خلاصة:
One of the most prosperous periods of Iranian architecture was the Safavid era, and many works and buildings from this period remain. Studying and preserving these buildings for religious reasons is of special importance. The subject investigated in this article, namely the causes of color change in the yellow and green glazes of the tiles of the Imam Mosque in Isfahan, is a problem that can more or less be encountered in other works and buildings of the Safavid period. Although the patterns and decorations of the tilework of these buildings inspire admiration in every viewer, the existence of problems such as the subject investigated in this article shows technical weaknesses in the production of seven-colored tiles.
ملخص الجهاز:
Investigation of Color Change Factors in Yellow and Green Glazes of the Seven-Colored Tiles of Imam Mosque, Isfahan (Safavid Era) Abbas Abed Esfahani* Ketaboon Zahedian** Abstract: One of the most prosperous periods of Iranian architecture was the Safavid era, and many works and buildings from this period remain.
The subject investigated in this article, namely the causes of color change in the yellow and green glazes of the tiles of the Imam Mosque, is a problem that can more or less be encountered in other works and buildings of the Safavid era.
Keywords: yellow and green glaze, atomic absorption, visible spectroscopy and photometry, ion exchange, network degradation, SEM Introduction: If a close look is taken at the beautiful tilework of the Imam Mosque, Sheikh Lotfollah Mosque, and other works of the Safavid era, the color change of the yellow and green glazes of these seven-colored tiles can be observed.
(Table 1) (Refer to the images on the page) Table 1- Results of quantitative analysis of healthy yellow and green glazes The presence of copper in the green glaze causes further weakening of the glaze.
2- Microscopic observations To investigate the structural status of the healthy and degraded yellow and green glaze samples, they were observed via microscopy.
(Refer to the images on the page) Table 2- Percentage of lead and tin element exit from healthy yellow and degraded yellow glazes The results of Table 2 show no exit of tin and indicate the release of lead ions from the glaze network.
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