Product description:
This set presents main sources of coal and products of its processing. Small fragments of fossil coal embedded in the plexiglass, such as: lignite, hard coal, anthracite and samples of materials which can be formed by them during pyrolysis or chemical treatment processes (gas, carbon fiber, coke, ammonia, naphthalene, fertilizers, pesticides, drugs, dyes and which is often added in the production of rubber as an ingredient that reduces its hardness in the vulcanized state). dim. of the plexiglass: 18 x 3,5 x 2,5cm
Weight: 0.80 Kg