Making colored biocidal multi-layer structure

1. A method of making a colored biocidal multi-layer structure, comprising:

providing a first layer of a first color;

locating a biocidal second layer on or over the first layer, the biocidal second layer of a second color different from the first color; and

patterning the first layer or providing an indicator in the first layer, wherein the pattern or indicator indicates that the biocidal second layer should be replaced.

2. The method of claim 1 , further including imprinting the first layer or the biocidal second layer.

3. The method of claim 1 , further including curing the first layer or curing the biocidal second layer.

4. The method of claim 1 , further including providing a support.

5. The method of claim 4 , further including locating an adhesive on or over the support.

6. The method of claim 4 , further including locating the first layer on or over the support and the biocidal second layer on or over the first layer on a side of the first layer opposite the support.

7. The method of claim 1 , further including laminating or coating the biocidal second layer on the first layer, wherein the biocidal second layer is thinner than the first layer.

8. The method of claim 1 , further including forming a dispersion of particles and coating the dispersion on or over the first layer to form the biocidal second layer.

9. The method of claim 1 , wherein the biocidal second layer includes particles that are silver, copper, have a silver or copper component, is a salt, has a sulfur component, has a copper component, is a silver sulfate salt, or includes phosphors.

10. The method of claim 1 , wherein the biocidal second layer includes one or more particles in a liquid and the particles self-segregate in the liquid before the liquid is cured.

11. The method of claim 1 , wherein the biocidal second layer includes one or more particles, and further including forming the biocidal second layer so that the particles extend from a surface of the biocidal second layer and have a portion of their surface area exposed.

12. The method of claim 11 , further including forming the biocidal second layer so that the biocidal second layer has a thickness that is less than at least one diameter of one or more of the particles, has a thickness that is less than a mean diameter of the particles, or has a thickness that is less than the median diameter of the particles.

13. The method of claim 11 , further including removing a portion of the biocidal second layer surface and increasing the exposed surface area of the particles.

14. The method of claim 13 , wherein the step of removing a portion of the biocidal second layer surface includes etching, plasma etching, reactive plasma etching, ion etching, or sandblasting.

15. The method of claim 1 , wherein the first layer includes one or more particles, and further including forming the first layer so that the particles extend from a surface of the first layer and are exposed.

16. The method of claim 15 , further including removing a portion of the first layer surface and increasing the exposed surface area of the particles.

17. The method of claim 16 , wherein the step of removing a portion of the first layer surface includes etching, plasma etching, reactive plasma etching, ion etching, or sandblasting.

18. The method of claim 1 , wherein the patterning is a patterning of the first color.

19. The method of claim 1 , further including laminating or coating the biocidal second layer on the first layer, wherein the biocidal second layer is thicker than the first layer.