272 JOURNAL OF COSMETIC SCIENCE
Precise recommendations to obtain an optimized HIP gel-in-oil emulsion could be
established, concerning both the composition (minimum viscosity of the internal gel
phase and associated dose of rheology modifier minimum concentration of emulsifier
ratio between the two phases) and the preparation of the formulation. A mixing procedure
with medium shear using planetary devices, such as an anchor, during emulsification was
essential for the creation of the HIP formula.
The HIP gel-in-oil concept opens up formulation prospects thanks to its sustainable cold
manufacturing process, aesthetics with fresh first contact, and proven benefits for skin
applications.
ACKNOWLEDGMENTS
AUTHOR CONTRIBUTIONS
Liming Sun: conceptualization, methodology, investigation, validation, formal analysis,
data curation, writing—original draft, review and editing Carla Perez: conceptualization,
supervision, project administration, review Alicia Roso: conceptualization, formal
analysis, writing—original draft, review and editing, visualization.
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