Microscopic and Microspectrophotometric Evaluation of Colour Changes in Cotton Fibres Exposed to Natural and Artificial Solar Radiation: Forensic Implications.
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| Title: | Microscopic and Microspectrophotometric Evaluation of Colour Changes in Cotton Fibres Exposed to Natural and Artificial Solar Radiation: Forensic Implications. |
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| Authors: | Wąs-Gubała, Jolanta1 (AUTHOR) jwas@ies.gov.pl, Sarnowska, Weronika2 (AUTHOR), Feigel, Bartłomiej1,3 (AUTHOR) |
| Source: | Polymers (20734360). May2026, Vol. 18 Issue 10, p1178. 14p. |
| Subjects: | Cotton fibers, Solar radiation, Photodegradation, Ultraviolet-visible spectroscopy, Color variation (Biology), Microscopy, Forensic sciences, Luminescence |
| Abstract: | The objective of this study was to evaluate colour changes in cotton fibres within knitted fabric structures under different light exposure conditions and to assess the applicability of forensic analytical methods for this purpose. Fabrics of three distinct colours were exposed to two types of irradiation: natural sunlight and artificial light in a controlled climatic chamber. A multi-scale analytical approach was applied, including visual inspection and stereomicroscopy for macro-level evaluation, followed by bright-field microscopy, fluorescence microscopy, and UV–Vis microspectrophotometry for single-fibre characterisation. Visual assessment of fabrics revealed perceptible colour differences between exposed and unexposed samples, whereas stereomicroscopy did not consistently enhance the detection of these alterations. Bright-field and fluorescence microscopy showed no visually perceptible differences between fibres from exposed and unexposed fabrics of the same colour. Microspectrophotometric measurements did not reliably capture colour changes in single cotton fibres, particularly in samples exposed to natural sunlight. Furthermore, total colour difference (ΔE) values, ranging from 0.248 to 6.652, were found to be unreliable at the single-fibre level due to significant spatial variability across different measurement sites. The findings indicate that, while light exposure may induce perceptible colour alterations in cotton knitted fabrics, the forensic examination of single fibres does not necessarily reflect these macro-scale changes. From a forensic perspective, the stability of microscopic and microspectrophotometric characteristics supports reliable fibre comparison, even after post-event exposure to sunlight. [ABSTRACT FROM AUTHOR] |
| Copyright of Polymers (20734360) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 194117779 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Microscopic and Microspectrophotometric Evaluation of Colour Changes in Cotton Fibres Exposed to Natural and Artificial Solar Radiation: Forensic Implications. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Wąs-Gubała%2C+Jolanta%22">Wąs-Gubała, Jolanta</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> jwas@ies.gov.pl</i><br /><searchLink fieldCode="AR" term="%22Sarnowska%2C+Weronika%22">Sarnowska, Weronika</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Feigel%2C+Bartłomiej%22">Feigel, Bartłomiej</searchLink><relatesTo>1,3</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Polymers+%2820734360%29%22">Polymers (20734360)</searchLink>. May2026, Vol. 18 Issue 10, p1178. 14p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Cotton+fibers%22">Cotton fibers</searchLink><br /><searchLink fieldCode="DE" term="%22Solar+radiation%22">Solar radiation</searchLink><br /><searchLink fieldCode="DE" term="%22Photodegradation%22">Photodegradation</searchLink><br /><searchLink fieldCode="DE" term="%22Ultraviolet-visible+spectroscopy%22">Ultraviolet-visible spectroscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Color+variation+%28Biology%29%22">Color variation (Biology)</searchLink><br /><searchLink fieldCode="DE" term="%22Microscopy%22">Microscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Forensic+sciences%22">Forensic sciences</searchLink><br /><searchLink fieldCode="DE" term="%22Luminescence%22">Luminescence</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The objective of this study was to evaluate colour changes in cotton fibres within knitted fabric structures under different light exposure conditions and to assess the applicability of forensic analytical methods for this purpose. Fabrics of three distinct colours were exposed to two types of irradiation: natural sunlight and artificial light in a controlled climatic chamber. A multi-scale analytical approach was applied, including visual inspection and stereomicroscopy for macro-level evaluation, followed by bright-field microscopy, fluorescence microscopy, and UV–Vis microspectrophotometry for single-fibre characterisation. Visual assessment of fabrics revealed perceptible colour differences between exposed and unexposed samples, whereas stereomicroscopy did not consistently enhance the detection of these alterations. Bright-field and fluorescence microscopy showed no visually perceptible differences between fibres from exposed and unexposed fabrics of the same colour. Microspectrophotometric measurements did not reliably capture colour changes in single cotton fibres, particularly in samples exposed to natural sunlight. Furthermore, total colour difference (ΔE) values, ranging from 0.248 to 6.652, were found to be unreliable at the single-fibre level due to significant spatial variability across different measurement sites. The findings indicate that, while light exposure may induce perceptible colour alterations in cotton knitted fabrics, the forensic examination of single fibres does not necessarily reflect these macro-scale changes. From a forensic perspective, the stability of microscopic and microspectrophotometric characteristics supports reliable fibre comparison, even after post-event exposure to sunlight. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Polymers (20734360) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.3390/polym18101178 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 14 StartPage: 1178 Subjects: – SubjectFull: Cotton fibers Type: general – SubjectFull: Solar radiation Type: general – SubjectFull: Photodegradation Type: general – SubjectFull: Ultraviolet-visible spectroscopy Type: general – SubjectFull: Color variation (Biology) Type: general – SubjectFull: Microscopy Type: general – SubjectFull: Forensic sciences Type: general – SubjectFull: Luminescence Type: general Titles: – TitleFull: Microscopic and Microspectrophotometric Evaluation of Colour Changes in Cotton Fibres Exposed to Natural and Artificial Solar Radiation: Forensic Implications. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Wąs-Gubała, Jolanta – PersonEntity: Name: NameFull: Sarnowska, Weronika – PersonEntity: Name: NameFull: Feigel, Bartłomiej IsPartOfRelationships: – BibEntity: Dates: – D: 15 M: 05 Text: May2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 20734360 Numbering: – Type: volume Value: 18 – Type: issue Value: 10 Titles: – TitleFull: Polymers (20734360) Type: main |
| ResultId | 1 |
