Certain spin-coatable liquids and application techniques are described, which can be used to form nanotube films or fabrics of controlled properties. A spin-coatable liquid containing nanotubes for use in an electronics fabrication process includes a solvent containing a plurality of nanotubes. The nanotubes are at a concentration of greater than 1 mg/L. The nanotubes are pretreated to reduce the level of metallic and particulate impurities to a preselected level, and the preselected metal and particulate impurities levels are selected to be compatible with an electronics manufacturing process. The solvent also is selected for compatibility with an electronics manufacturing process.