I guess there isnt any, but in my experience, there is no noticable difference from different blends of changa and pure DMT, atleast not to me, unless there is salvia divinorum in the changa, which there often is, people cut their changa with salvia and pass it off as the real thing, atleast here in scandinavia, when i get that type of blend there is a major difference, but from one herbal mix to another its more or less the same, to the degree dmt trips can be the same
Copper has been used and cherished for around 9,000 years. Pots that are made of copper are ideal heat conductors; the material is durable, hygienic and corrosion-resistant. Above all, it is the excellent heat conductivity that makes copper a perfect base material for pots and pans.
History of Copper and Brass in Ancient Egypt. Brass is actually an alloy of copper and zinc (tin). When the two metals are alloyed there is a high increase in hardness and sharpness of the metal. The melting temperature is 1,005 C (copper alone is 1,083 C). Copper was the most common metal for everyday use in ancient Egypt. Egyptian copper was especially hard because of its natural content of arsenic. The material was probably first worked during the Neolithic period (6th millennium BC).