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 comprising the first layer, a second shaving layer comprising the first layer and the second layer, and a third shaving layer 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 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 comprising the first layer, a second shaving layer comprising the first layer and the second layer, and a third shaving layer 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 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 comprising the first layer, a second shaving layer comprising the first layer and the second layer, and a third shaving layer 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 has a sufficient degree of solubility or thickness so that it is removed by the first use of the lubricating strip.