Studies on the Expression of Color Tone in Rose Petals X. : Transmittance Curve of the Red Petal Extract, Measured with Translucent Cuvette.

概要

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On the reflectance measurements of red petals, part of incident light should be absorbed into some inner constituents of petals, and the remaining part passed away through the petals. The only part of incident light is detected by the spectrophotometer as the reflected light. In the present study, the transmittance measurements on pigment solutions were taken with the translucent cuvette to give an optical state similar to the translucent property of the petal. The translucent cuvettes were prepared by inserting the semitransparent pieces of plastic sheets along the inner walls of ordinary cuvettes. When the cuvettes having the transmittance of 40 to 60 % were used, the transmittance curves of red petal extracts became more approximate to the reflectance ones of red petals. From the results of colorimetric calculation it is suggested that the translucent property brings some modification of the color tone in the petals having higher content of pigment.
信州大学理学部の論文
1974-03-25