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Project at a Glance

Title: Correlation between solids content and hiding as it relates to calculation of VOC content in architectural coatings.

Principal Investigator / Author(s): Censullo, Albert C.

Contractor: California Polytechnic State University

Contract Number: 01-307

Research Program Area: Emissions Monitoring & Control

Topic Areas: Stationary Sources


The contractor designed a set of experiments to evaluate the effect of volume and type of solids on coverage and hiding for water-based and solvent-based architectural coatings. The experimental design was implemented by formulating thirty water-based and solvent-based coating samples with varying amounts and types of pigments and resins. Thirty unique formulations were prepared, corresponding to coatings commonly used in California. Coating classes included flat, eggshell, semigloss and gloss. Once formulated in agreement with the experimental design, the coatings were applied to well-defined surfaces, and evaluated by a series of standard tests for coverage, film thickness, hiding, and color, as appropriate to the coating type. A new potential measure for coatings, Hiding VOC, was proposed. This amounts to the grams of VOC associated with the formation of 1.00 square meter of a "hiding" film, as defined by ASTM Method D2805-96a. A comparison was made between selected solvent-based and water-based coatings, to explore the relative hiding abilities of each. The contractor summarized and interpreted the results of the testing program.


For questions regarding this research project, including available data and progress status, contact: Research Division staff at (916) 445-0753

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