TITLE:
Light-Dependent Properties of Finishing and Leather Defects
AUTHORS:
Claudia Florio, Gianluigi Calvanese
KEYWORDS:
Finishing, Pigments, Powder Pigments, Stains, UV-Visible Light-Assisted Chemical Modifications, Surface Optical Properties, Leather Defects, Leather Functionalization, Antioxidants Modifications
JOURNAL NAME:
Advances in Materials Physics and Chemistry,
Vol.11 No.12,
December
29,
2021
ABSTRACT: The uniformity of the colour in leathers for the furnishing andautomotivesectors is a particularly important feature, especially for white or light-colouredarticles, intended to the high-end market; on these articles any colour alteration can be very visible and unpleasant, with possible technical and economic consequences for the producers. In a previous study, we analysed the possible causes behind the formation of some peculiar pink/salmon stains on different kinds of white/beige/light-coloured leather furnishing items, where we focalized our attention on TiO2properties and its possible interaction with some organic-based antioxidants. In recent years, due to many other similar cases of defectsthatoccurred to tanners and to upholstery traders, we decided to enhance the investigations concerning this topic. More in detail we analysed, defective leathers, powder pigments and chemicals, in order to identify the possible role of some substances in this issue, with particular reference to some antioxidants and aluminosilicates, where several diagnostic techniques have been utilised, as ATR-IR (Attenuated Total Reflectance IR Spectroscopy), SEM-EDX (Scanning Electron Microscopy-Energy Dispersive X-ray Analysis), XRF (X-ray Fluorescence spectrometry),GC-MS (Gas Chromatography-Mass Spectrometry), and DSC/TGA (Differential scanning calorimetry/Thermogravimetry) equipment.