Loreal

Last updated January 31, 2026

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Azopyridinium and thiol fluorescent dyes: LorealRecent Research Landscape

Unstable pigment precursors degrade in aqueous environments, leading to inconsistent fiber coloration. Precise control of the azomethine-pyrazolopyridine stoichiometry in anhydrous vehicles ensures stable delivery and uniform oxidative coupling.

What technical problems is Loreal addressing in Azopyridinium and thiol fluorescent dyes?

Keratin fiber color instability

(12)evidences

Standard dyeing processes suffer from poor pigment adhesion and wash durability on keratin surfaces. Improving color retention and uniformity under environmental stress prevents premature fading.

Inadequate keratin fiber coloration

(10)evidences

Natural and synthetic dyes often suffer from poor wash fastness and environmental degradation on hair. Improving color retention and uniformity ensures long-lasting aesthetic results.

Keratin fiber color instability

(4)evidences

Non-uniform pigment distribution and poor color intensity on hair surfaces. Achieving homogeneous and durable chromatic results across varying fiber porosities provides a competitive aesthetic advantage.