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Paint Sample Preparation and Analysis Procedures
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Paint chip analysis procedures for paint failure diagnosis: this article describes a simple procedure for preparing paint samples for reflected light low to high magnification microscopic examination in the paint failure laboratory
. A procedure is described for mounting sectioned paint chips on edge for microscopic examination. This procedure is useful in the determination of paint layers, paint layer thickness measurement, and paint layer interactions. The procedure also permits detection of mold or debris which has been painted over.
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A Procedure for Preparing Paint Samples for Examination by Reflected Light Microscopy
Two simple chemical tests are described
for identification of paint as acrylic or alkyd, useful as a quick, inexpensive alternative to pyrolysis gas chromatography, We include photographs of the procedure for preparing paint chips for cross-section and flat surface analysis. and photos of the results of simple chemical analysis to identify paint samples as acrylic or alkyd paints.
The diagnosis and cure of paint failure on buildings, particularly on wood siding and trim, is quite possible if there is a careful and thorough inspection of the building, its history, its surfaces, and the actual points of paint failure.
It is diagnostic to compare the same coating on the same type of surface at different locations on a building and in areas of failed and not-failed paint.
Flat Surface View of Failing Paint Chips for Paint Failure Diagnosis
Paint chips and samples from a painted surface can be easily mounted flat for microscopic examination, though care should be taken in selection of mounting media to be sure that the media does not react with or modify the sample.
Flat mounting of paint chip samples to examine the exposed and inner surfaces is a basic step in microscopic examination and lab diagnosis of failing coatings.
Examination of the exposed paint surface in flat or planar view may disclose defects such as micro cracking, micro blistering, or contaminants.
Examination of the inner, hidden, or release-surface of sample paint chips from a failing coating can provide critical information needed to state the cause of the paint failure with confidence.
The inner paint surface may show wood fibers, chalked dust from the painted-on surface, or even separation of paint ingredients or surfactant bleeding which form critical diagnostic data but which cannot be seen with the naked eye.
Photographs of these failures are provided in other chapters of this document.
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Continue reading at PAINT FAILURE ANALYSIS LAB PHOTOS or select a topic from the closely-related articles below, or see the complete ARTICLE INDEX.
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- DIAGNOSING AND PREVENTING PAINT FAILURE ON BUILDING EXTERIORS.
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- MICROSCOPE TECHNIQUES for the LAB - general microscopy
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Citations & References
In addition to any citations in the article above, a full list is available on request.
- Leila Kotama, Product Manager, Tikkurila Paints Oy, Finland. Dr. Kotama has more than 20 years experience as a paint chemist.
- Runeberg, Ulrik, STAINING AND MICROBIOLOGICAL INFESTATION OF ACRYLIC PAINTINGS ON HARDBOARD [PDF] (2008),Conservator (Dipl. Rest./M.A.), Restaurierungszentrum der Landeshauptstadt Düsseldorf, Germany, Email: Rune-Ulrik@gmx.de Previously Museo de Arte Contemporáneo de Puerto Rico, San Juan Presented, April 2007 conference in Richmond Virginia, sponsored by the AIC (American Institute for Conservation), this paper discusses the staining and microbial infestation of acrylic paintings on hardboard. - private correspondence, ER <->DF 2020/01/05 - 2006/09/12. (Also see PAINT FALURE, DIAGNOSIS, CURE, PREVENTION)
- Bodycote Materials Testing, Ontario, Canada
- Paint and Surface Coatings, Theory and Practice, R. Lambourne & T.A. Strivens, Ed., Woodhead Publishing Ltd., William Andrew Publishing, 1999 ISBN 1-85573-348 X & 1-884207-73-1 [This is perhaps the leading reference on modern paints and coatings, but is a difficult text to obtain, and is a bit short on field investigation methods - DF]
Provides a comprehensive reference source for all those in the paint industry, paint manufacturers and raw materials suppliers, undergraduate and postgraduate students, and industrial paint users. R. Lambourne was in the Research Department at ICI Paints Division and the Industrial Colloid Advisory Group, Birstol University, UK. - Paint Test Laboratory Listings Welcome: independent forensic and microscopic or chemistry labs offering paint analysis or paint failure services are welcome to be listed here at no fee. Contact Us
- Our recommended books about building & mechanical systems design, inspection, problem diagnosis, and repair, and about indoor environment and IAQ testing, diagnosis, and cleanup are at the InspectAPedia Bookstore. Also see our Book Reviews - InspectAPedia.
