Abstract: A document has a substrate with a first side. The first side has a first area within which the substrate is a first color. The document also has a plurality of marks on the substrate within a second area. The second area is smaller than the first area and is within the first area. Each mark is a different color from the first color. The density and size of the marks is such that at a distance of about twenty inches, the first area appears to the human eye to have a shaded area corresponding to the second area, as well as an unshaded area corresponding to a portion of the first area not occupied by the second area. At a distance of about eight inches, the second area appears to the human eye to have a plurality of marks.

Abstract: Business forms, particularly financial instruments such as checks, money orders, bank drafts, etc., are constructed with CF and CB, or self-imaging, sheets. MICR characters may be printed on the sheets without subsequent smearing by applying a UV curable ink to a CF or self-imaging sheet so as to block the CF or self-imaging material at the selected portion to which the ink is applied, thereby rendering it incapable of functioning as a CF or self-imaging element. The ink is applied to a moving web in a continuous manner prior to printing to form a continuous strip of ink, which moves past a UV radiation source so that it is quickly cured and does not adversely affect high speed production. The ink may also be applied to a CB, CF, or self-imaging sheet as a security feature, selectively blocking the transmission of confidential indicia at the selected portion of the sheet with which it is associated.