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	Optical Brighteners. Sponsored by Freestyle Photo u0026 Imaging Supplies (Los Angeles Center of Photography) View
	Optical Brightening Agents or OBAs on Photo Papers! Great until they do this! (Jose Rodriguez Photo Printing Techie) View
	OBAs Good or bad Optical brighteners in photo and art papers. Should you insist on OBA free (Keith Cooper) View
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	6. Optical Brighteners in Photographic Paper: New Methods, Data, Results (Lens Media Lab) View
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