Description
Radiant PC Series comprises daylight- and ultraviolet-responsive fluorescent pigments developed primarily for solvent-based formulations. The pigments are based on a dyed/pigmented thermoset sulphonamide-melamine-paraformaldehyde resin and are supplied in powder form.
With high colour strength and a fine particle size, the Radiant PC Series is particularly suited to gravure and screen printing inks, along with PVC and PU coatings, aerosols and solvent-based paints.
Key Technical Characteristics
- Highest colour strength within the solvent-based PC range
- Fine particle size of approximately 3.0 µm
- Suitable for gravure and screen printing inks
- Designed for solvent-based formulations
- Easy stir-in dispersion
- Daylight and UV-responsive fluorescent effect
- Thermoset pigment system
- Decomposition temperature above 300°C
- Suitable for selected PVC and PU coating systems
Physical Properties
| Parameter | Specification |
|---|---|
| Delivery Form | Powder |
| Particle Size | ± 3.0 µm |
| Hegman Grind | 5.5–6.5 |
| Melting Point | Thermoset |
| Decomposition Temperature | >300°C |
| Specific Gravity | 1.38–1.40 g/ml |
| Bulking Value | 0.25 g/ml |
| Oil Absorption | 56 |
Test methods and Certificate of Analysis (COA) are available on request.
Recommended Applications
Gravure & Screen Printing Inks
The combination of high colour strength and fine particle size makes the PC Series particularly suitable for gravure and screen printing ink applications.
PVC & PU Coatings
The pigments can be incorporated into suitable PVC and PU coating formulations where fluorescent colour is required.
Solvent-Based Paints
Radiant PC Series can be evaluated for solvent-based paint systems requiring strong fluorescent colour performance.
Aerosols
The series is also suitable for compatible aerosol formulations.
Colour Strength & Particle Size
High colour strength is one of the defining characteristics of Radiant PC Series. Its fine particle size of approximately 3.0 µm supports its use in printing applications where colour intensity and pigment fineness are important.
The pigments remain insoluble in the formulation and therefore require dispersion. However, the TDS specifies that they are easily stir-in, simplifying incorporation into suitable systems.
Solvent Compatibility
The PC Series is recommended for formulations involving:
- Water
- Aliphatic hydrocarbons
- Aromatic hydrocarbons
- Alcohols
- Esters
- Glycols
- Plasticizers
Since the pigments are insoluble, proper dispersion within the selected formulation is required.
Heat Stability
For PVC calendering, the documented heat-stability reference is 30 minutes at 170°C.
Actual performance can vary according to processing conditions, formulation and equipment, so production-scale suitability should be confirmed through application testing.
Standard Colour Range
Radiant PC Series is available in the following standard shades:
| Grade | Shade |
| PC-0-1283 | Chartreuse |
| PC-1-1284 | Green |
| PC-3-1285 | Orange |
| PC-4-1286 | Orange Red |
| PC-5-1287 | Red |
| PC-7-1288 | Pink |
| PC-8-1289 | Magenta |
| PC-8-1291 | Strong Magenta |
| PC-8-1292 | Purple |
| PC-9-1290 | Blue |
Processing & Formulation Notes
Radiant PC pigments are insoluble and need to be dispersed into the formulation. Their easy stir-in characteristics allow straightforward incorporation into compatible systems.
For aqueous formulations, the TDS recommends using an appropriate preservative package consisting of bactericides and fungicides to provide effective microorganism control in the intended formulation.
Lightfastness Consideration
The PC Series has limited lightfastness during exterior exposure, which is associated with the chemical structure of fluorescent pigments. Therefore, the pigment should be evaluated according to the intended exposure conditions and end-use requirements before selection.
Packaging & Storage
Radiant PC Series is supplied in:
- Packaging: 20 kg box
- MOQ: 20 kg
- Shelf Life: 120 months
For the stated shelf life, keep the product in its closed original packaging in a dry place at ambient temperature.
For grade selection, COA, SDS, shade availability or formulation-specific technical assistance, contact B. N. Mehra & Co. with your application and processing requirements.
