French green clay (illite) is a mineral-rich clay mined from quarries in France, its green color coming from iron oxides and decomposed plant matter trapped in the clay. It's typically used in formulations as a purifying, oil-absorbing mask or cleanser ingredient.
How is it used?
Mix with water or a hydrosol just before use for a mask, or incorporate into a cleanser or soap formula as a powder.
Forms
Available forms and grades affect how this ingredient behaves and how it should be selected for a formula.
Appearance
Color, texture, and physical characteristics can vary between suppliers and product grades.
Usage rate
Recommended incorporation levels depend on product type, supplier guidance, and the intended result.
Why we use it
Formulators choose this ingredient for specific performance, sensory, and stability benefits.
Strengths and limitations
Its advantages, compatibility considerations, and practical tradeoffs should be weighed during development.
Alternatives and substitutions
Possible replacements depend on the ingredient's role, desired skin feel, and formulation system.
Storage and shelf life
Appropriate storage conditions help protect quality and performance throughout the ingredient's usable life.
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