Water separation, floating color, thickening, or even flocculation after adding colorant to coating is often a signal of incompatibility between the colorant and base material. Compatibility is not mysticism; it can be identified and avoided before production through standardized methods. This article gives three commonly used compatibility testing methods and explains the response approach when […]
Many newcomers to color matching have a confusion: the color seen on the screen is clearly described by three values of red, green, and blue, so why can’t it be matched with three colorants of red, yellow, and blue in actual color matching? Behind this are two completely different color rendering logics—screens rely on luminous […]
“How much colorant should be added for this color” is a question the color matching position must answer every day. Too little and the color is not there; too much not only wastes cost but may also affect coating adhesion, scrub resistance, and gloss due to excessive pigment volume concentration. In actual production, there are […]
Whether colorants are used correctly directly determines the color accuracy, stability, and batch consistency of the final coating film. Many on-site problems such as floating color, blooming, out-of-tolerance color difference, and regrinding and caking do not originate from the colorant itself, but from operational details in the steps of opening the drum, stirring, metering, dispersing, […]
2KPU (two-component polyurethane) is known for high gloss, high fullness, and excellent weather resistance, commonly used in automotive, engineering machinery, and high-end industrial topcoats. But it is extremely picky about colorants: it must preserve gloss while resisting yellowing and weathering. This article breaks down the dual challenges of 2KPU colorants and responses. Application Scenarios of […]
Two-component coatings rely on the reaction between the main agent and curing agent to form a film. They are high-performance but “delicate.” If the colorant is incompatible with the curing agent, gelling, floating color, or even non-curing may occur. This article focuses on the most core compatibility issue in two-component coloring, helping you avoid color […]
Compliance & Certification | Technical Application Colorant export is never simply “goods arrive and that’s it”—it is “documents first, compliance first.” The EU market has three hard thresholds: REACH, RoHS, and EN71-3. The United States has TSCA, Japan has CSCL, and the absence of any one of these can lead to return shipments, notifications, or […]
Applied Technology | Technical Parameters Tinting strength is one of the most core performance indicators of colorants, directly determining “how much is needed to achieve the target color,” thereby affecting cost and formulation space. Many colorant problems have their roots in cognition and measurement deviations of tinting strength—for example, for the same nominal red, one […]
Compliance & Certification | Technical Application Industrial coatings and food packaging are the two scenarios with the greatest differences in compliance requirements for colorant applications: the former looks at China’s Environmental Labeling (Ten-Ring) and VOC limits, while the latter looks at food contact regulations such as FDA and EC 1935/2004. The same colorant manufacturer faces […]
Modern Paint & Coating | Technical Application Viscosity is the core characterization of the rheological behavior of water-based colorants and runs through the entire chain of production, pumping, metering, mixing, and application. Water-based colorants are mostly pseudoplastic fluids (shear-thinning), and viscosity changes with shear rate—this is both an application advantage and a control difficulty. Abnormal […]