Container closure and related methods
A container closure includes a dosage body including at least one peripheral wall defining a containment chamber. The peripheral wall has an internal wall surface adjacent the containment chamber, the internal wall surface having a surface luminance. Indicia is carried by the internal wall surface, the indicia having an indicia luminance. A contrast between the surface luminance and the indicia luminance is at least about 0.67% on the Weber scale.
1. A container closure, comprising:
a dosage body including at least one peripheral wall defining a containment chamber, the peripheral wall having an internal wall surface adjacent the containment chamber, the internal wall surface having a surface luminance; and
indicia, carried by the internal wall surface, the indicia having an indicia luminance that is lower than the surface luminance, a contrast between the surface luminance and the indicia luminance being at least about 0.67% on the Weber scale.
2. The closure of claim 1 , wherein the contrast between the surface luminance and the indicia luminance is at least about 20% on the Weber scale.
3. The closure of claim 1 , wherein the contrast between the surface luminance and the indicia luminance is at least about 50% on the Weber scale.
4. The closure of claim 1 , wherein the indicia comprises printed indicia.
5. The closure of claim 4 , wherein the printed indicia includes an indicia height, the indicia height being less than about 40 μm.
6. The closure of claim 4 , further comprising a printed substrate carried by the internal wall surface, the indicia being printed on the printed substrate.
7. The closure of claim 6 , wherein the printed substrate comprises an in-mold label formed at least partially in the internal wall surface.
8. A container closure, comprising:
a dosage body including at least one peripheral wall defining a containment chamber, the peripheral wall having an internal wall surface adjacent the containment chamber, the internal wall surface having a surface luminance;
indicia, carried by the internal wall surface, the indicia comprising printed indicia and having an indicia luminance that is lower than the surface luminance, a contrast between the surface luminance and the indicia luminance being at least about 0.67% on the Weber scale.
9. The closure of claim 8 , wherein the printed indicia includes an indicia height, the indicia height being less than about 40 μm.
10. The closure of claim 8 , further comprising a printed substrate carried by the internal wall surface, the printed indicia being printed on the printed substrate.
11. The closure of claim 10 , wherein the printed substrate comprises an in-mold label at least partially formed in the internal wall surface.
12. The closure of claim 10 , wherein the printed substrate comprises a label adhered to the internal wall surface.
13. The closure of claim 8 , wherein the printed indicia is printed directly on the internal wall surface.
14. A method of forming a container closure, comprising:
forming a dosage body having at least one peripheral wall defining a containment chamber, the peripheral wall having an internal wall surface adjacent the containment chamber, the internal wall surface having a surface luminance; and
applying indicia to the internal wall surface, the indicia being printed indicia having an indicia luminance that is lower than the surface luminance;
selecting the surface luminance and the indicia luminance such that a contrast between the surface luminance and the indicia luminance is at least about 0.67% on the Weber scale.
15. The method of claim 14 , wherein applying the indicia to the internal wall surface comprises applying a printed substrate to the internal wall surface, the printed indicia being printed on the printed substrate.
16. The method of claim 15 , wherein the printed substrate comprises an in-mold label, and wherein forming the dosage body includes forming the in-mold label at least partially within the internal wall surface.
17. The method of claim 15 , wherein the printed substrate comprises a label, and wherein applying the indicia to the internal wall surface comprises adhering the label to the internal wall surface.
18. The method of claim 14 , wherein the contrast between the surface luminance and the indicia luminance is at least about 20% on the Weber scale.
19. The method of claim 14 , wherein applying the printed indicia to the internal wall surface includes printing the printed indicia directly on the internal wall surface.