A composition, which is an organosol composition of polytetrafluoroethylene (PTFE) particles, comprising PTFE particles, an organic solvent, and a polymer soluble in, wherein the amount is ≥ 50 mass-% of the total amount of and, and the precipitation ratio of after 48 hours (PR 48) is ≤ 60% when the total solids concentration of and is 5 mass-%; wherein PR 48 is determined by - adding 8 ml of the organosol composition having a total solids concentration of and of 5 mass-% to a transparent glass screw tube No. 3 (vol. 10 ml), - irradiating the organosol with ultrasonic waves for 30 minutes with a BRANSONIC® B-521 ultrasonic cleaner, - leaving the organosol to stand still for 48 hours, - collecting the supernatant thereof and measuring the solids concentration [Sn] 48 thereof, and, - assuming that is completely dissolved in in the supernatant, determining PR 48 according to the formula PR 48 % = A i + B i − Sn 48 × 100 A i wherein i is the initial concentration of, i is the initial concentration of, both determined from the solids concentration of the organosol composition, and the composition ratio of and in the organosol composition measured by solid state NMR, and [Sn] 48 is obtained by weighing the solids content of the supernatant collected after the still standing and heating at 150°C for 3 hours. PTFE particles, an organic solvent, and a polymer soluble in, wherein the amount is ≥ 50 mass-% of the total amount of and, and the precipitation ratio of after 48 hours (PR 48) is ≤ 60% when the total solids concentration of and is 5 mass-%; wherein PR 48 is determined by - adding 8 ml of the organosol composition having a total solids concentration of and of 5 mass-% to a transparent glass screw tube No. 3 (vol. 10 ml), - irradiating the organosol with ultrasonic waves for 30 minutes with a BRANSONIC® B-521 ultrasonic cleaner, - leaving the organosol to stand still for 48 hours, - collecting the supernatant thereof and measuring the solids concentration [Sn] 48 thereof, and, - assuming that is completely dissolved in in the supernatant, determining PR 48 according to the formula PR 48 % = A i + B i − Sn 48 × 100 A i wherein i is the initial concentration of, i is the initial concentration of, both determined from the solids concentration of the organosol composition, and the composition ratio of and in the organosol composition measured by solid state NMR, and [Sn] 48 is obtained by weighing the solids content of the supernatant collected after the still standing and heating at 150°C for 3 hours. - adding 8 ml of the organosol composition having a total solids concentration of and of 5 mass-% to a transparent glass screw tube No. 3 (vol. 10 ml), - irradiating the organosol with ultrasonic waves for 30 minutes with a BRANSONIC® B-521 ultrasonic cleaner, - leaving the organosol to stand still for 48 hours, - collecting the supernatant thereof and measuring the solids concentration [Sn] 48 thereof, and, - assuming that is completely dissolved in in the supernatant, determining PR 48 according to the formula PR 48 % = A i + B i − Sn 48 × 100 A i wherein i is the initial concentration of, i is the initial concentration of, both determined from the solids concentration of the organosol composition, and the composition ratio of and in the organosol composition measured by solid state NMR, and [Sn] 48 is obtained by weighing the solids content of the supernatant collected after the still standing and heating at 150°C for 3 hours. i is the initial concentration of, i is the initial concentration of, both determined from the solids concentration of the organosol composition, and the composition ratio of and in the organosol composition measured by solid state NMR, and [Sn] 48 is obtained by weighing the solids content of the supernatant collected after the still standing and heating at 150°C for 3 hours.