"تقييم مواد التلوين وتأثيرها على الخواص الكيميائية والفيزيائية لألياف البردي الأثري بعد اجراء عمليات التقادم المعجل" | ||||
| مجلة العمارة والفنون والعلوم الإنسانية | ||||
| Articles in Press, Accepted Manuscript, Available Online from 27 August 2025 | ||||
| Document Type: المقالة الأصلية | ||||
| DOI: 10.21608/mjaf.2025.396394.3764 | ||||
 View on SCiNiTO | ||||
| Author | ||||
مروة رضا الزيني 
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| مدير قسم ترميم وصيانة المخطوطات بجمعية المكنز الإسلامي | ||||
| Abstract | ||||
| This study investigates the impact of various coloring media and aging processes on the structural, physical, and chemical properties of papyrus fibers. The research aims to understand how different pigments and binders influence the durability and integrity of ancient papyrus under simulated aging conditions, including thermal, humidity, and photochemical exposure. The coloring agents examined in this study include white, red, blue, green, and black, with particular emphasis on their effects on fiber strength, elasticity, and chemical stability. Results demonstrate that white and red colors exert moderate negative effects on the fibers, causing slight reductions in tensile strength and elongation. Conversely, blue and green pigments exhibit more pronounced detrimental effects, with blue, especially when combined with animal glue, causing the highest degree of fiber damage, chemical alteration, and morphological deterioration post-aging. The black color showed the least impact on the physical and chemical integrity of the fibers, suggesting it as a relatively more stable pigment under aging conditions. The influence of aging processes was thoroughly examined through tensile testing, colorimetric analysis, and morphological observations using Scanning Electron Microscopy (SEM). The findings reveal that thermal and humidity aging significantly diminish fiber strength and flexibility, with thermohygrometric aging exerting a more severe effect than photochemical aging alone. Color changes were assessed spectrophotometrically, confirming that blue and green pigments experienced the greatest colorimetric shifts, indicative of chemical degradation, while black pigments remained relatively stable. SEM analysis provided insights into the microstructural damage inflicted by aging. In particular, fibers treated with animal glue displayed the most substantial deterioration, characterized by fiber debonding, surface fractures, and increased porosity. These morphological changes correlate with mechanical property reductions and underline the importance of binder choice in conserving papyrus artifacts. Furthermore, the chemical analysis highlighted alterations in functional groups associated with cellulose degradation, notably reductions in oxygen-containing groups such as C-O-C linkages, signifying chemical breakdown during aging. The presence of colorants influenced the extent of chemical modifications, with red and blue pigments accelerating degradation processes. | ||||
| Keywords | ||||
| ألياف البردي; وسائط اللونية; الألوان; التغيرات الفيزيائية | ||||
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