US Patent 7201805 Grease removing method and device

This invention relates to a degreasing process and device. It is particularly useful for degreasing surfaces coated with lanoline. The process according to this invention comprises a step to clean the surface to be degreased with a cleaning solvent and a step to rinse the cleaned surface with a rinsing solvent, said cleaning solvent including a solvent A comprising dipropylene glycol monomethyl ether with a boiling point of more than 100° and without a flash point or with a flash point of more than 70°, and said rinsing solvent comprising a solvent B comprising 1,1,1,2,3,4,4,5,5,5-decafluoropentane with a boiling point less than 70° and a surface tension less than 30 mN/m.