Quality Control Management in a Paint Manufacturing Industry in Kano State, North West Nigeria

Quality control is central to competitiveness and regulatory compliance in the Nigerian paint manufacturing industry, where consumer safety standards and raw material variability create persistent challenges for production chemists. This study examines quality control management practices at a medium-scale paint manufacturing company in Kano State, North West Nigeria, using a process audit approach combined with laboratory-based product quality evaluation. Quality control procedures are reviewed against Nigerian Industrial Standard specifications for decorative and industrial paints, covering raw material incoming inspection, in-process control at mixing and grinding stages, and finished product testing. Key quality parameters evaluated for emulsion and alkyd paint samples include viscosity, pH, density, hiding power, gloss level, drying time, adhesion, flexibility, and accelerated weathering resistance. Cause-and-effect diagrams and statistical process control charts are used to identify recurring quality deviations and their root causes within the production process. Interviews with quality assurance staff reveal gaps in calibration frequency for measuring instruments and inadequate documentation of non-conformance management procedures. A quality improvement framework is proposed that incorporates statistical process control implementation, standard operating procedure revision, and training recommendations for technical staff. The study demonstrates how systematic quality management approaches can reduce product rejections and enhance customer satisfaction in mid-tier Nigerian paint manufacturers. Keywords: quality control, paint manufacturing, Kano, Nigerian Industrial Standard, statistical process control