Despite having the same conditions as summer, the drying is poor. This explains how to review solvent selection and curing time during temperature drops.
Even though I painted under the same conditions as in summer, the drying has become poor. What has changed is not the paint, but the temperature. ────────────── ■Cause of Occurrence The evaporation rate of thinner varies greatly with temperature. Using slow-drying thinner intended for summer in the autumn and beyond prevents the solvent from fully evaporating. ■The Truth When the temperature drops by 10 degrees, the evaporation time of the solvent roughly doubles. The remaining solvent escapes from the inside during curing, creating voids and pinholes. The surface may dry, but the interior remains uncured, leading to issues in the next process. ■Improvement Measures Determine and display the brand and dilution ratio of thinner for each temperature range. Ensure adequate setting time and fully remove the solvent before curing. Please utilize the seasonal thinner selection chart.
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Construction method: Solvent-baked painting / Thinner: Use fast-drying, standard, and slow-drying according to temperature zones / Setting: Ensure solvent removal time before baking / Baking temperature: 140-200 degrees / Film thickness: 20-40 microns
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General parts for solvent-baked painting, such as automotive parts, industrial machinery parts, and sheet metal covers. We have a track record of establishing dilution standards by temperature range as a measure against poor drying that occurs during seasonal changes.
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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.
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