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According to the long-term plan accepted by the Editorial Board, in the middle of October 2019 we present to our readers the 61st issue of the Polish Journal of Commodity Science. All the papers are published in English and each paper contains a wide summary in Polish and English. The summaries in both language versions of all the works published one can find on our web page Moreover, at the web page an open-access to all the papers published up to 2018 is offered. A series of 8 articles in the current issue of our journal is opened with a review paper by Wójcicki, presenting the latest literature on infrared spectroscopy and the possibility of its application in assessing the quality of alcoholic beverages. The work draws attention to the fact that the quality of alcoholic beverages is the result of numerous operations and technological processes, each of which has an impact on the quality of the final product. On the other hand, producers of alcoholic beverages are interested in using a simple, fast, objective and non-destructive method of assessing the quality of products from this group. The author draws attention to the huge potential of vibration spectroscopy in both near and basic infrared, which has been significantly increased due to the numerous applications in the field of constantly improving measuring devices as well as the application of chemometric methods. These methods in relation to selected groups of alcohol products are illustrated in the article with the results of the author's research. In the next paper, Kozak and Tichoniuk present the issue of quality in relation to the limited durability of durable products. The latest requirements for newly launched household appliances such as refrigerators, washing machines and washer dryers, dishwashers, electronic displays, light sources, external power supplies, electric motors, sales refrigerators, power transformers and equipment welding are discussed. The authors discuss energy efficiency strategies and eco-friendly design that have been proposed by the European Union. Moreover, a strategy of deliberate aging of the products that seems to be one of the causes of some problems related to the quality of this product group was presented. A very rapid technological progress contributes to the emergence of the next generations of electrical and electronic equipment on the market. This results in serious environmental problems. The constantly growing stream of this waste requires determining the possibilities of managing and their implementation. This problem is the subject of research presented in Cieszyńska's work. The author draws attention to the fact that waste electronic and electrical equipment (WEEE) is a valuable source of precious metals such as palladium, platinum and gold, which determines the value of electronic scrap and is the main economic factor in the recycling of electronic waste. The author presents information on the size of global WEEE generation and management as well as sales of new electrical equipment and electronics in the world. The study found that at the current growth rate of e-waste, their total volume in 2021 will be about 52 million tons. Hence, there is a need to quickly implement new efficient recovery methods for at least precious metals. 

An important parameter characterizing the applicability of surfactants in aqueous solutions is the Krafft point. This value is determined by the temperature above which the solubility of a given surfactant in water increases rapidly. This information is required to design
a high-quality compositions of new home detergents, shampoos and cosmetic products in which a given surfactant can be used as the active ingredient. In the next paper, Zieliński presents the results of his research on the possibility of calculating the Krafft point value for cationic and amphoteric surfactants in aqueous solutions on the basis of their chemical structure. The paper presents a set of 24 groups developed by the author to calculate the Krafft point value for these groups of surfactants in aqueous solutions with a maximum error of 4.4°C and a mean square error of 2.5°C. Improper skin care may lead to skin irritation and even the appearance of skin diseases or their increasing severity. A typical example is atopic dermatitis, which is one of the most important and current problems in Poland. A common feature of all patients with atopic dermatitis is severe itching and dry skin, hence the need to develop new recipes containing appropriate emollients. The subject of research described in the article by Klimaszewska et al. is the possibility of applying as an emollient Chia oil for the production of body lotions for atopic skin. The authors discuss the results of a series of prototype body lotions differing in the mass ratio of Chia oil to the commonly used emollient - caprylic-capric triglyceride. It has been observed that with an increase in the concentration of Chia oil to 6%, the values of viscosity, flow limit, adhesion strength and hardness increase, while further increase in the concentration of this Chia oil leads to a decrease in the values of the tested parameters, which may translate into easier application of these lotions on the skin. It was also found that an increase in the concentration of Chia oil in lotions led to a significant increase in skin hydration and a decrease in transepidermal water loss. Looking for new recipe proposals for mild cosmetics, shampoo manufacturers offer a group of products known as “micellar shampoos”. The formulation of such products is mainly based on a combination of mild effects on the skin and hair with a sufficiently strong cleansing effect. Zięba and Tomczak discuss the constitution of micellar shampoos and present the results of their research on the comparison of the functional and physicochemical properties of classic shampoos and micellar shampoos produced in laboratory conditions. Similar functional properties of these two product groups have been demonstrated. In the next paper Malinowska discusses the results of an analysis of the Polish market supply of vascular skin dermocosmetics. The purpose of research conducted in Poznań pharmacies in 2018 was to estimate the type of physicochemical forms of these products and to determine the active ingredients used. According to the author, the most numerous group of dermocosmetics for vascular skin care are everyday care products, such as day and night creams, toning creams and gels. Among them, the main positions are taken by creams with moisturizing, protective, soothing, soothing, reducing redness, strengthening, thermoregulatory and anti-wrinkle properties. 70 individual active ingredients as well as 68 mineral raw materials, fungi, algae as well as extracts and fats of plant origin have been identified in dermocosmetics available on the market. The author states that the active ingredients present in dermocosmetics available on the market most often have antimicrobial, anti-inflammatory, antioxidant, regenerating, capillary, anti-swelling, emollient, soothing and moisturizing properties. In the last article of the current issue of the journal Ogorzałek, Klimaszewska and Wasilewski present the results of own research on the possibilities of improving the safety of 

fabric softeners. The authors assumed that plant materials included in the recipes of these products will have a beneficial effect on the condition of the skin after the rinsing process and that they can also act as natural dyes. The paper discusses the results of functional tests of newly developed safe liquids for rinsing delicate fabrics using plant extracts. Extracts from sage, nettle, calendula and hop cones were used in these preparations. It has been found that the use of plant extracts in new formulations increases the degree of skin hydration and reduces transepidermal water loss after the rinsing process. The sixty-first issue of our quarterly closes with the column “TPJ Announcements”. It contains the first information about next year's 22nd international commodity science conference held under the auspices of IGWT, which will take place on September 14–18, 2020 in Bratislava and Piestany (Slovakia).

I wish you a nice reading

PJCS Editor Prof. dr hab. inż. Ryszard Zieliński







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