حبر فلورسنت للأشعة فوق البنفسجية

It’S invisible but can show visible color under the 200-400nm UV light.It can be divided into long wave(365nm),short wave(254nm)and double wave according to its wavelength.
Color:
Long wave:Invisible-yellow,orange,red,yellow green,emerald green,grass green,blue,
reddish blue,black,white,blue green
Red to orange,red to red,green to grass green,blue to grass green,
orange to red,yellow to red,Black to red,black to green…
Short wave:Invisible-yellow,orange,red,green
Double wave:Long wave red—Short wave green,
Long wave blue—short wave red,yellow,orange,green
Long wave grass green-Short wave yellow,orange,red
Printing way:Offset,UV offset,Letterpress,UV letterpress,UV flexo,Silkscreen,
UV silk screen,Water-based silk screen,Water-based flexo,Gravure