1. A film-forming solution containing: - from 10 to 20% urea, - from 5 to 15% film-forming polymer, - from 45 to 65% polar solvent, - from 1 to 20% cosolvent, - from 0.01 to 5% plasticizer selected from the group consisting of diethyl phthalate, triethyl citrate, dibutyl sebacinate, diethyl sebacinate, dibutyl phthalate, acetyl triethyl citrate and polyethylene glycols, up to 100%. 2. The film-forming solution according to claim 1, containing from 13 to 17% urea. The film-forming solution according to claim 1, containing 15% urea. The film-forming solution according to claim 1, containing from 8 to 12% film-forming polymer, from 45 to 50% polar solvent, from 1 to 5% co-solvent, from 0.5 to 1% plasticizer and water to 100%. 5. The film-forming solution according to claim 1, wherein the film-forming polymer is Eudragit. The film-forming solution according to claim 5, wherein the film-forming polymer is selected from the group consisting of Eudragit E100, Eudragit RL / RS, Eudragit L100, Eudragit S100 and Eudragit L100-55.7. The film-forming solution according to claim 1, wherein the polar solvent is ethyl alcohol. The film-forming solution according to claim 1, where the co-solvent is selected from the group consisting of propylene glycol, glycerol, sorbitol and polyethylene glycol 200.9. The film-forming solution according to claim 1, containing from 10 to 20% urea, from 45 to 65% 96% ethanol, from 5 to 15% propylene glycol, from 5 to 15% Eudragit E100, from 0.5 to 1% diethyl phthalate and water up to 100% .10. The film-forming solution according to claim 1, including: - 15% urea, - 48.69% 96% ethanol, - 4.4% propylene glycol, - 10% Eudragit E100, - 0.63% diethyl phthalate and - 21 , 28% water. 11. The film-forming solution according to any one of the preceding paragraphs, used to remove pathological nail keratinized material. 12. The film-forming solution according to claim 11, wherein1. Пленкообразующий раствор, содержащий:- от 10 до 20% мочевины,- от 5 до 15% плен