Patent ID: 7517585

Claim:
A tape that is formed in a roll, comprising: a length of support material, said support material having a first layer, a second layer and a third layer coated thereon, wherein said first layer comprises an adhesive, said second layer comprises a color former, and said third layer comprises a color developer, and wherein each of said first layer, said second layer, and said third layer are separate from each other layer, wherein, when a portion of said length of support material is separated from a remainder of said length of said support material, a tear site is formed on said remainder of said tape where said portion of said length of support material is removed from said remainder of said length of support material, and said color former that is present at said tear site is reacted with said color developer at said tear site, to form a demarcation along said tear site, wherein said demarcation is of contrasting color to said support material.