Optically homogeneous thin films of chemically solubilized single-wall carbon nanotubes (SWNTs) have been realized by the Langmuir-Blodgett technique. Deposition can be performed in a layer-by-layer fashion either by horizontal or vertical deposition, allowing to precisely control the film thickness. Absorption spectra of these LB films preserving the spectral features characteristic of semiconducting and metallic SWNTs prove that no serious alteration of their electronic structures occurred throughout the solubilization and film deposition. Polarized absorption spectroscopy and AFM observation demonstrate that the tubes are highly oriented in the vertical dipping direction. These results provide important basis for the future development of the scientific understanding and technological applications of this new and exciting form of carbon.