If you don't mind Lejunk I'll paste a little correction on the information here too:
There's still the confusion that I'll try once more correct: (no offense)
The reason people state that bicarbonate method is "ghetto version" of freebasing is because of the method, not because of the chemicals used.
People making freebase/crack with sodium bicarbonate generally make it by mixing bicarbonate powder with coke in spoon/glass and after that add the water.
Or they just add the bicarb. with coke+water in some ratio thought beforehand (ie. 3:1). If you add too much bicarbonate you can contaminate the final product with it. Or you just basify the other crap too.
The problem with this method versus the ammonia method is that one might add too much bicarbonate (or even too small amount) depending on the cocaine's purity. The correct method would be making it the same way as with ammonia: precipitating;
mixing the coke with small amount of water, then adding bicarbonate slowly until the coke starts to precipitate out of the water. Or the other junk before, if there exists such as lejunk mentions. With this method you can get the same results as with ammonia method. There's also a risk with ammonia to overshoot the pH, which destroys the cocaine alkaloid. With sodium bicarbonate such problem can't occur.
If one wants to, he can also extract this with ether, evaporate and perform water wash.
There just isn't any other reason or chemical explanation (or please provide me one) why ammonia would be better. Ammonia is no worse either.
The goo seen on the picture actually isn't any kind of amphetamine freebase, as the author of the picture states. Instead the author suspected that it is some sort of plant crap carried along the cocaine manufacturing process.
If I remember correctly, the starting material was already quite pure in percentages (60 ?).
If you aren't chemistry experienced, the final material isn't even 95%. Pure it is though.
To make that, one needs experience in the methods even though this process is just adding the ammonia.