To extend the coating lifespan, it is essential to use Type 1 surface preparation (blast treatment) that can completely expose the metal surface, rather than Type 2 surface preparation.
**Differences Between Type 1 and Type 2 Keren in Paint Stripping** Paint stripping was performed using Type 1 and Type 2 Keren. When we magnify the surface after processing, there is a significant difference. [See image] What exactly is Keren? It is introduced in the link below: [What is Keren often heard in painting? Purpose and types] https://www.nc-net.or.jp/company/98405/product/detail/196279/ **About Keren Work** The most important aspect of painting is substrate preparation. Substrate preparation, also known as "Keren," can be divided into four types: Type 1 Keren to Type 4 Keren, depending on the work content and processing method. All methods aim to change the surface to a state more suitable for painting, but there is a significant difference in the finish between Type 1 Keren and Type 2 Keren, as shown in the photos. In metal painting, the lifespan of the paint is said to be around 10 to 50 years at most. What influences this paint lifespan is not the type or quality of the paint or the painting technique, but the processes before painting. The method of substrate preparation is the cause that affects paint lifespan. Type 1 Keren or Type 2 Keren accounts for about 50% of the difference in paint lifespan.
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**Type 1 Surface Preparation** This is performed using a blast treatment that grinds the surface by colliding abrasive materials at high speed. It is necessary to remove 95-99% or more of the foreign substances adhering to the surface, such as rust, oxide films, and paint films (active films). Type 1 surface preparation corresponds to the following standards in "ISO" and "SSPC": ISO Standard ISO-Sa3 / ISO-Sa2.5 SSPC Standard SSPC-SP5 / SSPC-SP10 Since it can completely expose the metal surface, it is the most effective treatment method. Products with paint defects can also be perfectly stripped of paint using blasting, allowing them to be repainted to a condition comparable to new. **Type 2 Surface Preparation** This is performed using power tools such as grinders or wire wheels. It is a method that removes only the dead film and rust adhering to the surface. It is mainly carried out manually in situations where blast treatment is difficult. Type 2 surface preparation corresponds to the following standards in "ISO" and "SSPC": ISO Standard ISO-St3 SSPC Standard SSPC-SP3 Since it is difficult to completely remove rust or paint films, the metal surface is exposed as much as possible.
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Turning your troubles into good experiences. We respond to such customer requests. From "nothing" to "something." Creating "one-of-a-kind" instead of "mass production." At Harada Iron Works, we strive to fulfill your desires. To meet the diverse needs of our customers, we provide a consistent production service from material procurement to painting and installation, helping to shorten delivery times and reduce total costs. With over 70 years of experience, we are committed to providing even greater "high added value" to our products through the skills and know-how we have honed over the years. If you have any inquiries regarding production or painting, please feel free to contact us. We look forward to hearing from you. For anything related to blasting and painting, leave it to us. Harada Iron Works Co., Ltd. Hiroshima TEL: 082-232-2445 FAX: 082-293-0286 Contact: Tao Mobile: 090-3742-9768 Email: bousei@harada-tekkou.co.jp Please feel free to reach out for consultations or estimates.
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Our company manufactures products tailored to the diverse needs of various sites. We respond to customer requests with our capabilities, excellent location, and thorough quality and delivery management. You can trust us with everything from material ordering to can manufacturing, processing, surface preparation, and painting. Additionally, we have dedicated many years to research and development in rust prevention, and we possess solid technology and equipment as a "rust prevention department," also handling tasks such as paint stripping. Please feel free to contact us with any inquiries.