Watermark ink problem

Hello guys
hope you all fine. I have problem with watermark ink, I got it from fake-proof.com antiforgery ink supplier. the was supposed to invisible it self after printing but it's shinney and clear visible on color papers. the inks it self is white.
is there any way I can hide it.
ink is also very hard do I need to mix with it something.
thanks please help guys

if the inks it self is white why you not use white paper