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During research of creating better stainless steel surfaces for food processing using laser treatment, there was conclusion, that hydrophobic surfaces may have only limited use due to their high roughness, despite their water repelling effect. On other hand, polishing, that is used for centuries, makes surfaces very smooth, which has positive effect on hygiene of materials that are used in food protecting. In authors article about “Laser polished stainless steel use in food industry, a review” it was confirmed, that there is potential for researching laser polishing, that could be used for food processing materials.
By making different experiments with 20w Rofin infrared fiber laser, authors have achieved “polished effect” surface on regular rolled sheet AISI 316L stainless steel, that not only visually looks more reflective, but also has less roughness than original surface, which was proved by microscope examination. Such “Laser polished” surfaces could be used not only for processed, where less rough surfaces are required, but also for decorative purposes, making reflective non colored markings.