Long blue waves and short red waves by offset printing is testing on paper

we can made long waves and short waves uv fluorescent ink,we made security ink for more then 15 years.Long blue waves and short red waves by offset printing is testing on paper,it was selling to Vietnam,he’s my old custmer,we were Cooperation for three year later,he is nice person and easy going. i like cooperation with him.i hope we can keep work together.