Corresponding author: Ahmed G. Hassabo, Email: aga.hassabo@hotmail.com, Tel.: +20 110 22 555 13 (Received 08/11/2021, accepted 28/11/2021) DOI, 10.21608/jtcps.2021.105105.1092 ©2022 National Information and Documentation Centre (NIDOC) N owadays, there is a progressive increase in UV radiation on human skin caused by the depletion of the ozone in the earth’s atmosphere. As long-term exposure to UV light can result in a series of negative health effects. Ultraviolet radiation is harmful to human skin and causes a variety of skin illnesses, which is an increasing worry for people all over the globe. Developing textiles with UV protection functionality has been widely researched up to now. Nanotechnology has developed several approaches for introducing UV-protected fabric by using semiconductor metal oxides. Ultraviolet-resistant cotton fabrics were developed by coating with ZnO and TiO 2 nanoparticles to increase the ultraviolet protection factor (UPF) to the fabric. Keywords: UV radiation, Cotton fabric, UPF, Nanoparticles, UV absorbers. Ultarvielote Protection of Cellulosic Fabrics Ahmed. G. Hassabo 1* and Menna M. Ragab 2 , and Hanan A. Othman 2 1 National Research Centre (Scopus affliation ID 60014618), Textile Research Technology Institute, Pretreatment, and Finishing of Cellulose-based Textiles Department, 33 El-Behouth St. (former El-Tahrir str.), Dokki, P.O. 12622, Giza, 2 Textile Printing, Dyeing and Finishing Department, Faculty of Applied Arts, Benha University, Benha, Egypt Introduction All treatments which give the textiles the properties of fnal use are included in the term “fnishing” This may include visual, handling, and special features, including waterproofng and UV protection fnishing, and so on. [1-6] And it can be classifed into chemical and mechanical fnishing. Chemical fnishing can be defned as the use of chemicals to achieve the desired fabric property. It is also referred to as processes that change the chemical composition of the fabrics that they are applied to. [7-17] Signifcant attention has recently been paid to textiles made for protective garments, particularly ultraviolet (UV) radiation protection. UV protection fnishes are one of the most common chemicals fnishing agents used on textile materials to protect humans and textile materials from the damaging effects of UV radiation. [18] Long-term UV exposure may contribute to skin worsening like as a toxicity effect of the skin, skin ageing, skin photo dermatosis, phototaxic allergies, skin reddening, skin darkening, skin cancer risks, eye damage (corneal opacifcation) to the damages to DNA. Solar radiation reaching the surface of the earth consists of light waves with a total wavelength from infrared to UV, Although the intensity of Ultraviolet photons in higher regions is much less than the visible or infrared radiation in a visible feld, the energy per photon is considerably higher. [19] The very high energy absorbed by UV photons in the higher atmosphere, the direct damage caused by UV radiation to the human skin is a result of the wavelength of the radiation incident with the most damages caused by radiation below 300 nm. The actual skin danger wavelengths are 305–310 nm. The textiles supplied in the range of 300–320 nm must therefore be effective to shield the wearer from the UV sunlight. [18, 20] Physicists focused on the characteristics of the radiation have coined terminologies such as near UVs (290 - 400 nm), far UVs (180 – 290 nm), and vacuum vacuums (under 180 nm). The name UVA is between 320 and 400 nm, UVB is between UVC and UVA, from 290 to 320 nm, and UVC is below 290 nm, respectively. J. Text. Color. Polym. Sci., Vol. 19, No. 1, pp. 51-61 (2022) Journal of Textiles, Coloration and Polymer Science https://jtcps.journals.ekb.eg/ 6