%0 Journal Article %T CALIBRATION OF MEASURING INSTRUMENTS FOR TRANSMITTANCE COEFFICIENTS AND OPTICAL DENSITY USING A SECONDARY STANDARD AND AUTOMATED PROCESSING OF MEASUREMENT DATA %A Zharavina, K.O. %A Lavrinov, S.V. %A Lyadov, M.A. %A Petrova, E.V. %A Dresvyannikov, A.F. %A Koldybaeva, N.N. %K CALIBRATION, OPTICAL DENSITY, SECONDARY STANDARD, MEASUREMENT UNCERTAINTY, VALIDATION, VERIFICATION, AUTOMATIC DATA PROCESSING %J Herald of Technological University %D 2026 %N 29 %P 6 %I Kazan National Research Technological University