Qualities of Good Brick:

(i)                  Bricks should be table moulded, well burnt in kilns, copper coloured, free from cracks and with sharp and square edges.

(ii)                Bricks should be uniform shape and should be of standard size.

(iii)              Bricks should give clear ringing sound when struck each other.

(iv)              Bricks when broken should show a bright homogeneous and compact structure free from voids.

(v)                Bricks should not absorb water more than 20 percent by weight for first class bricks and 22 percent by weight for second class bricks, when soaked in coldwater for a period of 24 hours.

(vi)              Bricks should be sufficiently hard no impression, should be left on brick surface, when it is scratched with finger nail.

(vii)            Bricks should be low thermal conductivity and they should be sound proof.

(viii)          Bricks should not break when dropped flat on hard ground from a height of about one meter.

(ix)              Bricks, when soaked in water for 24hours, should not show deposits of white salts when allowed to dry in shade.

(x)                No brick should have crushing strength below 55kg/cm2