Security documents with multi-angled voids

A copy proof document comprising:

• first through fourth areas each having colored background lines at a first angle and colored VOID lines at a second angle, said second angle being at least about 20 degrees different than said first angle, but not 70-110 degrees or 160-200 degrees different;
• at last one of said first and second angles for each of said first through fourth areas being at least about 10 degrees different than said first and second angles for each of said other first through fourth areas;
• and
• substantially all of said background and VOID lines having a black content of at least about 15%, a density of between about 7-22%, and all of said lines in said first through fourth areas have an average maximum line width variation of about 0.00025 inches so that said document is substantially copy proof.

A substantially copy proof document having first through fourth edges, and comprising:

• first through fourth areas each having colored background lines at a first angle and colored VOID lines at a second angle, said second angle being at least about 20 degrees different than said first angle, but not 70-110 degrees or 160-200 degrees different;
• at least one of said first and second angles for each of said first through fourth areas being at least about 10 degrees different than said first and second angles for each of said other first through fourth areas;
• substantially all of said background and VOID lines having a black content of at least about 15%, and a density of between about 7-22%, so that said document is substantially copy proof;
• and
• first and second quality control sections each adjacent one of said first through fourth edges, said first quality control section having a density that is about 2% greater, and said second quality control section having a density that is about 5% greater, than the density of said first through fourth areas.

A method of making a copy proof document having a first through fourth edges, the first and third edges opposite each other, a central section having:

• first through fourth areas having each having colored background lines at a first angle and colored VOID lines at a second angle, the second angle being at least about 20 degrees different than the first angle, but not 70-110 degrees or 160-200 degrees different;
• the first and second angles for each of the first through fourth areas being at least 10 degrees different than the first and second angles for each of the other first through fourth areas;
• and substantially all of the background and VOID lines having a black content of at least about 15%, and a density of between about 7-20%, so that the document is substantially copy proof;
• and first and second quality control sections along the first and third edges, respectively, the quality control sections each having a width of about 1/8 inch or less, and the first section having a density about 2% greater than the central section, and the second section having a density about 5% greater than the central section;
• said method practiced using a press which images the document on a roll of paper, and said method comprising the steps of:
• (a) at least at approximately the beginning and end of each roll performing a quality control check of the document by taking measurements on the imaged document itself in each of the central, first, and second sections of the document to determine if the average line width of all lines in the central section are about 0.0025 inches.+-.0.0005 inches, and in each of the first and second sections is about 0.0030 inches.+-.0.0005 inches;
• and
• (b) if necessary make press adjustments to ensure that the line widths are within the ranges set forth in step (a) above as determined by measurements taken after press adjustments are effected.