Studies on the Development of Color Tone in Rose Petals IV
Comparison of Spectro-Reflectance of Red Rose Petal and Spectro-Transmittance of Anthocyanin Solutions
1967 Volume 80 Issue 944 Pages 86-91
Details
1967 Volume 80 Issue 944 Pages 86-91
The spectro-reflectance curves of red rose petals (Fig. 1) of cultivars, Happiness, Karl Herbst and Radar, were compared with the spectro-transmittance curves of the pigment solutions containing 25-450γ/ml of cyanin at pH 2.0-3.5 (Fig. 2).
When cyanin in higher concentrations was applied, its transmittance curve came near to the reflectance one.
The transmittance curve of cyanin solution saturated with rutin was more similar to the reflectance curve.
To make the better comparison between two kinds of curve, several per cent.
of reflectance must be deducted from the total reflectance measured, taking the surface reflection of red petals into account (Yasuda, 1964)10).
