fuorescent brightener

We are in search of better brightening agent. We are mfr of ptg inks.We need brightening agent which when added in the white ink should give excellent glow brightness and the white should look extra ordinary.The tonal value should show bluish rediish tone. I tried violet,ultramarine blue,OB yellow tone,fluorescent brightener but none gives that beautiful effect. If u have this product plz let us know and needs samples too. Ur cooperation shall be grateful Wrgds Saeed Qureshi