Abstract: A working fluid for heat cycle, which has less influence over the ozone layer, has less influence over global warming, and has favorable cycle performance, is provided. The working fluid contains trifluoroethylene and difluoroethylene and the proportion of the difluoroethylene is less than 1.5 mass % based on the working fluid.

Abstract: To provide a working fluid for heat cycle, which has less influence over the ozone layer and has less influence over global warming, and which has favorable cycle performance. A working fluid for heat cycle, which contains trifluoroethylene and difluoroethylene, in a proportion of the difluoroethylene of less than 1.5 mass % based on the working fluid.

Abstract: To provide a lubricant solution which does not impair the global environment, which provides an excellent solubility of a lubricant, which has a sufficient drying property and with which a uniform lubricant coating film can be formed, and a method for producing an article provided with a lubricant coating film, using the lubricant solution. A lubricant solution which is a solution of a lubricant, wherein the solvent is a solvent containing 1,1-dichloro-2,3,3,3-tetrafluoro-1-propene. A method for producing an article provided with a lubricant coating film, which comprises applying the lubricant solution to an object to be coated, and evaporating the solvent to form a lubricant coating film on the object.

Abstract: To provide a process for removing water, which is free from formation of stains due to transfer of an article among dipping sumps, with which the water removal performance will not be decreased even for an article having a complicated shape, which can suppress suspension of water in a water removal solvent in a dipping sump, and which can maintain stable water removal performance continuously for a long period of time only with one dipping sump.