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Evaluation of corrective measures implemented for the preventive conservation of fresco paintings in Ariadne's house (Pompeii, Italy).

Merello P, García-Diego FJ, Zarzo M - Chem Cent J (2013)

Bottom Line: Data recorded in 2008 and 2010 were compared.As a result, the daily thermohygrometric variations resulted less pronounced in 2010, with a reduction of approximately 4°C, which is favorable for the preservation of mural paintings.In the room with four walls, the daily fluctuations also decreased about 4°C.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Applied Physics (UD Agriculture Engineering), Universitat Politècnica de València, Camino de Vera s/n, Valencia, 46022, Spain. fjgarcid@upvnet.upv.es.

ABSTRACT

Background: A microclimate monitoring study was conducted in 2008 aimed at assessing the conservation risks affecting the valuable wall paintings decorating Ariadne's House (Pompeii, Italy). It was found that thermohygrometric conditions were very unfavorable for the conservation of frescoes. As a result, it was decided to implement corrective measures, and the transparent polycarbonate sheets covering three rooms (one of them delimited by four walls and the others composed of three walls) were replaced by opaque roofs. In order to examine the effectiveness of this measure, the same monitoring system comprised by 26 thermohygrometric probes was installed again in summer 2010. Data recorded in 2008 and 2010 were compared.

Results: Microclimate conditions were also monitored in a control room with the same roof in both years. The average temperature in this room was lower in 2010, and it was decided to consider a time frame of 18 summer days with the same mean temperature in both years. In the rooms with three walls, the statistical analysis revealed that the diurnal maximum temperature decreased about 3.5°C due to the roof change, and the minimum temperature increased 0.5°C. As a result, the daily thermohygrometric variations resulted less pronounced in 2010, with a reduction of approximately 4°C, which is favorable for the preservation of mural paintings. In the room with four walls, the daily fluctuations also decreased about 4°C. Based on the results, other alternative actions are discussed aimed at improving the conservation conditions of wall paintings.

Conclusions: The roof change has reduced the most unfavorable thermohygrometric conditions affecting the mural paintings, but additional actions should be adopted for a long term preservation of Pompeian frescoes.

No MeSH data available.


Related in: MedlinePlus

Daily variations of temperature for each room. Calculated as the difference between maximum and minimum temperatures recorded during the 18 days under study (filled triangles: 14–31 August 2008; crosses: 14–31 August 2010), averaged for probes in each room (except those in the floor).
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Figure 4: Daily variations of temperature for each room. Calculated as the difference between maximum and minimum temperatures recorded during the 18 days under study (filled triangles: 14–31 August 2008; crosses: 14–31 August 2010), averaged for probes in each room (except those in the floor).

Mentions: The daily variation of temperature (DVT) for a given day was computed as the difference of the maximum (Tmax) and minimum (Tmin) recorded values. It is well known that DVT should be kept as low as possible for an optimum conservation of wall paintings. DVT was calculated for the 18 days under study (Figure 4). In 2010, the most stable conditions (i.e., lowest DVT) were found in rooms 2 and 4 as well as floor sensors (DVT ≈ 7°C). Room 4 also yielded a similar DVT in 2008 because the roof was maintained and the 18-day time frame was properly chosen to achieve an equal mean temperature in this room for both years.


Evaluation of corrective measures implemented for the preventive conservation of fresco paintings in Ariadne's house (Pompeii, Italy).

Merello P, García-Diego FJ, Zarzo M - Chem Cent J (2013)

Daily variations of temperature for each room. Calculated as the difference between maximum and minimum temperatures recorded during the 18 days under study (filled triangles: 14–31 August 2008; crosses: 14–31 August 2010), averaged for probes in each room (except those in the floor).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3672094&req=5

Figure 4: Daily variations of temperature for each room. Calculated as the difference between maximum and minimum temperatures recorded during the 18 days under study (filled triangles: 14–31 August 2008; crosses: 14–31 August 2010), averaged for probes in each room (except those in the floor).
Mentions: The daily variation of temperature (DVT) for a given day was computed as the difference of the maximum (Tmax) and minimum (Tmin) recorded values. It is well known that DVT should be kept as low as possible for an optimum conservation of wall paintings. DVT was calculated for the 18 days under study (Figure 4). In 2010, the most stable conditions (i.e., lowest DVT) were found in rooms 2 and 4 as well as floor sensors (DVT ≈ 7°C). Room 4 also yielded a similar DVT in 2008 because the roof was maintained and the 18-day time frame was properly chosen to achieve an equal mean temperature in this room for both years.

Bottom Line: Data recorded in 2008 and 2010 were compared.As a result, the daily thermohygrometric variations resulted less pronounced in 2010, with a reduction of approximately 4°C, which is favorable for the preservation of mural paintings.In the room with four walls, the daily fluctuations also decreased about 4°C.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Applied Physics (UD Agriculture Engineering), Universitat Politècnica de València, Camino de Vera s/n, Valencia, 46022, Spain. fjgarcid@upvnet.upv.es.

ABSTRACT

Background: A microclimate monitoring study was conducted in 2008 aimed at assessing the conservation risks affecting the valuable wall paintings decorating Ariadne's House (Pompeii, Italy). It was found that thermohygrometric conditions were very unfavorable for the conservation of frescoes. As a result, it was decided to implement corrective measures, and the transparent polycarbonate sheets covering three rooms (one of them delimited by four walls and the others composed of three walls) were replaced by opaque roofs. In order to examine the effectiveness of this measure, the same monitoring system comprised by 26 thermohygrometric probes was installed again in summer 2010. Data recorded in 2008 and 2010 were compared.

Results: Microclimate conditions were also monitored in a control room with the same roof in both years. The average temperature in this room was lower in 2010, and it was decided to consider a time frame of 18 summer days with the same mean temperature in both years. In the rooms with three walls, the statistical analysis revealed that the diurnal maximum temperature decreased about 3.5°C due to the roof change, and the minimum temperature increased 0.5°C. As a result, the daily thermohygrometric variations resulted less pronounced in 2010, with a reduction of approximately 4°C, which is favorable for the preservation of mural paintings. In the room with four walls, the daily fluctuations also decreased about 4°C. Based on the results, other alternative actions are discussed aimed at improving the conservation conditions of wall paintings.

Conclusions: The roof change has reduced the most unfavorable thermohygrometric conditions affecting the mural paintings, but additional actions should be adopted for a long term preservation of Pompeian frescoes.

No MeSH data available.


Related in: MedlinePlus