Pattern transferable to skin for optical measurements during shaving

1. A kit for measuring 3D deformation and strain on the skin of a living person comprising:

a non-contact optical 3D deformation measuring system including a plurality of high resolution digital cameras for measuring 3D coordinates and 3D deformations operatively connected to a computer;

a removable tattoo including a substrate and a pattern having a plurality of indicia distributed to form a pattern density of between about 40% and about 60%, wherein the removable tattoo provides a reference marking for the non-contact optical 3D deformation measuring system and;

a shaving razor transmitting a force to the skin.

2. The kit of claim 1 , wherein the indicia comprises dots.

3. The kit of claim 2 , wherein the dots comprise two or more different sized dots.

4. The kit of claim 2 , wherein the dots comprise three different sized dots.

5. The kit of claim 1 , wherein the pattern density is about 50%.

6. The kit of claim 1 , wherein the pattern density is about 42.5%.

7. The kit of claim 1 , wherein the indicia is transferable to the skin by wetting with an alcohol.

8. The kit of claim 1 , wherein the substrate is a paper.

9. The kit of claim 8 , wherein the paper is chosen from a group of paper consisting of blotting paper and cigarette paper.

10. The kit of claim 1 , wherein the indicia comprises a substantially water-insoluble ink or dye.

11. The kit of claim 10 , wherein the indicia comprises an oil-based ink or dye.

12. The kit of claim 1 , wherein the indicia is devoid of a cover layer formed above said indicia opposite said substrate.

13. The kit of claim 1 , wherein the removable tattoo is devoid of an adhesive layer atop said indicia.