Keren refers to "the process of removing foreign substances attached to the surface of the object to be painted before painting." It is said to be derived from the English word "clean."
What is the process of Keren? Keren basically removes foreign substances by grinding or rubbing the surface. For example, it involves polishing the surface with sandpaper or a brush. Additionally, depending on the method of work, it is classified into four types known as Type 1 Keren to Type 4 Keren. What are the four types of Keren? Type 1 Keren... Blast method. A method that involves colliding abrasives at high speed against the surface for grinding. Type 2 Keren... Uses power tools. A method that involves rubbing the surface with tools like grinders. Type 3 Keren... Uses hand tools. A method that involves rubbing the surface with tools like wire brushes. Type 4 Keren... Uses hand tools. A simple cleaning and roughening method using sandpaper. Thus, the types are categorized by the method of work, and the degree of cleanliness is as follows: Cleanliness Low ➩➩➩➩➩➩➩➩➩➩➩➩➩➩ High Type 4 Keren Type 3 Keren Type 2 Keren Type 1 Keren [Difference between Type 1 Keren and Type 2 Keren in terms of stripping] https://www.nc-net.or.jp/company/98405/product/detail/186195/ Harada Iron Works possesses large equipment dedicated to the highest level of Keren, "Blast."
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The purpose of surface preparation is to "increase the adhesion of the paint by cleaning the surface, thereby prolonging the life of the coating." There are two reasons why surface preparation helps the paint last longer. 1. Since there are no foreign substances on the surface, the paint adheres firmly. If there are dust, dirt, rust, oil, or oxidation films left on the surface, they hinder the adhesion of the paint. It's like trying to stick tape on a dirty surface; it will peel off immediately. 2. The surface becomes uneven, which increases the adhesion of the paint. Surface preparation involves scraping or rubbing the surface. This creates fine irregularities on the surface, allowing the paint to penetrate and adhere strongly. Additionally, it improves the uniformity of the paint film, resulting in a more aesthetically pleasing finish. Thanks to these two points, the paint does not peel off, and the coating lasts longer. Surface preparation is a tedious task, and after painting, it can be hard to tell whether it was done or not. However, its effect is far greater than the "number of coats" or "types of paint." If it is not done, no matter how good the paint is or how many layers are applied, it won't make much difference. By performing surface preparation before painting, the paint can finally demonstrate its performance, protecting the object and enhancing its appearance.
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Turning your troubles into good experiences for our customers. We respond to such customer requests. From "nothing" to "something." Creating "one-of-a-kind" instead of "mass production." Harada Iron Works is dedicated to fulfilling those wishes. 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 questions about production or painting, please feel free to contact us. We look forward to hearing from you. For 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 contact us 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.