A lubricating strip comprising: a first layer comprising a first lubricating material having a first color; and a second layer disposed under the first layer and comprising a second lubricating material having a second color different from the first color, wherein the first layer and the second layer are configured to: form at least one boundary line (B1, B2), which is not parallel to a straight line along a width direction of the lubricating strip , on a cross-section of the lubricating strip cut in a direction perpendicular to a longitudinal direction of the lubricating strip ; and define multiple shaving layers (A1, A2, A3) including a first shaving layer (A1) comprising the first layer , a second shaving layer (A2) comprising the first layer and the second layer , and a third shaving layer (A3) comprising the second layer , the multiple shaving layers (A1, A2, A3) being arranged along a straight line parallel to a height direction of the lubricating strip , and wherein, when the lubricating strip is mounted to a razor cartridge , a top exposure surface of the first layer comprises 95% to 100% of a surface area of the lubricating strip , characterized in that the first layer in the first shaving layer (A1) has a sufficient degree of solubility or thickness so that it is removed by the first use of the lubricating strip . a first layer comprising a first lubricating material having a first color; and a second layer disposed under the first layer and comprising a second lubricating material having a second color different from the first color, wherein the first layer and the second layer are configured to: form at least one boundary line (B1, B2), which is not parallel to a straight line along a width direction of the lubricating strip , on a cross-section of the lubricating strip cut in a direction perpendicular to a longitudinal direction of the lubricating strip ; and define multiple shaving layers (A1, A2, A3) including a first shaving layer (A1) comprising the first layer , a second shaving layer (A2) comprising the first layer and the second layer , and a third shaving layer (A3) comprising the second layer , the multiple shaving layers (A1, A2, A3) being arranged along a straight line parallel to a height direction of the lubricating strip , and wherein, when the lubricating strip is mounted to a razor cartridge , a top exposure surface of the first layer comprises 95% to 100% of a surface area of the lubricating strip , characterized in that the first layer in the first shaving layer (A1) has a sufficient degree of solubility or thickness so that it is removed by the first use of the lubricating strip . form at least one boundary line (B1, B2), which is not parallel to a straight line along a width direction of the lubricating strip , on a cross-section of the lubricating strip cut in a direction perpendicular to a longitudinal direction of the lubricating strip ; and define multiple shaving layers (A1, A2, A3) including a first shaving layer (A1) comprising the first layer , a second shaving layer (A2) comprising the first layer and the second layer , and a third shaving layer (A3) comprising the second layer , the multiple shaving layers (A1, A2, A3) being arranged along a straight line parallel to a height direction of the lubricating strip , and wherein, when the lubricating strip is mounted to a razor cartridge , a top exposure surface of the first layer comprises 95% to 100% of a surface area of the lubricating strip , characterized in that the first layer in the first shaving layer (A1) has a sufficient degree of solubility or thickness so that it is removed by the first use of the lubricating strip . <EOS>