chalkboards
Black boards or boards as they are commonly called, have developed a teacher, it was not possible to solve long mathematical equations to board staff for each child. Some of the board was as simple as wooden boards painted with black sand, others are made of porcelain and imported from the United Kingdom. Finally, a blackboard-size slabs of slate have been sent around the growth of the American railroad.
Today’s boards are different types and sizes. Some examples of porcelain steel chalkboards chalkboards are magnetic boards, composition boards, freestanding reversible boards, display / menu boards, blackboards sidewalk A-Frame stand multi-task, lap panels, composite panels, music staff lined with blackboards, rendering lines and graphics cards. Blackboard frames are made of different materials such as oak, teak wood, plastic and aluminum, and usually green or black. Some are lined with felt so it can be used to steer the ship.
As of now, the use of lists gypsum was significantly reduced, probably due to the appearance of blank ballots are easy to use water soluble markers and are easy to use. In the case of a traditional blackboard, the government is properly seasoned with chalk and water and avoid the mixing of the surface, because it leads to a deterioration of the government. This is not necessary for the blank ballots and, therefore, they are convenient and very easy to use.
It is often called a blackboard, a high-quality panels are built on a rough version of the porcelain, and has the advantage that is durable and usually last between 10-15 years of intensive use. Chalk marks easy to remove with a sponge or a blackboard eraser.
These (plates) made of planks often keep wet marks made by chalk, because they are difficult to remove this type of material. One thing to consider in conjunction with other councils is that the panels generate dust and may be a problem for those who want a room full of electronic equipment.
Dry erase board
Also known as a board marker board or dry erase the dry erase board is usually a bright white surface that can be used with non-permanent markers.
Melamine, painted steel, painted hardwood laminate of aluminum and steel enamel is usually most types of materials used for dry erase surfaces
Cork Board
cork boards or bulletin boards are used mainly for people who want to announce things to buy and sell. They are also used to promote an event or information. Using materials of cork bulletin boards is to make it easy to add and delete messages from the Council.
Today, genuine original slates are pretty much obsolete, and they are a find for collectors. It is, however, that the billboard was the idea of a professor of geography at the beginning of 1800th it was used at West Point for many years before being replaced by the billboard now People.
The board is what you find in most schools today. Teachers and students, he prefers the blackboard, because it is clean – no lime in question. The markers used to write on the blackboard wipe gently with a cloth and comes in many colors.
Unfortunately, the age old boards are covered with porcelain skin over slate, slates are framed or mounted directly on the boards of age. These methods are used, due to the removal of old tiles can be a daunting task, not to mention an expensive undertaking. It is much easier to hide the old board and replace it with a new slate.
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