Magnetic tape including characterized magnetic layer, tape cartridge, recording and reproducing device, and method of manufacturing

A method of manufacturing a magnetic tape,

• wherein the magnetic tape is a magnetic tape, which comprises a nonmagnetic layer comprising nonmagnetic powder and binder on a nonmagnetic support, and a magnetic layer comprising ferromagnetic powder and binder on the nonmagnetic layer;
• wherein
• a combined thickness of the nonmagnetic layer and the magnetic layer is less than or equal to 0.60 μm;
• a coefficient of friction as measured on a base portion of a surface of the magnetic layer is less than or equal to 0.35;
• at least the magnetic layer comprises one or more components selected from the group consisting of a fatty acid and a fatty acid amide;
• and
• a C—H derived carbon, C, concentration calculated from a C—H peak area ratio in a C1s spectrum obtained by X-ray photoelectron spectroscopy conducted at a photoelectron take-off angle of 10 degrees on a surface of the magnetic layer is greater than or equal to 45 atom %;
• and
• the method comprises:
• forming a nonmagnetic layer and forming a magnetic layer, wherein
• the forming of a nonmagnetic layer comprises:
• forming a coating layer by coating on a nonmagnetic support a nonmagnetic layer forming composition comprising one or more components selected from the group consisting of a fatty acid and a fatty acid amide, nonmagnetic powder, binder, and solvent, and
• drying the coating layer by a heat treatment,
• with cooling the coating layer being conducted between the coating and the drying by a heat treatment.