What causes the paint surface to feel rough on a cold morning? The temperature and viscosity of the paint.
Chilled paint becomes more viscous, the mist becomes coarse, and the painted surface becomes rough. This explains the management of paint storage temperature and viscosity that you may want to reconsider during the colder months.
Only the parts painted on a cold morning have a rough surface. Despite using the same paint and settings, the finish varies. 【First, please look here】 □ Paint applied first thing in the morning tends to be rough → Cold paint becomes more viscous, resulting in a coarser mist □ Using cans taken directly from the warehouse → The paint temperature remains lower than that of the painting area □ Measuring viscosity using the same standards as in summer → Even with the same timing, the paint's condition changes with temperature 【Why does this happen?】 When the temperature drops, paint becomes more viscous and spreads less evenly. If the mist is coarse when it adheres to the surface, it leaves a rough texture and unevenness. 【Countermeasures you can implement starting today】 1. Place the paint in the painting area the day before to equalize the temperature 2. Measure and record the temperature and viscosity of the paint before use 3. Reassess viscosity standards for each season 【Free Resource】 We have compiled the management standards for paint temperature and viscosity in the related catalog "Eiwa Kogei_Paint Quality Control Guidelines_Process Management Standards." You can download it for free from this page.
basic information
Defects: Roughness, citrus skin texture. Management items: Storage temperature of paint, temperature of paint before use, viscosity, viscosity standards for each season.
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Applications/Examples of results
Painting of metal parts with solvent-based paint, finishing of appearance parts. Review of painting conditions in winter, improvement of paint storage methods, training materials for new employees.
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We are not just a "subcontracted painting factory." Established in 1958, our company has a foundation of painting technology and also specializes in chemical treatment, stripping, and cleaning, functioning as the "external surface treatment department" in your organizational chart. Based on our philosophy of "preparation is eight-tenths of the work," we emphasize participation from the "upstream process" before the drawings are finalized. We conduct test painting on a wide range of metals and difficult materials, and we produce the entire process from assembly, packaging, to delivery, thereby reducing your management workload. Additionally, by being able to perform zinc phosphate treatment in-house, we achieve stable painting quality. Furthermore, our micro-heating stripping technology, which does not use chemicals, maintains the electrical state of the "jigs (hangers)" that influence painting quality. Our approach of "pre-treatment determines painting quality" ensures the stability of the paint film during mass production. Rather than simply "applying specified standards," we work backwards to achieve optimal painting specifications and prevent scratches during transportation, sparing no effort in thorough discussions from the outset. This diligent preparation is the shortest path to preventing rework and minimizing total costs. From the development stage, please utilize the expertise of our specialists as part of your production line.