Technical Library

Sebum Resistant (SR)-Treated Pigments; INCI name: Trimethylsiloxysilicate

Trimethylsiloxysilicate (SR)-treated pigments and fillers provide superior adhesion to skin and hair. SR pigments are the best candidates to be used in long-wearing and water-resistant makeup. They are hydrophobic yet are not overly sensitive to oils including sebum. For more detailed technical information, see our article in Expression Cosmétique!

SR Treatment Benefits:

  • Superior skin adhesion
  • Water repellency
  • Low oil absorption
  • Provides long wear
  • Higher loading capacity

Recommended Uses:

  • Long-wearing lipsticks
  • Long-wearing foundations
  • Long-wearing eyeshadows
  • Long-wearing eyeliners
  • Long-wearing mascaras

Long-Wearing Eyeshadow with SR Pigments

Gelest’s Sebum Resistant (SR) surface treated pigments improve skin adhesion and wear resistance for a long-lasting formula.

INCI NameIngredientSupplierWeight %
Titanium Dioxide (&) TrimethylsiloxysilicateTitanium Dioxide SRGelest6.50
Iron Oxides (&) TrimethylsiloxysilicateRed Iron Oxide SRGelest4.50
Iron Oxides (&) TrimethylsiloxysilicateYellow Iron Oxide SRGelest5.80
Iron Oxides (&) TrimethylsiloxysilicateBlack Iron Oxide SRGelest3.20
Talc (&) TrimethylsiloxysilicateTalc SRGelest38.70
Magnesium Stearate----0.97
Zinc Oxide----6.50
Sericite----26.00
Phenoxyethanol----0.32
Stearyl MethiconeSiBrid® Stearyl Methicone TM-181Gelest1.90
PolydiethylsiloxaneSiBrid® Diethicone DE-15Gelest2.50
Ethylhexyl Palmitate----3.11

See in Formulary.

TiO2 Dispersion in Diethicone

Waterproof Mascara with SR Pigments

The Sebum Resistant (SR)-treated pigments increase water resistance and adhesion to the lashes while reducing the tendency to smudge.

INCI NameIngredient SupplierWeight %
Phase A
IsododecanePermethyl® 99APresperse23.05
PolyethyleneA-C® Polyethylene 6AHoneywell11.00
Euphorbia Cerifera WaxCandelilla WaxFrank B. Ross4.50
Polyglyceryl-3 Diisostearate PrisorinePrisorine™ 3700Croda0.25
Benzoic Acid----0.20
Phase B
Pentaerythrityl Rosinate--Ashland2.00
IsododecanePermethyl® 99APresperse2.00
Phase C
Zinc StearateZinc Stearate 921-GBrenntag1.00
Silica SilylateSilicon Dioxide, HMDZ-treatedGelest1.00
Phase D
IsododecanePermethyl® 99APresperse2.00
Iron Oxide (&) TrimethylsiloxysilicateBlack Iron Oxide SRGelest12.00
Phase E
Petroleum Distillates (&) Distearyldimonium Hectorite (&) Propylene CarbonateBentone Gel® SS-71Elementis35.00
Procedure:

  • Combine Phase B in a closed vessel and stir slowly until uniform.

  • Combine Phase D and mill using high shear agitation.

  • Combine Phase A in a closed vessel. Heat to 95 °C with stirring until clear.

  • Add Phase B with stirring.

  • Add Phase C and homogenize until dispersed.

  • Add Phase D and homogenize until dispersed.

  • Add Phase E and homogenize until dispersed.

  • Stir with side sweep agitation while cooling to 30 °C.
  • See in Formulary.