Knowledge of Conservation and Restoration

New Strategies in the Conservation of Cultural Heritage from Biodeterioration

Parisa Mohammadi

Microbial colonization of cultural heritage objects is inevitable. Microorganisms cause physical, chemical, and aesthetic alteration in valuable works of art, leading to the loss of both financial and cultural value. To prevent and control microbial colonization and their growths, physical, chemical, and biological methods are used. However, physicochemical methods are often ineffective on treated works of art, and can be dangerous for people involved in the conservation process. Due to inherent characteristics, chemical compounds and biocides, they are hazardous for humans, animals, and the environment. Given the significant weaknesses of these conventional methods, new approaches are continuously being developed to reduce the negative impact of deteriogenic microorganisms. These new approaches are environmentally friendly, safe, low-cost and low-risk. However, more research is needed to monitor the safety and effectiveness of these approaches. The lack of simple, reliable and standard measurements remains a limitation in the selection of
effective treatments. Field experiments are necessary and useful for evaluating the effectiveness of these methods: however, their design and implementation face several challenges. Therefore, researchers are seeking to develop methods to investigate how these new approaches work. Laboratory model systems are tools for testing the efficacy of antimicrobial compounds before field application on art works. In this study, we will first review the types of biological control methods, and then introduce the new and environmentally friendly approaches, that have been developed in this field. Finally, we will discuss methods of testing the effectiveness of new strategies using laboratory model systems.

Investigation of Biological Contamination in the Documents of Imamzadeh Mohammad, Tafresh

Fezeh Rahimi

Biological contamination of paper artifacts is a significant threat, causing not only damage to the paper itself but also posing health risks to conservators and restorers who are in close contact with them. Therefore, identifying the type of contamination is crucial for effective preservation and restoration. This article focuses on identifying biological contamination in a collection of paper artifacts from the Imamzadeh Mohammad in Tafresh, Iran. Preliminary examinations revealed evidence of biological contamination, including stains resulting from biological activity. These stains are a consequence of biodeterioration, leading to a reduction in the structural and artistic quality of the artifacts. To investigate the biological contamination, samples were taken from areas suspected of contamination and cultured on Sabouraud dextrose agar (for fungal contamination) and nutrient agar (for bacterial contamination). After incubation, the grown colonies were examined and identified. The results of the identification of isolated fungal and bacterial showed contamination with various fungi, including Penicillium, Aspergillus, Cladosporium, and yeasts, as well as bacteria belonging to the Actinomycetes and Bacillus genus.

Studying and Investigating the Fungal Contamination and Determining the Acidity Level of the Manuscript Paper of the Bible Belonging to the Year 1150 AD

Nahid Fazaeli

Fungal contamination and increased acidity are the most fundamental factors contributing to the erosion and destruction of historical manuscripts, including the manuscript of the Bible from the year 1150 AD. This work is housed in the museum of Archbishop Ardak Manoukian of Hazrat Maryam Church in Tehran. It is regarded as a significant treasure of Armenian cultural and artistic heritage, as well as an integral part of the cultural identity of the Christian community. Given the importance of this topic, the main objective of this research is to investigate the extent of fungal damage and the acidity level of
the manuscript in question. This study is experimental in nature, consisting of laboratory investigations conducted over the span of one month in the laboratory of the Conservation and Restoration Faculty at Iran University of Art. To measure the acidity of the paper, a colorimetric method was employed following the standard of direct titration. Additionally, to assess fungal contamination, samples were cultured on Sabouraud Dextrose Agar Solid Medium, and a transmission polarizing microscope was utilized for examination. Chaetomium and Penicillium fungi were isolated from one of the eight samples tested, and an increase in acidity was observed in the manuscript's paper. Due to the complexities of technology, pathology, and environmental
sensitivity, this manuscript requires specific guidelines in museums and repositories to minimize fungal contamination and acidity levels in the paper.

