Security ink based security feature
A security article may include a substrate. The security article may include a layer of security ink. The layer of security ink may include a set of color-shifting interference particles. The security article may include a layer of magnetic color-shifting ink. The layer of magnetic color-shifting ink may include a set of magnetically aligned magnetic particles. A color-shifting property of the layer of security ink and a color-shifting property of the layer of magnetic color-shifting ink may have a threshold level of similarity to create a color matching effect.
1. A method comprising:
exposing a security article to a first magnetic field to magnetically orient a first set of particles of a first ink layer,
the first set of particles being parallel to a surface of a substrate of the security article;
curing the first ink layer to fix an orientation of the first set of particles; and
exposing, after curing the first ink layer to fix the orientation of the first set of particles, the security article to a second magnetic field to magnetically orient a second set of particles of a second ink layer,
the first ink layer forming a color-shifting security feature, and
the second ink layer forming a dynamic feature.
2. The method of claim 1 , wherein the second magnetic field is different from the first magnetic field.
3. The method of claim 1 , wherein the second magnetic field is a rotation magnetic field.
4. The method of claim 1 , wherein curing the first ink layer comprises:
exposing the first ink layer to an ultra-violet (UV) light to cure the first ink layer.
5. The method of claim 1 , further comprising:
printing the first ink layer onto the substrate; and
printing the second ink layer onto the first ink layer or the substrate.
6. The method of claim 1 , further comprising:
depositing a first portion of the second ink layer onto the first ink layer; and
depositing a second portion of the second ink layer onto the substrate.
7. The method of claim 1 , wherein a first pigment of the first ink layer is a metameric pair with a second pigment of the second ink layer.
8. The method of claim 1 ,
wherein the first ink layer forms a static security feature, and
wherein the second ink layer forms a dynamic security feature.
9. The method of claim 1 , wherein the color-shifting security feature surrounds the dynamic feature.
10. A method comprising:
exposing a security article to a first magnetic field to magnetically orient a first set of particles of a first ink layer;
curing the first ink layer to fix an orientation of the first set of particles; and
exposing, after curing the first ink layer to fix an orientation of the first set of particles, the security article to a second magnetic field to magnetically orient a second set of particles of a second ink layer,
wherein the first ink layer forms a color-shifting security feature,
wherein the second ink layer forms a dynamic feature,
wherein the first ink layer comprises a first pigment concentration, and
wherein the second ink layer comprises a second pigment concentration that is different from the first pigment concentration.
11. An article comprising:
a dynamic feature formed from magnetic particles; and
a color-shifting feature formed from non-magnetic particles,
the magnetic particles forming an image that is contiguous to a region of color formed from the non-magnetic particles,
the color-shifting feature including a set of layers of a first ink, and
the dynamic feature including a second ink that is a color matching or a metameric pair with the first ink or another layer of security ink.
12. The article of claim 11 , wherein the dynamic feature includes a magnetically aligned ink.
13. The article of claim 11 , wherein at least one of the dynamic feature or the color-shifting feature is within 20 millimeters of an edge of the article.
14. The article of claim 11 , wherein the color-shifting feature appears as a first color at a first orientation and as a second color at a second orientation.
15. The article of claim 11 , wherein the dynamic feature comprises a three-dimensional effect.
16. The article of claim 11 , wherein the color-shifting feature surrounds the dynamic feature.
17. A security article comprising:
a dynamic security feature formed from magnetic particles; and
a static security feature,
the dynamic security feature orienting a viewer of the security article toward a region of the security article that includes the dynamic security feature and the static security feature, and
the static security feature including a set of pigment particles aligned parallel to a substrate of the security article.
18. The security article of claim 17 , wherein the static security feature is formed from non-magnetic particles.
19. The security article of claim 17 , wherein the magnetic particles form an image that is contiguous to a region of color formed from particles of the static security feature.
20. The security article of claim 17 , wherein the dynamic security feature comprises a three-dimensional effect.