Лако-красочные материалы — производство

At one time, the school laboratories of industrial chemistry sought to train students to use the most primitive sorts of apparatus, put to­gether by themselves from the simplest parts. The modem viewpoint is to use not the simplest, but the most suitable, equipment — that which conserves time and effort. To be sure, the simpler of two equally serv­iceable apparatus should be given preference, and unnecessary compli­cations — the cost of which is out of proportion to their advantage — should be avoided. Nevertheless, it is still desirable for the technical chemist to be able to operate, in an emergency, with the simplest ma­terials. It is worthwhile, for example, for him to have some proficiency in glassblowing so that he can prepare simple equipment from glass tubing.