Why are blackboards actually green?
Remember those good old school days, the first thing that comes to mind is our classes and seats, where we spend most of our day sitting around to receive various kinds of knowledge. From old school friends to books and pens, and certainly, the green blackboard. Have you ever wondered why most of the chalkboards are green?
Historically, blackboards were black in the past. Before the large blackboard existed, students used their own small plates made of painted wooden panels in the late 18th century, according to Concordia University. These black plates were the beginning of 'creating' the larger blackboard that we're familiar with.
Large-sized paintings were in the early 1800s when a Scottish school principal named James Pillans wanted his students to draw maps. But the students found it very difficult to map on small plates, so Billans came up with a genius idea by assembling a handful of small panels together and creating a huge one. This solved the problem!
From here, the idea quickly began, and by 1815, the blackboard space was large enough to be the size of a wall. Because of its importance, large pieces of blackboards were shipped to American and European schools by 1840.
Until that moment, the blackboard was black. But the change in color occurred in the 1960s. The board is coated with green ceramic enamel instead of the black cover. In addition, ceramic enamels were less expensive and less fragile than previous panels, and were lighter and more durable for long periods of time and bear difficult shipping conditions.
In addition, the green was more durable to write with chalk and was easier to clean than the blackboards, leaving no white spots of chalk effect. From here, the whiteboard has become a major part of the classroom.
Many advanced schools are using smart panels based on a computer screen instead of using traditional methods of education. those who deny the value of green blackboards in creating a generation with a great deal of awareness and learning. How about you? Do you prefer blackboards or whiteboards?
Picture Credit: All taken from © pixabay.com
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I had no idea.....
Fascinating post!!
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