that, the trapped water would melt after a couple of minutes and render the blending material unblendable due to its water content. Eliminating water completely makes for easy blending.

What really is harmful about smoking a little plastic? I don't think plastic is going to come off unless your using sharp things like metals or glass but plant matter? Probably not.

I agree with the second part.

What is harmful about breathing plastic fumes?

The effects of fumes from the thermal degradation of polyethylene on health.

Thermal degradation events as health hazards: particle vs gas phase effects, mechanistic studies with particles.

Inhaled cellulosic and plastic fibers found in human lung tissue.

The first link demonstrates the immediate effects of chronic exposure, admittedly not what we are talking about. The second purports that the fibers can remain intact when the fumes are a gas, and the third links those very fibers to lung cancer.

But that probably won't happen in these small amounts and with the action you are discussing.

Still not something I want anywhere in my mentals when I am delving deep into my mental.