Color impedance

T. Kim, J. J. Tryk, D. A. Amemiya, K. Hashimoto, and A. Fujishima [1997] Color Impedance and Electrochemical Impedance Studies of WO3 Thin Films ... 

T. Amemiya, K. Hashimoto, A. Fujishima, Frequency-resolvedfaradak processes in polypyrrole films observed by electromodulation techniques—electrochemical impedance and color impedance spectroscopies, J. Phys. Chem., 1993,97,16, pp. 4187-4191. 

Fig. 15.2a Two tunable vacuum tight cylindrical resonant cavities that were phase-locked and their impedance were matched using the impedance tuning coil. The plungers seen on the top were to aid us in tuning these cylinders to resonate in TE011 mode (See Color Plates)...

The conversion of anthocyanins to the various pigments mentioned in the earlier sections increases the range of available colors. Moreover, substitutions of the C-ring as encountered in some of the derivatives impede nucleophilic addition of sulfite or water, thus increasing color stability. 

Other additives include materials such as hindered amine light stabilizers (HALS) and UV light absorbers (UVAs) to protect the colorants from destruction due to the environment, as well as items such as defoamers and wetting or levehng agents to help improve lay down and flow out on the media. Some of these additives such as the stabilizers and the HALS and UVAs must be added in small amounts as they can also impede curing. 

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