Provided are a low-noise, high-performance magnetic recording medium obtained by fining the size of the grains in a magnetic film, and a magnetic recording medium of low thermal demagnetization obtained by controlling the magnetic grain size in a small range. Thereby, a desired signal portion of the input video signal is arbitrary corrected in response to the hue and saturation in real time. The negative first lens group includes positive-negative cemented lens elements, and the most object-side surface thereof is a concave surface. This new variety is characterized by excellent fruit quality, very good shelf life, and an early harvest season, and is suitable for both machine and hand harvest. Thereby, the present invention provides a fabric for fireproof clothing that has excellent light resistance and heat resistance, and preferable dye-affinity and that can be produced at low cost, and fireproof clothing using the fabric.