The classic writing boards are divided in 2 categories, the marker boards and the chalkboards.
Starting from the marker boards types encountered are porcelain boards, which are usually confined by aluminum and on the backside of the board placed a metal sheet for more strength during the time and we avoid also the warping. Sometimes to reduce the cost could be placed hardboard on the backside of the board but this decreases dramatically the resistance of the board.
We must be always careful when choosing the boards, a porcelain board is always magnetic also but a magnetic board could not be porcelain also.
The writing surface is from porcelain. Usually the resistance under normal conditions is 20-25 years.
Another category is the enamel table, this table has a margin of aluminum and a metal sheet in the back for the reasons that we mentioned above, but the writing surface is from Formica, which is gloss.
Table enamel has always more glance from the porcelain board.
It is more sensitive in scratches and should always be careful to keep clean the board.
The best way is once a month cleaning-solvent liquid to cloth or paper to clean around the table that it returns to its normal state and not with sponges or other materials with rough surfaces which would define the board and the results will not be as we want.
Usually the resistance under normal conditions, it is 5-10 years.
Finally there is the matter of painted metal sheet.
In this case the piece of metal painted in white color material so we can write the surface. This board is also magnetic but the resistance decreases dramatically if the surface gets scratched.
Usually the duration under normal conditions, it is about 5 years.
The markers that we use should be specific for white boards otherwise it will create problem to the surface of the board.
Marker boards are produced in various dimensions for ex. from 120 cm - 250 or 300 cm length and the height may be from an 80 or 90 - 120 cm the above dimensions that listed are for purely business-educational areas.
We wrote about the marker boards, now let's move on chalkboards.
The boards are divided on chalkboards and porcelain chalkboards.
The porcelain chalkboards are made such as porcelain marker boards with the difference that the writing surface is more rugged and in various colors. Usually we meet them in green and blue color.
The porcelain chalkboard is magnetic
Usually the resistance under normal conditions, is 20-25 years.
The gloss chalkboard is made rounded from wood and the writing surface from plywood colored usually in green color.
The resistance and always under natural conditions, is 10-15 years.
Regarding the chalk would be better to use plastic chalks to have the least possible dust in place around the table.
There are also boards flip chart types where we can add the paper to make presentations and writing with a marker also.
In the end there are also the announcement boards that devided in fabric announcement boards and in cork announcement boards.
Your choices are on the left side of the screen.