KT-F60-50-WR Flame Copper XiallicSparks Pigment

What Makes the XiallicSparks Series Different from Standard Pearlescents

Most of Kolortek's pearlescent lines — the KT-100 through KT-9000 ranges — are built on natural or synthetic mica. XiallicSparks is a separate, specialized series that uses an alumina (Al₂O₃) crystal flake substrate instead. That substrate distinction is not cosmetic. Alumina has a refractive index of 1.76 compared to roughly 1.58 for natural mica, and its surface is exceptionally smooth, which allows for thinner, more uniform optical coating layers. The result is a different category of visual effect: each platelet functions like a miniature mirror, producing sharp, faceted highlights with high color purity rather than the soft, diffuse glow characteristic of mica-based pearls.

In our application lab, we position XiallicSparks explicitly for formulators who need that crystal-effect sparkle — the kind visible in premium automotive finishes where individual light reflections appear as distinct, bright flecks rather than a continuous sheen. If your target effect is soft luster or general interference color, the standard Kolortek pearlescent series is more economical and appropriate. XiallicSparks carries a cost premium, and it's there for a reason.

Technical Specifications — KT-F60-50-WR Flame Copper

Full XiallicSparks Series — Available Grades

KT-F60-50-WR is one of 11 shades in the XiallicSparks range. All share the same 6–30 μm particle size and alumina flake substrate. The series covers silver, gold, red, blue, green, violet, and purple colorways, giving formulators full palette coverage within a consistent optical platform.

Application Guide: Automotive Sparkle Pigment Performance in Basecoat Systems

KT-F60-50-WR is engineered for automotive OEM and premium refinish applications. That scope is deliberate — the alumina substrate's optical properties and its cost point make it the right tool for top-line metallic and crystal automotive finishes, not for general decorative work where the standard Kolortek pearlescent series provides better economics.

The pigment is also applicable to high-end industrial coatings, including premium consumer electronics and luxury goods, where an automotive-grade sparkle effect is the target. Outside those contexts, we typically steer customers toward other series.

Recommended Loading and Basecoat Strategy

In automotive basecoat formulations, a loading of 3–8% on total paint weight is the practical working range. The alumina platelets orient flat and parallel to the substrate in liquid coatings, which is what produces the uniform sparkle distribution in the cured film. To maximize the visual impact of the copper crystal effect, apply over a black or dark basecoat — the high transparency of the alumina flakes means the underlying color strongly influences the final appearance.

Multiple thin coats consistently outperform a single heavy coat in terms of platelet orientation and sparkle uniformity. Finish with a high-gloss clearcoat, which both protects the pigment layer and amplifies the crystal effect optically.

Formulation and Processing Considerations

Dispersion

Pre-disperse KT-F60-50-WR in a small portion of the binder before incorporating into the bulk system. A Cowles blade or equivalent high-speed disperser works well. One thing to note: avoid milling or any high-shear processing step that could fracture the alumina flakes. Unlike mica, alumina substrates are crystalline, and mechanical damage to the platelet geometry directly degrades the sparkle effect. The same principle applies to recirculation — high-shear pump recirculation loops in production equipment are a common source of platelet damage that formulators don't always trace back to the mixing stage.

Solvent System and Flash-Off

For best platelet orientation, work with coating systems that have slow solvent flash and good flow characteristics. Flash-off timing between basecoat and clearcoat is critical — rushing that stage disturbs platelet alignment while the film is still mobile. Avoid over-thinning the basecoat; it can disrupt orientation without improving flow in the way that a properly formulated system with the right solvent profile does.

Xirallic Replacement Pigment: Competitive Positioning vs. Merck Xirallic®

The XiallicSparks series was developed as a direct functional alternative to Merck Xirallic® effect pigments, sharing the same Al₂O₃ crystal substrate technology that defines that class of effect pigment. KT-F60-50-WR is mapped against Xirallic T60-20 in our internal equivalence table — though we recommend confirming exact shade alignment against your current Xirallic reference panel before committing to a full production switch, since color perception in these high-chroma copper tones can be sensitive to minor coating system differences.

One practical reason customers switch to XiallicSparks: factory-direct supply from Kolortek eliminates distributor margin. We don't publish pricing, but the cost differential for comparable alumina-substrate quality is significant enough that it's consistently cited by automotive coatings customers as the primary evaluation driver — ahead of shade matching.

It's worth being precise about what XiallicSparks replaces: this series is the Xirallic-class alternative. It is not a replacement for Iriodin® grades, which are mica-based and serve a different optical effect category. If you're sourcing an Iriodin equivalent, the relevant Kolortek series are the KT-100 through KT-9000 pearlescent lines.

Quality and Compliance

Kolortek operates under ISO 9001:2015 quality management, covering production and sales across all pigment and glitter lines including XiallicSparks. SDS documentation ships with all product orders as standard practice.

Two areas where we advise direct confirmation rather than assumption: REACH registration for this Al₂O₃-based product requires product-specific verification — the REACH certificate on file at Kolortek covers fluorphlogopite (synthetic mica) grades specifically. Additionally, XiallicSparks are not recommended for cosmetic applications and have not been developed or tested for face-safe certification.

Frequently Asked Questions

What is the difference between KT-F60-50-WR and a standard mica-based pearlescent pigment?

KT-F60-50-WR uses an aluminum oxide (Al₂O₃) flake substrate with a refractive index of 1.76, compared to roughly 1.58 for natural mica. This higher refractive index, combined with the smooth alumina surface, produces a faceted, mirror-like crystal sparkle with high color purity — categorically different from the soft, diffuse glow of mica-based pearl pigments. It is a non-pearlescent, crystal-effect pigment in the 6–30 μm particle size range.

Is KT-F60-50-WR a direct replacement for Merck Xirallic® flame copper grades?

Yes — KT-F60-50-WR is designed as a xirallic replacement pigment and is mapped against Xirallic T60-20 in the Kolortek equivalence reference. Both use an Al₂O₃ crystal substrate and operate in the same automotive basecoat/clearcoat context. That said, we recommend a panel comparison against your existing Xirallic reference before final approval, particularly for high-chroma copper tones where coating system variables can influence perceived color.

What loading rate and application method gives the best crystal sparkle effect?

In automotive basecoat systems, a loading of 3–8% on total paint weight is recommended. Apply multiple thin coats over a dark or black basecoat to maximize platelet orientation and visual contrast. Top with a high-gloss clearcoat. Avoid high-shear mixing or milling at any stage — fractured alumina platelets reduce sparkle intensity and cannot be recovered in the formulation.

Can KT-F60-50-WR be used in cosmetic formulations?

No. XiallicSparks grades, including KT-F60-50-WR, are not recommended for cosmetic applications. The series has been developed and tested exclusively for automotive and high-end industrial coating systems. Formulators looking for Kolortek cosmetic-grade effect pigments should reference other series designed and certified for that use.

Contact our technical team to discuss formulation requirements or to request a shade panel for your specific automotive coating project.