Ivanova I.Spiridonov I.Boeva R.2024-07-102024-07-102024-07-102024-07-102024-01-011314-79781314-747110.59957/jctm.v59.i3.2024.12SCOPUS_ID:85193381129https://rlib.uctm.edu/handle/123456789/950In the present experiment, a study was conducted to investigate the effect of conservation treatment of an Arabic manuscript on its chromatic characteristics. For this purpose, extremely valuable, unrestored manuscripts (18 - 19th century) were selected from the archives of the National Library “St. St. Cyril and Methodius”, on which spectrophotometric chromatic characteristics were measured. The research was conducted at the restoration center of the National Library. The following processes were applied to the manuscript: mechanical cleaning and deacidification. Measurements of color characteristics were taken indifferent parts of the manuscript after each stage of the treatment: before treatment, after mechanical cleaning, after deacidification. The following parameters - CIE Lab, CIE Lch, ΔEab, ΔE2000, ΔL, Δc, Δh was calculated. Based on the results obtained, the changes and effects of each of the chromatic parameters were determined.enArticle