18. Types of brick according to Quality
First Class Brick
Metallic Sound, Blood Red in Color. Regular Shape with good corner and edge
Second Class Brick
Metallic Sound, Blood Red in Color. Not regular Shape with good corner and
edge
Third Class Brick
Do not have Metallic Sound, Light Red in Color. Not regular Shape and corner
or edge
Over burnt Brick
Metallic Sound, Dark brown in Color. Twisted in Shape