Superior light transmission

SAN and ASA are naturally transparent with high light transmission, possibly superior to 90%, and a refractive index of about 1.56-1.57 for a SAN grade. Haze is low, about 0.4-0.8%. 

The special properties of OTEs that permit the use of transmission spectro-electrochemical techniques are often at cross purposes with the acquisition of reliable electrochemical data. The desire to have the superior electrical properties of bulk conducting materials, and thereby reliable electrochemical data, together with the power of a coupled optical probe led groups to develop various diffraction and reflection approaches to spectroelectrochemistry. Light diffracted by a laser beam passing parallel to a planar bulk electrode can be used to significantly increase the effective path length and sensitivity in spectroelectrochemistry [66]. 

Durmus, A., Gunbas, G.E., Camurlu, R, Toppare, L., 2007. A neutral state green polymer with a superior transmissive light blue oxidized state. Chem. Commun. 31,3246-3248. 

Although general-purpose films are available, they can be varied in composition to meet specific requirements. Such special formations may be superior to standard films in flame resistance, heat sealing characteristics, water absorption, cold resistance, water vapor transmission, light or solvent resistance, etc. 

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