The Letters patent of Peter I to court counselor Savva Raguzinsky for faithful and diligent service, 1710. Part 1. Pre-restoration research and dismantling
In order to identify the technological features of the Letters patent by Peter I, optical-physical (IR reflectography, microscopic examination and subsequent photo-recording), as well as complex physical and chemical studies of samples of the base, colorful layers, binders were carried out. The methods included microscopy in reflected light, microchemistry, x-ray fluorescence analysis, IR-Fourier spectroscopy, morphological determination of the materials of the certificate and the cover of the fiber. Based on the data obtained, a restoration program was developed. At the first stage of the conservation, the dismantling of the certificate was carried out, including the separation of the fabric cover with cords from parchment sheets with text.