Optical Properties - Site Under Construction

Parylene exhibits very little absorption in the visible region and is, therefore, transparent and colorless. Below about 280 mu both N and C absorb strongly. 

Ultraviolet Spectra of Parylene C and N

Both parylenes are relatively featureless to at least 50 micron wavelengths (except for a few characteristic peaks), especially in thin film form (<1 u). 

Radiation and Weathering Resistance

Parylene C and N films show a high degree of resistance to degradation by gamma rays in vacuum. Tensile and electrical properties were unchanged after 100 megarad dosage at a rate of 1.6 megarads per hour. Exposure in air leads to rapid embrittlement.

Although stable indoors, the parylenes are not recommended for use outdoors when exposed to direct sunlight.

Optical Clarity
Zero Distortion