Iriodin 510 Coffee Equivalent KT-510 Mica Pearl Pigment

KT-510 belongs to Kolortek's KT-500 Metal Luster series — mica flakes coated with ferric oxide (Fe₂O₃) to produce warm, opaque metallic effects. The coffee color is generated by controlling iron oxide layer thickness during manufacturing, which shifts the interference and absorption profile toward deep amber-brown tones.

Unlike standard pearlescent pigments that rely on light interference alone, iron oxide-coated mica delivers genuine metallic concealment — meaning it covers the substrate rather than just reflecting. That combination of color depth and hiding power distinguishes the KT-500 series from transparent effect pigments.

In practice, formulators sourcing an iriodin 510 equivalent will find KT-510 directly substitutable in most systems, with comparable color, particle range, and compatibility profile.

---

Series & Model Reference

Worth noting: the KT-500 series covers a range of iron oxide-coated mica grades beyond coffee. Contact Kolortek if you need color matching across the broader warm-tone metallic palette.

---

Key Characteristics

• Warm metallic lustre: Deep coffee-brown tone with a metallic sheen — not a flat brown, not a transparent shimmer. Reads as warm and structured across substrates.
• Strong concealing property: Iron oxide coating gives genuine opacity. Effective at covering substrates where transparent pearlescents would not.
• Chemical and physical stability: Resistant to common solvents, moderate acids, and processing conditions typical in coatings and cosmetic manufacturing.
• Natural mica base: Provides a smooth, platelet morphology that orients well in liquid systems and laminates effectively in film-forming applications.
• Consistent batch-to-batch color: Controlled oxide coating thickness ensures reliable color reproduction across production runs.

---

Applications

KT-510 performs across a broad range of application systems. Below are the primary end uses where it sees consistent deployment:

• Decorative paints and industrial coatings: Warm metallic finishes for interior architectural coatings, furniture lacquers, and specialty decorative systems.
• Cosmetics: Eye shadow, pressed powders, bronzers, and blushes where a warm coffee-brown metallic tone is required. Meets cosmetic-grade expectations when formulated appropriately.
• Nail products: Gel and lacquer systems. Particle size range allows smooth application and good film formation.
• Epoxy flooring: Metallic floor systems benefit from the concealing capacity and warm tone of KT-510, particularly in earthy or industrial-aesthetic designs.
• Soaps and craft: Suitable for melt-and-pour and cold-process soap making, resin casting, and similar craft applications.
• Printing inks: Finer particle fractions within the 10–60 μm range are applicable in screen and specialty printing where metallic warmth is needed.

---

Practical Formulation Considerations

Iron oxide mica pigments like KT-510 are generally forgiving in dispersion — the platelet structure resists excessive breakdown under moderate shear. That said, high-speed milling or aggressive dispersion equipment can fracture the mica platelets and reduce luster intensity. Pre-dispersion in a resin or carrier before let-down is the standard approach in most coating and ink systems.

In cosmetic formulations, KT-510 integrates well into oil and wax phases. It does not require surface treatment for standard pressed powder or loose powder formats, though treated variants may improve oil binding and skin adhesion in specific systems.

Compatibility is broad. KT-510 is stable in waterborne, solventborne, and UV-cure systems. For epoxy floors, pre-test at loading rates above 5% — iron oxide-coated pigments at high loadings can influence cure kinetics in some two-component formulations.

Loading rates typically range from 1–10% depending on substrate, system viscosity, and desired effect intensity. Optimum metallic coverage in coatings is usually achieved in the 3–6% range.

---

Sourcing Consideration: KT-510 vs. Iriodin 510

Formulators currently using Iriodin 510 Coffee from Merck often transition to KT-510 for cost efficiency without reformulation. The color, particle size distribution, and base chemistry are aligned. Kolortek manufactures KT-510 directly, which means factory-direct pricing and no distribution markups.

Technical documentation — TDS, MSDS, COA — is available for qualification testing. Batch-to-batch consistency is maintained through controlled manufacturing of the iron oxide coating layer, which directly determines the final color output.

---

Frequently Asked Questions

Q: Is KT-510 a direct drop-in replacement for Iriodin 510 Coffee?
In most systems, yes. Both are natural mica coated with iron oxide, with overlapping particle size ranges and comparable color output. Minor variation in shade is possible between manufacturers — sample evaluation before full qualification is standard practice.

Q: Is KT-510 suitable for cosmetic use?
Yes. The raw material composition — natural mica and iron oxide — is accepted in cosmetic formulations across most major regulatory frameworks. Kolortek can provide the relevant safety documentation for your compliance review.

Q: What particle size should I specify for printing applications?
For screen and specialty printing, the lower end of the 10–60 μm range is preferred. Specify fine-cut grades when ordering if your application requires consistent passage through fine mesh screens or tight coating gaps.

Q: What documentation is available for qualification?
Kolortek provides MSDS, TDS, and COA as standard. Reach out directly for formulation guideline support or to request samples for testing.

---

Request a Sample or Technical Information

If you're evaluating KT-510 as a sourcing alternative or working on a new formulation, sample requests and technical documentation are available on request. Contact the technical team at contact@kolortek.com with your application details and target specifications.