Authenticatable printed matter, and method for producing the same

A method of generating an authenticity discriminable printed pattern in which a latent image that is formed on a collective pattern cannot be visually identified easily under ordinary visible light but becomes visible upon being irradiated with UV rays, said method comprising the steps of:

• making a design for a basic image having a latent image portion and a latent image peripheral portion,
• the latent image portion and the latent image peripheral portion being difficult to be discriminated under the ordinary visible light, each of the latent image portion and the latent image peripheral portion being formed from a set of dots continuously laid out at a predetermined period, a resolution of the dots of the latent image portion being different from that of the dots of the latent image peripheral portion, and the latent image portion and the latent image peripheral portion having the same percent dot area per unit area and different dot peripheral lengths per unit area;
• and
• printing the latent image portion and the latent image peripheral portion according to the design on a base material using color fluorescent ink.

An authenticity discriminable printed pattern in which a latent image that is formed on a curved collective pattern cannot be visually identified easily under ordinary visible light but becomes visible upon being irradiated with UV rays, said authenticity discriminable printed pattern comprising:

• the curved collective pattern including:
• one image line having no latent image;
• and
• a plurality of branched image lines that have the latent image and are visually recognized as one continuous line,
• wherein the curved collective pattern is designed so as to make a sum of image line widths of the plurality of branched image lines substantially equal an image line width of said one image line and a sum of image line peripheral lengths in a predetermined length of the plurality of branched image lines in a direction of curved reference line different from a sum of image line different from a sum of image line peripheral length of said one image line in the direction of curved reference line, and said one image line and the plurality of branched image lines are printed by color fluorescent ink.

A method of generating an authenticity discriminable printed pattern in which a latent image that is formed on a curved collective pattern cannot be visually identified easily under ordinary visible light but becomes visible upon being irradiated with UV rays, said method comprising the steps of:

• making a design for the curved collective pattern that is formed from one image line having no latent image and a plurality of branched image lines which have the latent image and are visually recognized as one continuous line,
• wherein the curved collective pattern is designed so as to make a sum of image line widths of the plurality of branched image lines substantially equal an image line width of said one image line and a sum of image line peripheral lengths in a predetermined length of the plurality of branched image lines in a direction of curved reference line different from a sum of image line peripheral lengths in the predetermined length of said one image line in the direction of curved reference line;
• and
• printing one image line and the plurality of branched image lines according to the design using color fluorescent ink.

An authenticity discriminable printed pattern in which a latent image that is formed on a curved collective pattern cannot be visually identified easily under ordinary visible light but becomes visible upon being irradiated with UV rays, said authenticity discriminable printed pattern comprising:

• the curved collective pattern including non-latent image line formed from a solid line having no latent image;
• and
• a latent image line formed from a periodic broken line having the latent image, the periodic broken line being formed from image lines which have a predetermined shape and are visually recognized as one continuous line and laid out in a direction of curved reference line,
• wherein the curved collective pattern is designed so as to make an image line area of a portion formed from one image line portion and one non-image line portion corresponding to one period of the periodic broken line substantially equal an image line area of the solid line having a length corresponding to one period of the periodic broken line and an image line peripheral length of the portion formed from one image line portion and one non-image line portion corresponding to one period of the periodic broken line different from an image line peripheral length of the solid line corresponding to one period of the periodic broken line, and the image line formed from the solid line and the image line formed from the periodic broken line are printed by color fluorescent ink.

The method of generating an authenticity discriminable printed pattern in which a latent image that is formed on a curved collective pattern cannot be visually identified easily under ordinary visible light but appears upon being irradiated with UV rays, said method comprising the steps of:

• making a design for the curved collective pattern that is made of a non-latent image line formed from a solid line having no latent image and a latent image line formed from a periodic broken line having the latent image, the periodic broken line being formed from image lines which have a predetermined shape and are visually recognized as one continuous line and laid out in a direction of curved reference line,
• wherein the curved collective pattern is designed so as to make an image line area of a portion formed from one image line portion and one non-image line portion corresponding to one period of the periodic broken line substantially equal an image line area of the solid line having a length corresponding to one period of the periodic broken line and an image line peripheral length of the portion formed from one image line portion and one non-image line portion corresponding to one period of the periodic broken line different from an image line peripheral length of the solid line corresponding to one period of the periodic broken line;
• and
• printing according to the design the non-latent image line formed from the solid line and the latent image line formed from the periodic broken line using color fluorescent ink.

An authenticity discriminable printed pattern in which a latent image is formed on an image line pattern formed from one or a plurality of image lines using a straight line or curved line as an image line portion, said authenticity discriminable printed pattern comprising:

• an image line of a portion having no latent image in the image line pattern formed from a solid line;
• and
• an image line of a portion having the latent image formed from image lines made of broken lines obtained by using a reference line as a central portion of the solid line as a reference, substantially equidistantly branching the image line into a plurality of image lines in a direction perpendicular to the reference line, and dividing each of the plurality of branched image lines in a direction substantially perpendicular to the reference line,
• wherein the broken lines are formed from image lines for which a sum of image line areas of the image lines having a length of a portion corresponding to one period formed from an image line portion and a non-image line portion of the broken line divided in the direction of reference line in the broken lines of the portion having the latent image substantially equals an image line area of the solid line of a portion corresponding to the same length as one period in the broken lines divided in the direction substantially perpendicular to the reference line in the solid line of the portion having no latent image, and the image line of the portion having no latent image and the broken lines of the portion having the latent image are printed by color fluorescent ink.

A method of generating an authenticity discriminable printed pattern in which a latent image is formed on an image line pattern formed from one or a plurality of image lines using a straight line or curved line as an image line portion, said method comprising the steps of:

• making a design for an image line of a portion having no latent image in the image line pattern which is formed from a solid line, an image line of a portion having the latent image which is formed from image lines made of broken lines obtained by using a reference line as a central portion of the solid line as a reference, substantially equidistantly branching the image line into a plurality of image lines in a direction perpendicular to the reference line, and dividing each of the plurality of branched image lines in a direction substantially perpendicular to the reference line,
• wherein the broken lines are formed from image lines for which a sum of image line areas of the image lines having a length of a portion corresponding to one period formed from an image line portion and a non-image line portion of the broken line divided in the direction of reference line in the broken lines of the portion having the latent image substantially equals an image line area of the solid line of a portion corresponding to the same length as one period in the broken lines divided in the direction substantially perpendicular to the reference line in the solid line of the portion having no latent image;
• and
• printing according to the design the image line of the portion having no latent image and the broken lines of the portion having the latent image using color fluorescent ink.