Yuzu skin undulates like the peel of a mandarin orange. Smoothness is stabilized by three conditions: viscosity, film thickness, and gun distance, along with seasonal thinner selection.
The finish waves like the skin of a mandarin orange. If it reoccurs in the next batch even after polishing, the cause is the painting conditions. The texture of a yuzu skin changes with a 5-second difference in paint viscosity. ────────────── ■ Cause of Occurrence If the paint's flow time is insufficient, fine unevenness remains during curing. This often occurs when there is insufficient dilution, inadequate film thickness, or if the spray gun distance is too far. ■ Truth As the temperature rises, the evaporation of the thinner accelerates, and even with the same mixture, it does not flow after application. In summer, the same viscosity settings as in winter lead to a sharp increase in yuzu skin texture. ■ Improvement Measures Use slow-drying thinners according to temperature ranges and measure viscosity with a Ford cup each time. Maintaining a gun distance of 20-25 centimeters and a film thickness of 25-35 microns stabilizes smoothness. Please utilize the materials summarizing viscosity management standards by season.
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Corresponding materials: Iron / Stainless steel / Aluminum / Aluminum die casting / Zinc die casting / Film thickness management: 25-35 microns (design surface) / Viscosity management: Measured for each lot with Ford cup No. 4 / Monthly production of 300,000 units, 100 types, 30 colors / ISO 9001 certification obtained.
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Design surface painting for home appliance exteriors, OA equipment enclosures, automotive interior parts, fixtures, and industrial machine covers. Supports requirements for glossy surfaces and smoothness in dark colors.
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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.
