Production of Paint Using Powdered Eggshell Substitute to Calcium Carbonate
Student: Onyemuche Jude Opara (Project, 2025)
Department of Science Laboratory Technology
Federal Polytechnic, Nekede, Imo State
Abstract
This study investigated the use of powdered eggshells as a substitute for calcium carbonate in paint production. The results of the paint production using powdered eggshells showed a density of 1.0 g/ml, a drying time of 30 minutes for the first coat and 45 minutes for the second coat, and opacity reaching 95% coverage after the second coat. The resistance to external exposure varied across different surfaces, with wood showing no fading but slight peeling, metal exhibiting colour fading and minor rusting, and plastic maintaining full adhesion without discolouration. The pH value of the paint was recorded at 8.5. Brush-ability tests demonstrated smooth application with good coverage and a finish quality free of visible brush marks. These results suggest that powdered eggshells have the potential to be an effective substitute for calcium carbonate in paint production, offering comparable performance in terms of density, drying time, opacity, resistance to external exposure, pH value, and brush-ability. Further research is recommended to explore the feasibility of utilizing eggshells on a larger scale in the paint industry.
Keywords
For the full publication, please contact the author directly at: judicnelson@gmail.com
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Institutions
- Federal University of Technology, Minna, Niger State 47
- Federal University of Technology, Owerri, Imo State 95
- Federal University Oye-Ekiti, Ekiti State 41
- Federal University, Birnin-Kebbi, Kebbi State 37
- Federal University, Dutse, Jigawa State 6
- Federal University, Dutsin-Ma, Katsina State 63
- Federal University, Gashua, Yobe State 3
- Federal University, Gusau, Zamfara State 14
- Federal University, Kashere, Gombe State 1
- Federal University, Lafia, Nasarawa State 6