Even though I painted it neatly, the shape of my fingers is showing through. I will explain the mechanism of how the oil from the hands repels the paint film and the management of gloves.
After applying, the shape of the fingers has emerged. It is not dirt. It is a mark left by bare hands. ────────────── ■Cause of occurrence Human hands always have sebum and sweat. The oil on the material can be removed by degreasing, but if touched after degreasing, it will remain. ■Truth Even the sebum from one finger can cause the paint to repel in that area. Hand creams and silicone-based hair products repel particularly strongly. It is not visible immediately after drying, but it appears as a contour after curing. ■Improvement measures Always wear cotton gloves during the process after degreasing, and prohibit bare-hand work. Gloves absorb oil, so establish a replacement standard based on time or quantity. Please utilize the materials summarizing the handling standards after pretreatment.
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basic information
Corresponding materials: Iron, stainless steel, aluminum, aluminum die casting / Pre-treatment: Degreasing, water washing, zinc phosphate coating / Handling standards: Wear cotton gloves after degreasing / Film thickness: 20-40 microns / Curing temperature: 140-200 degrees
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Metallic baked coatings for parts requiring exterior quality, such as home appliance housings, OA equipment covers, store fixtures, and medical device components. We have established standards for glove changes as a measure against defects caused by hand contact.
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Company information
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.
