Poster Dresden, November 27-28, 2014 THE INVESTIGATION OF THE ULTRAVIOLET RESISTANCE OF SILK FABRICS DYED WITH NATURAL DYEING Nigar Merdan 1 , Filiz Akın 2 , Mehmet Kılınç 1 , Şeyda Canbolat 1 , Hale Gezer 3 1 Istanbul Commercial University, Faculty of Design and Engineering, Department of Textile Engineering, Kucukyali /Istanbul-Turkey 2 Abant Izzet Baysal University, Vocational High School, Bolu, Turkey 3 Marmara University, Faculty of Fine Arts, Department of Industrial Product Design/Istanbul-Turkey Abstract The textiles used in the interior architecture have allergic effects in order to consist of chemicals and synthetics. In this study, the silk fabrics were dyed with natural dyeing for use in the interior architecture because of being anti-allergic. After the dyeing process, the ultraviolet (UV) resistances of silk fabrics were investigated whether the samples used as a curtain. In conclusion, the UV protection factor of natural dye was investigated. Keywords: UV resistance, natural dyeing, interior architecture. Introduction Vegatable Dyes are produced from plant parts, such as leaves, flowers, cones, stem bark or lichen and algae .Vegatable Dyes are produced low chemical consumption.[1]. The use of vegetable and animal dyes goes back to the first centuries. The art of painting with dye plants is based on a very ancient period. The Chinese, and Chinese green vegetable called indigo dyes have been reported to dye silk fabrics BC, 2600 years ago [2]. At the same time the Chinese indigo and purple were used in Egyptian. That is understood from the excavations in Egypt [3]. The use of natural dyes decreased rapidly after the discovery of synthetic dyes in 1856 [4]. Natural dyes generally do not cause environmental pollution, when natural dyes compared with synthetic dyes. Natural dyes are less toxic and less allergenic. Because of these advantages the last decade, the use of natural dyes has gained momentum in the field food, pharmaceutical, cosmetics and textile dyeing industry [5]. Synthetic dyes are preferred due to ease of use, low cost and giving standart dyeing. However, synthetic dyes are not environmental friendly.The use of environmental friendly dyes increases due to the damages of synthetic dyes to human health. Some of textile dyes may negatively affect human health especially azo group containing dyes which include carcinogenic groups [6]. Most natural dyes have no affinity to fibers directly. Therefore, in order to connect the fibers of natural dyes are needed often mordant materials. Metal salts generally are used as mordant agents. Metal ions react with functional groups in the fibers to form a complex which connect to the fiber in water insoluble form.Selected mordant directly affects on the fastness, brightness and color properties of fiber [7]. The start of the industrial revolution in the world, the use of synthetic dyes in textile and food industry are bring about with many health problems. Therefore, in recent years, natural dyes studies are gaining momentum , that have been initiated to recover from the synthetic dyes damages.Natural dyes have a more matte color compared with synthetic dyes. Natural dyes have UV absorbing properties [8].On the other hand, synthetic dyes has wider price range and color palette. However, these dyes can cause damage in the human body, allergies, toxic waste. The lack of reproducibility in dyeing, inability to obtain uniform color and limited color fastness are the main problem of the natural dyes [9]. Plants used in natural dyeing have different chemical components, so natural dyes have different antibacterial effect and many different features [10]. In recent time most researches are about antioxidant group of natural dyes. Anthocyanins, catechins, tocopherols, sesamol, of sesamol, carnosic acid, rosmarinic acid, flavonoids, carotenoids and ascorbic acid are the most important antioxidant groups. Anthocyanin is a strong antioxidant flavonoid group and many vegetables and fruits such as grapes, strawberries, plums, apples, cherries, cabbage, beets and eggplant contain