a heating rate of 10 u00b0 c min in the visible range wavelength 380 750 nm the coating absorbance reached over 96 not shown here the adhesion of cnt binder based coating on aluminum substrate corresponds to iso class 0 the edges of the cuts are completely smooth and a cross cut area near to 0 was affected not shown here 250 mg of carbon nanotubes baytubes and 500 mg of dispersing agent byk 9077 were dispersed in 49 g dimethylformamide the mixture was sonicated for 20 minutes at 750 w in pulses of one second on and one second off 750 mg of the silicon resin silres ren 100 was added to the dispersion and sonicated for 5 minutes at 750 w in pulses of one second on and one second off the coating was prepared by spray deposition on a heated aluminum substrate the samples were dried on at 70 u00b0 c and then baked at 350 u00b0 c for two hours the coatings show high performance in absorbing vis and nir light thus enabling reduction of the unwanted stray light in optical systems the reflected light r was gt 4 5 in the vis range wavelength 400 700 nm fig6 coating formed from dmf based dispersion comprising cnt and low binder content silres ren 100 in mixture 250 mg of carbon nanotubes baytubes and 500 mg of dispersing agent byk 9077 were dispersed in 49 g dimethylformamide the mixture was sonicated for 20 minutes at 750 w in pulses of one second on and one second off 250 mg of the silicon resin silres ren 100 was added to the dispersion and sonicated for 5 minutes at 750 w in pulses of one second on and one second off the coating was.