Valblanc Chemie Pvt. Ltd. Supplies Optical Whitening Agent in Nonionic Nature. Valblanc Chemie Pvt. Ltd. Is an ISO 9001:2000 accredited company. Valblanc Chemie Pvt. Ltd. Is the manufacturer of optical whitening agents. Optical Whitening Agent in Nonionic Nature has been available with dazzling white effects on polyester. Optical Whitening Agent in Nonionic Nature can be effective at low temperatures below the boil without the use of a carrier. It comes under the brand name of Luminophore SFG.