The Role of HSE & Risk Management in Heritage Conservation

Seyed Ali Faregh

Cultural heritage, as a mirror of human ingenuity, reflects the diversity of human civilization and serves as a bridge between the past and present, shaping our collective understanding of our shared history. The protection and maintenance of this rich and valuable treasure is a vital responsibility that requires comprehensive and multilateral strategies, as well as the joint efforts of all relevant experts and specialists. In this context, the principles and practices
of health, safety, and environmental engineering (HSE) can significantly contribute to the protection of cultural assets and the individuals involved in their preservation. HSE engineering plays an essential role in risk assessment and management during restoration projects and develops specific safety practices and procedures for safeguarding cultural heritage. By implementing risk management strategies and taking appropriate measures, potential risks to cultural works can be mitigated to an acceptable level. In this article, after identifying and evaluating the threats facing cultural relics, the application of HSE engineering and risk management tools will be explained, along with innovative suggestions and strategies for ensuring the safety and protection
of these invaluable treasures.

Organization and Restoration the Qalamkar Fabrics of the Golestan Palace World Collection and Provide Solutions for the Preservation and Restoration of Historical Textiles

Azam Soheilipour

The Qajar-era Qalamkar cloths belonging to the Golestan Palace had been folded in wooden boxes in the warehouses for a long time. In alignment with the objective of preventing physical and biological damage to the fabrics, the process of organizing and restoring them was investigated. This was accomplished through library studies and the performance of necessary analyses, which will be explained quantitatively throughout the article. The
activities carried out to achieve the goals of the mentioned project are as follows: after photographing and documenting the fabrics, a technical and restoration certificate was prepared, and labels made from cotton fabric were sewn onto the cloth. Additionally, cleaning and dusting were performed, and the process of smoothing the folds was conducted to prevent deformation and physical damage at the fold points. Subsequently, the pH level was checked using pH meter strips. Fungal cultivation was carried out on Qalamkar works suspected of having fungi, and fungi cultivation was also performed in both the former and new storage areas. A fiber identification test was conducted to determine the type of fiber present. The results of the analyses indicate that the pH of the fabrics is within the neutral range. The fungal culture analysis revealed that Aspergillus niger grew on one of the fabrics and the door of a wooden box used for storage. Due to the presence of this type of fungus, periodic monitoring was recommended. The fiber identification analysis also confirmed that the fabric is made of cotton cellulose fiber. Finally, the Qalamkar fabrics were covered with cotton fabric and secured. Identification tags
were attached to the works, and with sufficient care and precision, they were transferred to the standard reservoir of Golestan Palace. Furthermore, protection and restoration solutions were provided to maintain the fabrics in the best possible condition.

Packing - Historical Objects for Museum Relocation (Yasuj Museum)

Peyman Nemati Morderaz

The structure of archeology museums is based on historical objects, in some cases making the need to relocation museum items a priority in museum operations. In such cases, the packing of museum objects becomes one of the most important parts of this moving process. The diversity of historical objects in terms of material, delicacy, form, aesthetic condition, size, weight, etc. significantly influences the of packaging methods. In addition to determining the appropriate packaging method, , the selection of materials and adherence to ergonomic principles and transportation standards are of utmost importance The main steps involved in this process include: matching museum objects with their recorded information before and after packing, photographing and documenting the artifacts, and selecting the most suitable packaging methods. For optimal packaging, it is essential to use high-quality materials as well as skilled personnel. Furthermore, environmental conditions such as tranquility, security, and cleanliness. should be taken into consideration for optimal packaging.

The Institutional Role of Museums in Conserving Cultural Heritage

Mohammad Hekmat

This essay examines the institutional role of museums in preserving cultural heritage. Focusing on the evolution of museology worldwide and local-cultural features as well, it demonstrates that the concept of conserving cultural heritage extends beyond the physical preservation and restoration of museum objects. Museums, as social institutions, have a broad responsibility to conserve the cultural and social values of artifacts. By emphasizing the importance of a holistic approach to cultural heritage, this essay shows that the preservation of a museum object is not limited to technical actions, but also includes understanding its cultural and social values, appropriate interpretation, and connection with the community. Moreover, the importance of education and public awareness about cultural heritage to create a sense of belonging and sustainable preservation is emphasized.