The recent webinar organised by SSIP on the theme “Innovations in eco-sustainable liming”, a moment of study on a crucial phase of the tanning process such as hair removal has aroused great interest.
The webinar was introduced by director Edoardo Imperiale who recalled SSIP’s commitment to innovation and sustainability, announcing that a new department on tanning biotechnology has just been opened inside the Leather Research Institute.The in-depth study of the subject matter was therefore developed by Marco Nogarole, Technical and Business Services Manager of the District of Arzignano of SSIP, who exhibited his scientific contribution on the field of depilative liming.
Currently, most industries use the reductive sulfide hair removal method, which if on the one hand is reliable and effective, on the other it is known to be rather impacting on an environmental level, both for the fumes released into the air, due to the toxic fumes produced by hydrogen sulphide, both for the large production of non-recoverable waste.
The objective of the study presented is to find an alternative solution to overcome these drawbacks, as well as to arrange a non-destructive depilative process that allows for less swelling, avoid descaling, which does not require special dedicated environments, and which allows to recover and reuse non-hydrolysed and therefore still intact hair.
Marco Nogarole studied in-depth hair removal with recovery, scientifically explaining how this affects the part of the hair follicle up to the bulb and the Malpighian layer of junction between the dermis and epidermis, the pre-keratin zone. The expert exposed the different techniques and experiments of oxidative hair removal, focusing on that with sodium percarbonate which is currently the technique that manages to act with low pH, without the need to add sodium hydroxide and with the advantage of not producing exothermic and corrosion. He then studied the role of the TAED activator, which guarantees greater efficacy and chemical stability to the process, albeit at an affordable price and greater biodegradability. In conclusion, he brought several practical examples and exposed the possible advantages and uses of the hair recovered after depilation, which becomes no longer an industrial waste, but a useful animal by-product recoverable in various and multiple applications.