Bought some md crystrals recently and we tested them.
Marquis regeant:
Put a small sample in. Took a few seconds to change colour. Not sure if this beecause the sample was stuck at the top of the tube before it hit the bottom. Then pretty much turned black. I think there was the smallest hint of purple as well.
Mecke:
Then the mecke test was used. It first turned blueish/green then turning to black. After about 2 or so minutes the sides of the tube turned an olive green hinting oxycodone. But at the bottom of the tube it still raimed a blackish colour.
Here is a pic example for the mecke:
Marquis regeant:
Put a small sample in. Took a few seconds to change colour. Not sure if this beecause the sample was stuck at the top of the tube before it hit the bottom. Then pretty much turned black. I think there was the smallest hint of purple as well.
Mecke:
Then the mecke test was used. It first turned blueish/green then turning to black. After about 2 or so minutes the sides of the tube turned an olive green hinting oxycodone. But at the bottom of the tube it still raimed a blackish colour.
Here is a pic example for the mecke:
