Method of curing with ultraviolet radiation on substrates requiring low heat

An ultraviolet light curing device for curing ultraviolet light-curable materials on heat sensitive substrates, which comprises:

• (a) a frame for supporting at least one ultraviolet light source, reflectors, at least one shield on a substrate positioning means;
• (b) at least one ultraviolet light source attached to said frame and having a front and a back;
• (c) a rear reflector located behind the back of said at least one ultraviolet light source for diverting light toward a substrate positioning means;
• (d) a front reflector attached to said frame and located in front of said at least one ultraviolet light source, said front reflector being smaller in size than said rear reflector and positioned for reflecting light which illuminates from the front of said at least one ultraviolet light source back to said rear reflector;
• (e) a substrate positioning means positioned relative to said frame and located in front of said front reflector at a predetermined distance from said at least one ultraviolet light source for positioning a coated substrate for efficient ultraviolet light curing;
• (f) a shield located between said front reflector and said substrate positioning means, said shield being substantially infrared light reflective to prevent infrared light from reaching said substrate positioning means, and being substantially ultraviolet light permeable to permit ultraviolet light to reach said substrate positioning means, said shield being located a predetermined distance from said at least one ultraviolet light source;
• and,
• (g) a power source and control means connected to said at least one ultraviolet light source for functional operation thereof.