http://www.bluelight.ru/vb/showthread.php?threadid=108820&r=50
this thread is in the Cannabis Discussion Directory. its the third sticky in this board.
The Ultimate Cannabis Grading Scale shall consist of two ratings: a letter rating from A to F and a number rating from 1 to 6. The letter rating is used to describe the objective physical characteristics of the cannbis to be rated, while the number is a subjective rating of its effects.
Please use the following scale as a guideline when determining the letter rating:
A - green, lots of trichomes. no seeds, excellent taste/smell/burn. This is connoisseur type stuff.
B - green with very few seeds, if any. ok taste/smell. decent amount of trichomes
C - dark green buds with very few seeds (if any) and small stems. tastes/smells bad and is all dried out.. possibly few trichomes
D - dark green seedy stemmy buds.
E - green/brown seedy stemmy nasty buds
F - dirt brown seedy stemmy nasty powder
The number rating is a scale from one to six, with one being the best and 6 being the worst. Only really good cannabis should get a number score of 1, and only really poor cannabis should get a 6.
Cannabis with a rating of A1 is excellent cannabis, while F6 is really bad cannabis.
Please try to use this scale when referring to the quality of pot in Cannabis Discussion to avoid the confusion common with slang terms.