what is roughness of tablet coating ,logo bridging,what is orange peel,types of coating defects.

ROUGHNESS means when the coating solution spray in tablet bed but some droplets of tablet before drying so thats cough roughness
cause of toughness
1 high dgree of automization
2 high drying rate
3 nozzles to bed distance in close
if the roughness is more its means excissive toughness also known as ORANGE PEEL due to the improper spreading of coating solution in tablet before drying cause of orange peel

1 high degree of automazation air pressure
2 high drying rate
3 slow speed of pan
4 high viscosity of solutions
if the optimization of automations air pressure to prevent orange peel
optimizing drying rate
optimizing pan peed
LOGO BRINGING
means when the logo of the tablets does not show its means the coating solutions speeding on tablets bed in high amount and the logo of tablets don't show and breakline of tablet full coat with coating solution
CAUSE
1 high rate of spray
2 improper automization
3 improper formulation
4 poor punch logo design
5 high viscosity
solutions
reduced the spray rate
proper automization
reduced viscosity of coating solution
proper punch design

[manisharawat]

Thank u sir aese hi sub logo ka margdarshan krte rhe