- Analysis of Modern Paints, Thomas J.S. Learner, Research in Conservation, 2004 ISBN 0-89236-779-2 [Chemistry of modern paints, overview of analytical methods, pyrolysis-gas chromatography signatures of basic modern paints and their constituents, Fourier transform infrared spectroscopy for paint analysis, direct temperature-resolved mass spectrometry, and analysis in practice - technical reference useful for forensic paint science, focused on art works -DF]
- Art, Biology, and Conservation: Biodeterioration in Works of Art, Robert J. Koestler et als. Eds., Metropolitan Museum of Art, 2003, ISBN 1-58839-107-8
- Building Pathology, Deterioration, Diagnostics, and Intervention, Samuel Y. Harris, P.E., AIA, Esq., ISBN 0-471-33172-4, John Wiley & Sons, 2001 [General building science-DF - ** Particularly useful text **
- Dampness in buildings, Diagnosis, Treatment, Instruments, T.A. Oxley & E.G. Gobert, ISBN 0-408-01463-6, Butterworths, 1983-1987 [General building science-DF]
- Certainteed Weatherboard fiber cement siding and trim products - see certainteed.com/ or see certainteed.com/resources/sidingandtrimspecsheet.pdf
- "Moisture Control in buildings: Putting Building Science in Green Building," Alex Wilson, Environmental Building News, Vol. 12. No. 5. [Good tutorial, "Moisture 101" outlining the physics of moisture movement in buildings and a good but incomplete list of general suggestions for moisture control - inadequate attention given to exterior conditions such as roof and surface drainage defects which are among the most-common sources of building moisture and water entry.--DJF]
- MASONITE WOODRUF® ROOFING OR MASONITE OMNIWOOD® SIDING LAWSUIT SETTLEMENT NOTICE - PDF file
- Paint Handbook: testing, selection, application, troubleshooting, surface preparation, etc., Guy E. Weismantel, Ed., McGraw Hill Book Company, 1981, ISBN-10: 0070690618, ISBN-13: 978-0070690615, [Excellent but a bit obsolete paint theory and practice, also a bit light on field investigation methods, out of print, available used-DF]
How to select and apply the right paint or coating for any surface. The first major reference to help you choose the correct paint or other finish to do the job best on a particular surface exposed to a particular environment. Experts in the field give full advice on testing surface preparation, application, corrosion prevention, and troubleshooting. The handbook covers wood, metal, composites, and masonry, as well as marine applications and roof coatings. A ``must'' working tool for contractors, architects, engineers, specification writers, and paint dealers. - Paint and Surface Coatings, Theory and Practice, R. Lambourne & T.A. Strivens, Ed., Woodhead Publishing Ltd., William Andrew Publishing, 1999 ISBN 1-85573-348 X & 1-884207-73-1 [This is perhaps the leading reference on modern paints and coatings, but is a difficult text to obtain, and is a bit short on field investigation methods - DF]
Provides a comprehensive reference source for all those in the paint industry, paint manufacturers and raw materials suppliers, undergraduate and postgraduate students, and industrial paint users. R. Lambourne was in the Research Department at ICI Paints Division and the Industrial Colloid Advisory Group, Birstol University, UK. - Seeing Through Paintings, Physical Examination in Art Historical Studies, Andrea Kirsh, Rustin S. Levenson, Materials in Fine Arts, 2000 ISBN 99-051835 [ forensic science, technical reference, focused on art works - DF]
- Sealants, Durability of Building Sealants (RILEM Proceedings), J.C. Beech, A.T. Wolf, Spon Press; illustrated edition (1995), ISBN-10: 0419210709, ISBN-13: 978-0419210702
This book presents the papers given at the RILEM Seminar held at the Building Research Establishment, Garston, UK in October 1994. The book provides an opportunity for researchers to review up-to-date progress towards the achievement of the objectives of the standardisation of laboratory techniques of sealants in the variety of service conditions to which they are exposed. - In addition to citations & references found in this article, see the research citations given at the end of the related articles found at our suggested
CONTINUE READING or RECOMMENDED ARTICLES.
- Carson, Dunlop & Associates Ltd., 120 Carlton Street Suite 407, Toronto ON M5A 4K2. Tel: (416) 964-9415 1-800-268-7070 Email: info@carsondunlop.com. Alan Carson is a past president of ASHI, the American Society of Home Inspectors.
Thanks to Alan Carson and Bob Dunlop, for permission for InspectAPedia to use text excerpts from The HOME REFERENCE BOOK - the Encyclopedia of Homes and to use illustrations from The ILLUSTRATED HOME .
Carson Dunlop Associates provides extensive home inspection education and report writing material. In gratitude we provide links to tsome Carson Dunlop Associates products and services.
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