A method comprising: (a) providing a known homogeneous liquid sample comprising one or more known photosensitive entities at appropriate concentrations, wherein said appropriate concentrations are from 0.001 wt% to 10 wt%; (b) providing a cell having controlled optical properties to contain the sample at a controlled temperature between -20°C and 100°C; (c) providing a light source that generates a light beam with a controlled spectral signature between 290 and 1000 nm and a controlled intensity between 0.01 and 5 W/cm 2; (d) placing the sample into the cell, rendering a sample cell; (e) placing a first test material of a class of materials between the light source and the sample cell, rendering a shielded sample cell, wherein the light beam impinges upon the first test material and any penetrating light impinges upon the sample cell, and wherein the first test material comprises a known quantitative or qualitative property; (f) exposing the shielded sample cell to one or more intensities of said light beam for one or more durations; (g) measuring the changes to the one or more photosensitive entities contained within the shielded sample cell at one or more durations to generate data points; (h) using the data points to determine a photoprotective performance value of the first test material; (i) repeating steps (a)-(h) with one or more additional test materials of the same class of materials under the same conditions to generate one or more additional photoprotective performance values; (j) utilizing the two or more photoprotective performance values to generate the model for a class of materials that relates that known qualitative or quantitative property to the photoprotective performance; (k) using the model of step (j), for materials of the same class of materials, predicting the unknown qualitative or quantitative property of a material based upon a known photoprotective performance value or predicting an unknown photoprotective performance value based upon a known qualitative or quantitative property of the material; and (l) correlating the changes to the one or more photosensitive entities in step (g) with one or more sensory evaluation criteria values and utilizing said predicted photoprotective performance to further predict one or more sensory evaluation criteria values of an untested material within the same class of materials; wherein a test material is any material suitable for use as a packaging material or photoprotective material. (a) providing a known homogeneous liquid sample comprising one or more known photosensitive entities at appropriate concentrations, wherein said appropriate concentrations are from 0.001 wt% to 10 wt%; (b) providing a cell having controlled optical properties to contain the sample at a controlled temperature between -20°C and 100°C; (c) providing a light source that generates a light beam with a controlled spectral signature between 290 and 1000 nm and a controlled intensity between 0.01 and 5 W/cm 2; (d) placing the sample into the cell, rendering a sample cell; (e) placing a first test material of a class of materials between the light source and the sample cell, rendering a shielded sample cell, wherein the light beam impinges upon the first test material and any penetrating light impinges upon the sample cell, and wherein the first test material comprises a known quantitative or qualitative property; (f) exposing the shielded sample cell to one or more intensities of said light beam for one or more durations; (g) measuring the changes to the one or more photosensitive entities contained within the shielded sample cell at one or more durations to generate data points; (h) using the data points to determine a photoprotective performance value of the first test material; (i) repeating steps (a)-(h) with one or more additional test materials of the same class of materials under the same conditions to generate one or more additional photoprotective performance values; (j) utilizing the two or more photoprotective performance values to generate the model for a class of materials that relates that known qualitative or quantitative property to the photoprotective performance; (k) using the model of step (j), for materials of the same class of materials, predicting the unknown qualitative or quantitative property of a material based upon a known photoprotective performance value or predicting an unknown photoprotective performance value based upon a known qualitative or quantitative property of the material; and (l) correlating the changes to the one or more photosensitive entities in step (g) with one or more sensory evaluation criteria values and utilizing said predicted photoprotective performance to further predict one or more sensory evaluation criteria values of an untested material within the same class of materials;