What quality testing is performed on every pigment batch?

Every batch undergoes: spectrophotometric color measurement (CIE Lab, ΔE vs reference), tinctorial strength test, lightfastness validation (ISO 105-B02 Blue Wool scale), heat stability testing in target polymer system, particle size distribution (laser diffraction, d50 measurement), oil/water absorption, moisture and ash content, chemical resistance (acid, alkali, solvent bleed), and final visual inspection. No batch ships without documented sign-off and a Certificate of Analysis.

What is ISO 17025 lab accreditation and why does it matter?

ISO 17025 is the international standard for testing and calibration laboratory competence. ISO 17025 accreditation means our lab follows internationally recognized methods, uses calibrated equipment with traceability to national standards, and produces test results that are accepted globally. For pigment buyers, ISO 17025 means you can rely on our COA data for your own quality systems and regulatory submissions.

How is pigment lightfastness tested?

Lightfastness is tested per ISO 105-B02 using a xenon-arc weatherometer that simulates accelerated UV exposure. The pigment sample (in coating or polymer matrix) is exposed alongside the Blue Wool reference scale (ratings 1-8). After defined exposure cycles, color change is measured spectrophotometrically and compared against the Blue Wool standards. A rating of 8 means equivalent fade to the most light-fast Blue Wool reference, indicating 5+ years of outdoor durability.

How is pigment heat stability tested?

Heat stability is tested by injection moulding the pigment into a target polymer (typically HDPE or PP) at progressively higher temperatures (200°C, 240°C, 280°C, 300°C). Test plaques are compared spectrophotometrically against a reference. The maximum temperature at which ΔE remains less than 1.5 is recorded as the heat stability rating. Some labs additionally check for color shift, specks, or polymer degradation.

What documentation accompanies a pigment shipment?

Every Kanani Pigment & Paste shipment includes: Certificate of Analysis (COA) with batch number and test results, Safety Data Sheet (SDS) per GHS, REACH compliance declaration, 24-banned-amines-free certificate (where applicable), commercial invoice, packing list, and certificate of origin for international shipments. Custom certifications (FDA, RoHS, halogen-free, etc.) available on request.

How long does a Certificate of Analysis remain valid?

A Certificate of Analysis (COA) is batch-specific and valid for the life of that production batch (typically 1-2 years from manufacture, depending on packaging and storage conditions). Each new batch produces a new COA. Pigments stored properly in original sealed packaging maintain their certified specifications throughout the indicated shelf life.

Quality Assurance | ISO 17025 Lab, DIN-ISO-IS Testing

Our Standards

Built on a Foundation of Trust

A rejected production batch is expensive. A customs hold over missing paperwork is worse. A bulk order that fails the qualifying sample is the worst. Every batch of pigment that leaves our facility carries the assurance of multiple quality checkpoints, from incoming raw-material inspection to finished product release testing. Each stage is conducted under documented procedures and benchmarked against international standards including DIN, ISO and IS, so problems are caught here, not on your production line.

Batch Consistency

Stringent in-process controls and statistical process monitoring ensure colour strength, shade and particle size remain within specification across every batch, eliminating the lot-to-lot variability that compromises formulation performance.

Comprehensive Testing

Every grade is tested for masstone colour, tint strength, lightfastness (ISO 105-B02), heat stability, dispersibility and chemical resistance prior to release. Our laboratory operates against approved test methods aligned with DIN, ISO and IS standards.

Bulk Supply Reliability

Robust inventory management and a dependable supply chain ensure on-time delivery for bulk orders. We maintain strategic buffer stocks of key grades to insulate your production schedule from supply disruptions and seasonal demand peaks.

Documentation & Traceability

Every shipment is accompanied by a Certificate of Analysis, Safety Data Sheet and complete traceability documentation, enabling our customers to maintain robust quality records and meet the strictest regulatory requirements.

Testing Equipment

Our Laboratory Capabilities

Our quality control laboratory is equipped with modern analytical instruments enabling rigorous characterization of every pigment grade we manufacture.

Spectrophotometer

Precision colour measurement plus masstone strength and tint assessment against certified reference standards.

Particle Size Analyzer

Laser-diffraction analysis ensuring optimal particle distribution and validated dispersion performance.

Lightfastness Tester

Accelerated UV exposure testing conducted against the ISO 105-B02 international standard.

Heat Stability Oven

High-temperature stability testing for plastics and coatings grades, validated up to 300°C processing conditions.

Chemical Resistance Testing

Acid, alkali and solvent-bleed resistance evaluation conducted in accordance with standard international test methods.

Moisture & Ash Content

Precision moisture and volatile-matter determination, validated against published product specifications.