{"id":59751,"date":"2026-04-20T16:04:46","date_gmt":"2026-04-20T14:04:46","guid":{"rendered":"https:\/\/eurotherm.eu\/?p=59751"},"modified":"2026-04-20T16:04:53","modified_gmt":"2026-04-20T14:04:53","slug":"matt-coating-the-loss-of-gloss-in-industrial-painting","status":"publish","type":"post","link":"https:\/\/eurotherm.eu\/en\/matt-coating-the-loss-of-gloss-in-industrial-painting\/","title":{"rendered":"Matt coating: the loss of gloss in industrial painting"},"content":{"rendered":"\n\n
\n
\n
\n \n
\n \n
\n

\n Impact of matte painting in industrial processes <\/h2>\n <\/div>\n <\/div>\n\n
\n
\n
\n

Unwanted dulling in industrial painting is an aesthetic and functional anomaly that manifests itself as a loss of gloss or the appearance of diffuse halos on the treated surface.<\/p>\n<\/h3>\n <\/div>\n <\/div>\n

\n
\n

This phenomenon is not only a visual problem but often indicates a non-durable paint that compromises the long-term protection of the metal substrate. In the high-quality industrial finishing industry, problems with paint durability are frequently attributable to incorrect management of the curing stage<\/a> or an imbalance in the environmental conditions of the department. <\/p>\n

The formation of an unintentional matte finish signals a deviation from optimal technical parameters throughout the production cycle. From proper chemical preparation of the part to millimeter control of temperature in the furnaces, each step must be calibrated to ensure stability. Addressing this critical issue requires a systemic analysis of the plant, aimed at neutralizing the variables that interfere with the proper formation of the protective film. <\/p>\n <\/div>\n <\/div>\n \n <\/div>\n\n <\/div>\n <\/div>\n <\/div>\n<\/section>\n\n\n

\n
\n
\n \n
\n \n
\n

\n Causes of matte painting in industrial painting <\/h2>\n <\/div>\n <\/div>\n\n
\n
\n
\n

Gloss loss is generally the result of an imbalance between multiple process variables that influence film formation.<\/p>\n<\/h3>\n <\/div>\n <\/div>\n

\n
\n

Specifically, the main causes in industrial painting <\/a>are attributable to suboptimal management of the temperature curve, application parameters inconsistent with the characteristics of the paint product, unstable environmental conditions, and the quality or state of preservation of the materials used.<\/p>\n

When these factors are not properly controlled, the film fails to spread evenly before the consolidation stage, generating an irregular surface microstructure that scatters light instead of reflecting it specularly. This phenomenon leads to the formation of an undesirable matte finish and, in the most critical cases, a reduction in the protective performance of the coating. <\/p>\n <\/div>\n <\/div>\n \n

\n
\n

Diagnosis of matte finish: how to identify the causes<\/h3>\n

Correct analysis of the opacity defect enables rapid tracing of the responsible process variable, reducing intervention time and production waste. Diffuse and uniform opacity is generally associated with thermal management problems or incomplete film cure. <\/p>\n

In contrast, a localized opacity tends to indicate surface contamination or criticality in substrate pretreatment<\/a>. <\/strong>When the surface appears dull and grainy, the cause can often be traced to poor film release due to incorrect atomization parameters or inadequate viscosity. Finally, variations in gloss between different production batches signal instabilities in oven parameters or environmental process conditions. <\/p>\n

For this reason, diagnosis must be supported by continuous and structured monitoring<\/a> of operational parameters so as to ensure repeatability, quality control and stability over time.<\/p>\n <\/div>\n <\/div>\n <\/div>\n\n <\/div>\n <\/div>\n <\/div>\n<\/section>\n\n\n

\n
\n
\n \n
\n \n
\n

\n Gloss problems in powder coating: heating and curing <\/h2>\n <\/div>\n <\/div>\n\n
\n
\n
\n

In powder coating, gloss is determined by the dynamics of melting the plastic granules inside curing ovens, where heat must promote continuous melting.<\/p>\n<\/h3>\n <\/div>\n <\/div>\n

\n
\n

Major critical issues arise from inaccurate management of applied thicknesses, which generates local variations in light reflection on the surface of the part. Uneven heat distribution in thepowder coating plant<\/a> ‘s baking tunnel prevents resins from reaching the ideal fluid state necessary for a glossy finish. <\/p>\n

If the powder does not flow sufficiently before curing, it will create a dull, grainy surface texture. Using powders degraded by wet storage or excessive pneumatic recovery compromises the material’s ability to relax. Incorrect electrostatic charge parameters cause uneven deposition that results in diffuse opacity that is difficult to correct in post-production. Paint durability problems also emerge when the cross-linking temperature is not maintained for the required time making the paint not resistant to external agents. Too rapid cooling at the exit of the oven can, in addition, cause thermal shocks that alter the molecular structure of the coating and its final gloss. <\/p>\n <\/div>\n <\/div>\n \n <\/div>\n\n <\/div>\n <\/div>\n <\/div>\n<\/section>\n\n\n

\n
\n
\n \n
\n \n
\n

\n Matt finish in liquid coating: evaporation and chemical interactions <\/h2>\n <\/div>\n <\/div>\n\n
\n
\n
\n

In liquid paint systems, the degree of gloss depends on the ability of the resins to level out perfectly after spray application, before chemical consolidation begins.<\/p>\n<\/h3>\n <\/div>\n <\/div>\n

\n
\n

If solvents evaporate unevenly, the surface takes on a micro-rugosity that scatters light unevenly, resulting in the matte effect.
\nThe main causes include:<\/p>\n