Page 1 of 2 - PN# 53087

 

 

 

July 9, 2003

 

 

 

Mr. Edward Neugebauer, Jr.

Pro-Mold, Incorporated

206 Haigh Road

Kipton, Ohio  44049

 

 

 

Subject:             UV Transmittance and Research on two samples.

           

 

 

RECEIVED:             Two baseball holders identified as;  Pro-Mold and Ultra-Pro. 

 

 

 

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

Pro-Mold

 

99.889 %

99.951 %

99.887 %

99.984 %

Ultra-Pro

99.905 %

99.976 %

99.895 %

99.939 %

 

 

 

 

 

 

 

Page 1 of 2 - PN# 53087

 

 

July 9, 2003

 

 

Mr. Edward Neugebauer, Jr.

Pro-Mold, Incorporated

 

 

 

 

RESULTS CONTINUED:

 

 

 

EQUIVALENT SPF SUNSCREEN VALUES

 

 

Sample I.D.

 

Up to 385 nm

@ 386 nm

Pro-Mold

 

> 65

> 65

Ultra-Pro

> 65

57

 

 

 

 

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# 53087

MM/SWY/sc