Coating formulation analysis: what a lab can and cannot tell you about a paint
A coating is an applied system
Coatings typically combine a film-forming binder, pigments or fillers, an application medium and smaller functional additives. The same binder family can be adjusted for gloss, hiding power, flexibility or corrosion resistance by changing pigment volume, filler type and additive package. A coating question therefore starts with the surface and service condition: a decorative panel, a metal part and a flexible substrate demand different comparisons. We look for a chemical explanation that the submitted material can support, while keeping application and curing conditions distinct from composition.
When a coating fails, the visually obvious feature is often the least specific clue. Blistering, poor adhesion or discoloration can be affected by substrate preparation, cure, moisture and formulation. A comparative question is more useful than naming a culprit in advance: do reference and suspect films differ in the retained binder or inorganic fraction? If the aim is substitution, specify whether the target is appearance, weathering or processing, because no single compositional match establishes all three.
What the physical form preserves
A cured film retains the nonvolatile structure after application but not the evaporated liquid phase. Powder coating, if submitted as powder, describes a pre-application mixture; the cured powder-coat film describes the reacted or fused layer. These are different analytical objects even when they come from the same product. Comparing a powder with a cured film without noting the transition can confuse a processing effect with a material difference.
We review cured coating films; water-based coatings and powder coatings require case-by-case review. We do not receive liquid solvent-based coatings from overseas. A cured film or solids fraction can be proposed, but conclusions then concern the submitted fraction rather than the complete wet paint. Describe the coating state, substrate and curing history when you declare it.
Read the result against the question
The report may identify specific compounds where evidence allows and broader chemical families where it does not. Estimated proportions are semi-quantitative rather than exact formulation percentages. A mineral signal may indicate an inorganic ingredient but does not by itself establish the commercial grade, particle treatment or supplier. We state unresolved portions rather than convert incomplete evidence into a complete coating bill of materials.
How to start
We accept overseas industrial samples after declaration review. Use the sample declaration form and read the related guide. Our reports are research-grade analytical reports from a laboratory that is not accredited. They cannot be used for product registration or legal proceedings.
FAQ
Can a cured coating film show the original solvent blend?
No. Solvents lost during film formation are absent from the cured sample, so a film cannot disclose the original liquid blend.
Are water-based coatings accepted automatically?
No. Water-based coatings are in our case-by-case review group, so acceptance follows declaration review.
Should I send powder or a cured panel?
Choose the form that matches the question: powder describes incoming material, while a cured panel describes the finished coating. Powder coatings are reviewed case by case, so declare the powder before planning around it.
Can composition alone explain coating failure?
Not always. Preparation, substrate and cure can contribute alongside composition; provide a sound reference when possible.
Send a sample declaration for this product and state the question you want answered.