Study of the effect of various damage factors on the damage of the glass artifacts kept in historical stores and the methodology of treatment and conservation appliedon the glass artefact kept in Museum of Islamic Art in Cairo

Glass is a relatively stable material in the normal preservation environment, compared to other materials, As its rate of deterioration is somewhat slow, and does not appear clearly until long periods periods have elapsed. Because the impact of the different deterioration factors of glass effects varies according to conservation conditions, Therefore the research discusses the factors and causes of the damage of glass effects kept in historical stores. These factors were found to be endogenous factors related to the composition and manufacture of glass. its may result in various aspects such as cracks and air bubbles, stonning of glass , the loss of transparency (glass crystallization) and sand impurities, exogenous factors related to the nature of the surrounding environment, The most dangerous factors of damage to the glass is humidity, which result in the phenomenon of corrosion of glass which emergence of many aspects of damage associated with, including the phenomenon of hydrogen glass , opacity glass , iridescence and the phenomenon of glass weeping and also external damage factors impact of heat Air pollutants, vibrations, the impact of micro-organisms and human destruction.The research presents acase study for the restoration of glass artefact preserved in the Museum of Islamic Art in Cairo ,The aim of the research is to study the chemical composition of the artefact, its components, and the extent of its damage In addition,the restoration and storage operations were carried out. . Therefore, many different examinations and analysis were used, including imaging with the portable optical microscope, scanning electron microscopy and analysis using scanning electron microscope provided with (EDX)unit and XRD analysis. Glass restoration and conservation operations have been carried out, including mechanical and chemical cleaning, assembly and completion of the missing parts. The storage process was carried out using materials that were mostly acid-free and in a supportive manner to preserve the impact during the storage process.