There are different types of red brick i.e. Based on manufacturing method and shape of brick. They are commonly used since these are economical & easily available.
Brick - Wikipedia
PDF) Manufacturing of Bricks in the Past, in the Present and in the Future: A state of the Art Review
How Bricks Are Made
Bricks and the Industrial Revolution - by Brian Potter
Classification of Bricks
Why Bricks should be Soaked in Water before it is Used in Construction?
Brick Test: How to Check the Quality of Bricks?
Brick Selection Guide: Types of Bricks for Construction
AAC Blocks Vs Red Bricks, PDF, Brick
AAC Blocks Vs Red Bricks, PDF, Brick
Why Bricks should be Soaked in Water before it is Used in Construction?