Use of plant extracts for finishing natural leather

Currently, the use of synthetic dyes in the finishing process of leather products causes environmental problems. The aim of this work is to use environmentally friendly plant extracts for finishing natural sheepskin leather as a solution to this problem. The finishing process uses extracts of oak bark (Cortex Quercus), agrimony (Agrimonia eupatoria L.), horse chestnut (Aesculus hippocastanum), and «Aquanat Chlorophyll» as a natural dye. The use of plant extracts in the leather industry helps to reduce the amount of chemicals in the finished leather and has a positive impact on the environment. The article describes methods for obtaining natural extracts from these plants and the technology for their use in the processing of raw leather. Plant extracts are a renewable resource. The use of tannin rich plant extracts provides a sustainable and environmentally responsible alternative in leather production. Plant extracts have antimicrobial properties, promote the removal of formaldehyde and can be used as natural dyes in leather processing. In this regard, there is a need to use environmentally friendly plant extracts in leather production, which allows solving the tasks of the «green economy» in terms of environmental protection. Chrome-tanned leather from small ruminant hides, manufactured at the «Taraz Leather Factory» LLP, was used as the object of research.

1. Kudabaeva A., Abzalbekuly B. Otsenka vliyaniya tekhnologii proizvodstva perchatotochnykh i galantereinykh kozh na okruzhayushchuyu sredu [Assessment of the Environmental Impact of Glove and Leather Goods Production Technologies] // Kozha i obuv’. – 2021. – Vol. 21. – pp. 27–34. (in Russian).

2. Q. Bektaev, B. Abzalbekuly, G.T. Oraz. Tekstil materialdaryn ärleuge Qazaqstannyñ oñtüstik öñirlerinde ösetin jüzgin ösimdigin qoldanu [Using the Tamyryk Plant Growing in Southern Kazakhstan for Textile Finishing] // Vestnik Almatinskogo tekhnologicheskogo universiteta. – 2025. – №3. – pp. 223–230. (in Kazakh).

3. Wild C., Weiderpass E., Stewart B.W. Mezhdunarodnoe agentstvo po izucheniyu raka (red.) [International Agency for Research on Cancer (Ed.)]. – Lyon: IARC, 2020. (in Russian).

4. Ganesan Krishnamoorthy, Sayeed Sadulla, Praveen Kumar Sehgal, Asit Baran Mandal. Greener approach to leather tanning process: d-Lysine aldehyde as novel tanning agent for chrome-free tanning // Journal of Cleaner Production. – 2013. (in English).

5. Venkatasubramanian Sivakumar, J. Lakshmi Anna, J. Vijayeeswarri, G. Swaminathan. Ultrasound-assisted enhancement in natural dye extraction from beetroot for industrial applications and natural dyeing of leather // Ultrasonics Sonochemistry. – 2009. (in English).

6. Mirzamuratova R., Bayramoglu E., Abzalbekuly B., Kaldybayev R. Investigation of the Effect of a Natural Extract from Oak Bark on the Properties of the Leather// Fibres & Textiles in Eastern Europe. – 2024. – Vol. 32(1). – pp. 83–89. (in English).

7. Sabyrkhanova S.S., Behzat O.B., Yeldiyar G.K., Bitlisli B.O. Investigation of dyeing, antibacterial and antifungal properties of blended fabrics treated with plant-based dyestuffs and mordants as shoe materials // Coloration Technology. – 2024. – Vol. 140(4). – pp. 598–611. (in English).

8. Patent №37288. Byalğaryny ärleu täsili [Method for Finishing Leather]. Kaldybaev R.T., Mirzhamuratova R.Sh., Bayramoglu E.E., Turganbaeva A.A., Abdikerimova G.I. Patent holder: M. Auezov atyndağy Oñtüstik Qazaqstan universiteti. Byul. №17, 25.04.2025. (in Kazakh).

9. Paidaly model’ №8461. Tüymeshéten sygyndysyn qoldanu arqyly ayaq kiimge arnalğan toqyma materialyn mikrobgа qarsy ärleu täsili [Method for Antimicrobial Finishing of Footwear Textile Materials Using Tansy Extract]. Patent holder: M. Auezov atyndağy Oñtüstik Qazaqstan universiteti. Byul. №39, 29.09.2023. (in Kazakh).

10. Sabyrkhanova S.S., Behzat O.B., Yeldiyar G.K. Dyeing the cotton with extract of onion peels, walnut shell and tansy // Izvestiya Vysshikh Uchebnykh Zavedenii. Tekhnologiya tekstil'noi promyshlennosti. – 2022. – pp. 212–217. (in English).

11. Quaratesi I., Ferrara V., Călinescu I., Chipurici P., Popa I., Carşote C., La Manna P., Badea E. Sustainable vegetable tanning: ultrasound-assisted tannin extraction of oak bark and analytical approaches to collagen–tannin interactions // International Journal of Biological Macromolecules. – 2025. (in English).

12. Bayramoglu E.E., Çivi S. Review of tannins currently used in the leather industry. Part 2: condensed tannins // The 10th International Conference on Advanced Materials and Systems. – 2024. (in English).

13. Akhmadzhanova Kh.N. Rastitel’nye ekstrakty chasto soderzhat flavonoidy [Plant Extracts Often Contain Flavonoids] // Central Asian Journal of Education and Innovation. – 2023. (in Russian).

14. Bayramoglu E.E., Çivi S. Review of tannins currently used in the leather industry. Part 1: hydrolysable tannins. – (in English).

15. OOO «KorolëvFarm». Metod opredeleniia soderzhaniia flavonoidov v sisteme kontrolia kachestva [Method for Determining the Content of Flavonoids in the Quality Control System]. 2020. (in Russian)

16. Mirzhamuratova R.Sh., Bairamoglu E., Kaldybaev T. Tabığıi boiagysh­tardyñ bylğarynyñ beriktіlіk shamasynda äseri [Effect of Natural Dyes on the Strength of Leather]. Almaty teknologialyq universitetіnіñ habarshysy, 2024, №4, pp. 186–192. (in Kazakh)

17. Makovetskaia E.P., Rasheva O.A. Primenenie taninovykh protrave v natural’nom krashenii [Use of Tannin Mordants in Natural Dyeing]. 2018. (in Russian)

18. Koroliuk E.A. Krasil’nye rastenia Altaia i sopredel’nykh territorii [Dye Plants of Altai and Adjacent Territories]. 2015. (in Russian)

19. Kurkin V.A., Belov P.V. Flavonoidy pochek kashtana konskogo obyknovennogo (Aesculus hippocastanum L.) [Flavonoids of the Buds of Horse Chestnut (Aesculus hippocastanum L.)]. 2020. (in Russian)