Zero-Compromise Laboratory Testing & Batch Traceability
In industrial polymer compounding, inconsistent pigment quality causes process downtime, clogged extruder screens, and color drifting. Our dedicated testing laboratories verify every batch before dispatch.
Comprehensive Analytical Testing Battery
Every production batch undergoes six sequential quality gates before being released for packaging.
Spectrophotometric Color Matching (ΔE ≤ 0.8)
Each production lot is measured against agreed master standard swatches in both masstone (100% full shade) and tint reductions (1:10 and 1:20 with TiO₂) using calibrated spectrophotometers to ensure ΔE ≤ 0.8.
Filter Pressure Value (FPV) Testing
Compounded into standard polymer carrier and passed through a 14-micron screen pack on an automated capillary extruder to measure backpressure rise in accordance with DIN EN 13900-5.
Laser Diffraction Particle Size (D50 / D90)
Continuous laser granulometry verifies tight, unimodal particle distribution between 0.5 µm and 2.5 µm with 325 mesh sieve residue strictly below 0.10%.
Trace Element & Heavy Metal Screening
Inductively Coupled Plasma (ICP-OES) testing ensures absolute compliance with European toy safety EN 71-3, CONEG packaging limits (< 100 ppm total), and FDA purity mandates.
Thermal Stability & Dwell Testing
Laboratory injection molding machines evaluate color shift and thermal stability at stepped dwell times between 200°C and 350°C in high-heat engineering thermoplastics.
Water Soluble Matter & Moisture Analysis
Loss on drying at 105°C and electrical conductivity testing of aqueous extracts guarantee ultra-low soluble salt content and sub-0.10% moisture in specialty grades.
Analytical Equipment & Quality Control Standards
Our Hathras plant operates dual testing laboratories equipped with benchtop spectrophotometers, laser particle analyzers, and wet-dispersion testing rigs.
Spectrophotometer CIELAB Color Verification
Precision digital color matching ensuring ΔE ≤ 0.8 against client master standards and full EU regulatory conformance.
Wet Dispersion & Soluble Salt Verification
Standardized extraction tests ensuring <0.1% moisture retention and zero heavy metal bleed in food-contact polymer grades.
Batch-Specific Analytical Certificates Dispatched with Every Order
Whether you receive a 1-metric-ton sample trial or multiple 40ft sea containers, RS Pigments issues an authorized Certificate of Analysis linked directly to the production batch number stamped on each bag.
Schedule a Quality Audit or Request Evaluation Samples
Our quality control documentation, audit checklists, and laboratory samples are available to industrial procurement teams worldwide.