Bamboo surface roughness has very important effect on the surface quality of bamboo products. After bamboo is treated with 'coldin and coldout' and 'hotin and hotout' process, the surfaces of treated bamboo are exactly measured with a precision instrument for surface roughness. It is discovered that bamboo surface roughness will take on great difference with different treating processes. The average values of bamboo surface roughness are much smaller when bamboo is treated with 'coldin and coldout' process than with 'hotin and hot...