However, the recommended humidity level is between 30% and 50%. During the winter months, humidity levels are low (sometimes very low). However, these levels skyrocket during the summer months. The high humidity during the summer reduces the rate of evaporation of moisture from our bodies.
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1 Introduction. The substances known as rubber|natural rubber, gutta-percha, and various synthetic. compounds|are amorphous solids composed of long polymers.1 They vary somewhat. in chemical composition, melting point, and so on; however, they have the same elastic. properties, and for our purposes the distinctions between various kinds of rubber.