White ring stains left after cleaning. This explains how to prevent them before painting by managing water quality and drying time.
Even though it has been cleaned, white water stains remain. The culprit is the minerals contained in tap water. ────────────── ■ Cause of Occurrence Water stains are a phenomenon where minerals like calcium, which were dissolved in water droplets, remain and solidify as white marks when the droplets dry. If painted over as is, these will be trapped in the paint film as foreign substances, leading to peeling later on. ■ The Truth Wiping only spreads the water droplets, leaving the minerals on the surface. During warmer periods, the drying of water droplets is faster, making it easier for stains to set in. ■ Improvement Measures Switch the final rinse to pure water or deionized water. After cleaning, blow away the water droplets and ensure the time before moving to the drying oven is within 5 minutes. Please utilize the materials on the washing process and drying management.
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basic information
Washing: Compatible with pure water and ion-exchanged water / Drying: Dried in a drying oven after air blowing / Idle time: Transport within 5 minutes after cleaning / Pretreatment: Integrated degreasing and chemical treatment.
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Glossy finish design parts / Cleanliness requirement products for medical devices / Pre-treatment of aluminum and stainless steel
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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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