Mr. Edward Neugebauer, Jr.

Pro-Mold, Incorporated

Subject:        UV Transmittance on one sample.

RECEIVED:      One Card Holder identified as;  Item MH1UV. 

UV/VIS ABSORPTION SPECTROMETRY

Instrument :                   Perkin Elmer UV/VIS Spectrometer Lambda 25

Scan Wavelength :        190 – 400 nm

Scan Speed :                960 nm/min.

RESULTS:

% BLOCKED FROM UVA RADIATION

Sample I.D.	@ 358 nm	@ 369 nm	@ 374 nm	@ 383 nm
MH1UV	99.988 %	99.991 %	99.987 %	100 %

EQUIVALENT SPF SUNSCREEN VALUES

Sample I.D.	Up to 385 nm	@ 386 nm
MH1UV	> 65	> 65

Discussion

Ultraviolet light is divided into three major wavelengths:  UVA, UVB, and UVC.  UVC radiation is completely blocked by the ozone layer with wavelengths from 200 to 290 nm.   The UVA and UVB radiation is not completely blocked by the ozone layer.  The UVA wavelengths are from 320 to 400 nm and the UVB wavelengths are from 290 to 320 nm.

Melissa A. Martin                                                Scott W. Yates

Sr. Project Technician                                          Assistant Manager– Plastics Testing Division

AKRON RUBBER DEVELOPMENT LABORATORY, INC.

PN# 73427

MM/SWY/sc