Dayglo Fluorescent Pigments Optimize Highperformance Coatings

TW 3942 GT-13 Rocket Red is a fluorescent powder pigment in DayGlo's product range, developed for industrial coatings and inks that require high-saturation color and weather resistance. The product belongs to the GT series, which is distinguished from the T series by higher tinting strength while retaining solvent and heat resistance. Its formulation is intended for applications in which fluorescent color must withstand demanding processing and service conditions.

Technical differences between GT and T series

DayGlo fluorescent powders are divided mainly into the T and GT series. Both are thermoset resin-based fluorescent pigments designed for formulations exposed to elevated temperatures and aggressive solvents. The key difference lies in color strength and the resulting application profile.

The GT series, including GT-13, is produced through an optimized process that maintains the same resistance profile as the T series while offering greater tinting strength. At equal formulation ratios, the GT series can therefore produce more vivid color, a characteristic relevant to coatings that require stronger visual impact.

Application compatibility and chemical stability

TW 3942 GT-13 shows strong stability across a range of resin systems. In waterborne latex systems, it is reported to provide long-term shelf stability. In solvent-based systems, it demonstrates strong resistance to bleeding; even under heat and pressure, the pigment particles are intended to retain their structure and avoid color migration.

The pigment is compatible with the following resin systems:

• Nitrocellulose
• PVC-acetate
• Polyamide
• Acrylic
• Chlorinated rubber

Dispersion guidance for optimal performance

The performance of fluorescent pigments depends heavily on the dispersion process. Because of their particle characteristics, simple stirring is often insufficient to achieve the desired color saturation. A controlled procedure is recommended.

1. Pretreatment: Select the GT or T grade according to the required color strength.
2. Accurate metering: Weigh the pigment and carrier ratio precisely to ensure batch-to-batch consistency.
3. Dispersion: Add the powder slowly to the carrier and use high-shear equipment, such as a Cowles dissolver, at high speed until the pigment is fully wetted and evenly dispersed.
4. System verification: When using strong solvent combinations, conduct a small-scale test before production to confirm compatibility with the solvent system.
5. Loading rate: For paint finishes, a starting addition level of 15% to 20% by weight is recommended.
6. Substrate testing: Fluorescent colors are somewhat transparent, so spray or print tests must be carried out on a white substrate to assess final color development and adhesion.