Reject "orange peel" texture: Uneven surface after industrial paint spraying? These 4 reasons must be investigated!

Is your painted surface uneven like orange peel? This not only affects the appearance but also reduces protective performance. As a professional industrial paint manufacturer, we deeply analyze the four core factors that cause “orange peel” and provide on-site solutions. In industrial coating, we strive for a smooth and full paint film. However, many applicators encounter an embarrassing situation: after the paint film dries, the surface exhibits a pitted texture similar to orange peel, commonly known as the “orange peel” phenomenon. As an industrial paint manufacturer, we have summarized the four most common culprits on-site: 1. Improper Thinner Matching and Dosage This is the most common cause. Problem: If too little thinner is added, the paint viscosity is too high, and the atomized paint droplets cannot fully level on the substrate. Matching: Using a “fast-drying” thinner that evaporates too quickly causes the paint droplets to dry before they have a chance to spread. Solution: Strictly follow the manufacturer’s technical specifications (TDS) for the proportion of matching thinner. 2. Spray Gun Pressure and Atomization Effect The spray gun settings directly determine the fineness of the paint mist. Problem: Insufficient spraying pressure leads to poor paint atomization, resulting in large particles impacting the surface and preventing the formation of a smooth coating. Solution: Check the pressure gauge and adjust the spraying pressure according to the type of paint (usually between 0.3-0.5 MPa) to ensure uniform atomization. 3. Spraying Distance and Technique Problem: The spray gun is too far from the substrate. During the paint mist’s journey to the surface, a large amount of solvent evaporates, and by the time the paint droplets reach the surface, they are dry, sticky, and have lost their fluidity. Solution: Keep the spray gun perpendicular to the surface, maintaining a distance of 20-30 cm, and move it at a steady and even speed. 4. High Ambient Temperature Problem: Applying paint under direct sunlight or in high-temperature environments causes the paint film to dry too quickly, preventing the internal solvent from releasing smoothly and hindering leveling. Solution: Avoid applying paint during high-temperature periods or use a “slow-drying” thinner. Conclusion: The “orange peel” effect is not necessarily due to poor paint quality, but mostly due to errors in application parameters. By controlling the three key factors of viscosity, pressure, and distance, a mirror-like coating effect can be easily achieved. Related Readings: Solvent-based Coatings: A Perfect Fusion of Traditional Craftsmanship and Modern Innovation; Exploring the Art World of Crackle Paint: A Complete Guide from Application Techniques to Creative Applications; The Powerful Role and Professional Application Process of Floor Coatings; Analysis of the Process and Application of Spraying Non-ferrous Metallic Paint on Polished Stainless Steel Parts.