Patent ID: 8747741

Claim:
Method for successively sterilizing first and second fluid cosmetic products within a same sterilization circuit traversing heated product baths, wherein the first product has a first viscosity and the second product has a second viscosity different from the first viscosity, which method comprises successively: (i) circulating the first product in said sterilization circuit at a first regulated pressure, and (ii) circulating the second product in said sterilization circuit at a second regulated pressure, wherein each of said circulating steps comprises successively: preheating said product in a preheating bath; heating quickly said product in a bath at high temperature, then cooling immediately and abruptly said product in a cold glycol bath; and packaging said product in a sterile atmosphere, wherein the first regulated pressure is different from the second regulated pressure, so that the pressure is regulated in accordance to the viscosity of said product, and each of the first and second regulated pressures is in a range of from 8 to 160 bars, wherein the sterilization circuit comprises a sheath having an inner diameter from 5 to 10 millimeters, wherein the sheath includes a first section in the preheating bath, a second section in the high temperature product bath, and a third section in the glycol bath, and wherein each of the first and second products is circulated in the sheath at the first and second regulated pressure, respectively, during the preheating, heating and cooling of the circulating step, so that each of the first and second products is preheated in the preheating bath to at most 90 degrees C. and heated in the high temperature bath to at least 135 degrees C.