Pigment identification analysis: which pigment or filler is in my material?
Short answer
We can investigate relevant elemental amounts and supported pigment or filler families, distinguishing a measured element from an inferred ingredient. Cured films, plastic or rubber products, masterbatch and solid powders need declaration review; unlisted or chemically restricted powders require an individual decision rather than automatic acceptance. The English report gives supported identities, estimates and unresolved portions, without supplying crystal form, particle size, surface treatment, color difference or hiding-power results from elemental data.
What level of pigment or filler identity do you actually need?
Which common ingredient families might be present?
Common inorganic pigments and fillers include titanium dioxide, iron oxides, carbon black, calcium carbonate, talc, kaolin, barium sulfate, silica, mica, aluminum hydroxide and magnesium hydroxide. Organic pigments include phthalocyanine and azo families, whose molecular chemistry creates a different identification question from a mineral’s elemental composition. A colored material can contain several colorants and extending fillers, so its visible shade is not a unique ingredient label.
Does titanium mean one specific titanium-dioxide grade?
A titanium result establishes a titanium-containing contribution; titanium dioxide may be a plausible inference in the right context, but that inference is narrower than proof of every material detail. Elemental composition alone does not distinguish rutile from anatase, identify particle size or establish a surface treatment. Calcium likewise can have several sources, so an element amount should not be converted into a unique calcium-carbonate loading without supporting assumptions.
Will organic pigment or ash evidence complete the ingredient list?
Suitable accessible organic colorants can be investigated as compounds or families, but an insoluble pigment may be poorly represented in a soluble extract. Ash is generally a residue left after organic material is removed by heating, and it need not preserve every inorganic ingredient in its original chemical form. The concentrate-to-article distinction is covered in our masterbatch guide and dilution guide; here the question is the evidence for ingredient identity.
How would we separate elemental findings from pigment and filler assignments?
1. We would divide the accepted specimen with its material state recorded, keeping a powder, masterbatch, rubber article or cured film tied to its own concentration basis.
2. We would select preparation for accessible organic material and the inorganic contribution, checking whether the binder or carrier leaves a pigment fraction inadequately represented.
3. We would examine suitable organic colorants or associated additives with LC-MS/MS and suitable smaller molecules with GC-MS, using reference evidence before assigning a specific compound.
4. We would use ICP-MS to obtain relevant elemental amounts and estimate supported component proportions, marking any assumed element-to-ingredient conversion rather than presenting it as direct identification.
5. We would review alternative sources for each element and compare like specimen states where available, leaving chemically plausible but unresolved filler assignments visible in the conclusion.
Why can an elemental measurement suggest a filler but not its crystal form?
ICP-MS measures relevant elements after suitable preparation by converting the prepared material into ions and separating them by mass-to-charge ratio. That process supplies elemental amounts but does not preserve the original arrangement of atoms in a pigment crystal or show its particle surface. LC-MS/MS instead separates suitable dissolved organic molecules and examines selected ion-fragment relationships, so adequate evidence can support a specific colorant or a broader family. GC-MS can support suitable smaller organic compounds, but an inaccessible pigment is not made measurable simply by choosing that technique. Combining these results reduces unsupported assignments, while carbon black and unresolved insoluble colorants still require explicit limits rather than invented identities.
What will the pigment and filler report state, and what will it not establish?
The conclusion card and component table would keep elemental amounts, supported chemical families and inferred ingredients distinct, with approximate proportions and unresolved assignments explained alongside the data appendix. The report does not turn an elemental match into proof of equal crystal form, particle size, surface treatment, color difference or hiding power.
Our reports are research-grade analytical reports from a laboratory that is not accredited. They cannot be used for product registration or legal proceedings.
Which pigment-containing sample should you declare before shipping?
Cured films, new plastic or rubber products, masterbatch and eligible solid pigment or filler powders can be considered after declaration and SDS review. Unlisted powders are reviewed case by case after declaration; hazardous-list ingredients require specific review and are not presumed acceptable. Start with the industrial inquiry page and shipping guide; send only after an acceptance number is issued.
FAQ
Does detecting titanium establish rutile?
No; titanium is elemental evidence, and it cannot independently distinguish rutile from anatase or another titanium-containing ingredient.
Does inorganic content equal one filler’s loading?
No; several pigments, fillers and inorganic additives can contribute, so a combined fraction does not supply a unique individual loading.
Can an extract exclude an insoluble organic pigment?
No; poor solubility or incomplete extraction can leave a pigment underrepresented, so an extract alone may not establish absence.
Will the analysis establish hiding power?
No; composition and elemental amounts do not provide an optical hiding-power result for the finished coating or plastic article.
Send a sample declaration and tell us what you want to learn from this sample.