From Business: Florence Elementary School, a part of Boone County School District, is located in Florence, Ky. It enrolls more than 550 students in grades kindergarten through fâ¦.
protective coloration. (zoology). A color pattern that blends with the environment and increases the animal's probability of survival.
The protective shade numbers refer to the darkness shade of safety glasses or welding shields, the higher the number the darker the glass. ANSI and the American Welding Society (AWS) publish a slightly more detailed chart, in ANSI Z49.1:2005 Safety in Welding, Cutting, and Allied Processes. In both cases, the recommendations offer the rule of thumb to âstart with a shade that is too dark to see the weld zone.