EP 3 800 016 A1 Description SUMMARY OF THE INVENTION BRIEF DESCRIPTION OF THE DRAWINGS 2 FIG.1 showsa schematicprofile ofacutting edge ofasubstrate according to an embodimentofthepresentdisclosure; FIG. 2 is a graph depicting the magnitude of shaving resistance with a cutting distance of a shaving blade according to Comparative Example1 ofTable1 and a shavingblade according to an embodimentofthepresentdisclosure;and FIG. 3 shows a schematic profile of a cutting edge of a substrate on which a plurality of coating layers is laminated according to an embodiment of the present disclosure. [0013] The above and other objects, features and other advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which: [0012] In accordance with the present invention, the above and other objects can be accomplished by the provision of a shaving blade including a substrate having a cutting edge provided with a sharp substrate tip, wherein a thickness T16 of the substrate measured at a distance D16 that is 16 micrometers from the substrate tip is in a range from 2.41 micrometers to 3.76 micrometers. 55 50 45 40 35 30 25 5 10 15 20 CROSS-REFERENCE TO RELATED APPLICATION BACKGROUND OF THE INVENTION [0001] Pursuant to 35 U.S.C. § 119(a), this application claims the benefit of earlier filing date and right of priority to Korean Patent Application No. 10-2019-0121755, filed on October 01, 2019. 1. Field of the Invention 2. Description of the Related Art [0003] The statements in this section merely provide background information related to the present disclosure and may not constitute prior art. [0004] The shape of a shaving blade plays an important role in the quality of shaving. In particular, the shape of a cutting edge included in a substrate of the shaving blade greatly affects the cutting force of the shaving blade. Here, the cutting force refers to the force required for the shaving blade to cut one body hair. [0005] As the cutting force of the shaving blade becomes weaker, the body hair may be cut using weaker force, and accordingly the user may feel softer shaving. [0006] In general, the cutting force of the shaving blade decreases as the thickness of the cutting edge becomes thinner. However, in terms of durability of the shaving blade, the cutting edge needs to have a thickness greater than or equal to a certain value. [0007] Accordingly, it is not possible to indefinitely decrease the thickness of the cutting edge to reduce the cutting force. There is a need for a profile design of the cutting edge that may sufficiently reduce the cutting force of the shaving blade even when the thickness of the cutting edge is reduced relatively little. [0008] For conventional shaving blades, people have focused on optimizing the thickness of the cutting edge in an area very close to a substrate tip of the cutting edge, in order to reduce the cutting force of the shaving blade. [0009] Accordingly, research on the thickness of the cutting edge area relatively spaced apart from the substrate tip has not been extensively conducted. [0010] For the conventional shaving blades, people mainly focused on reducing the thickness of the cutting edge as a whole, and the correlation between the thickness of each area of the cutting edge and the cutting force was not considered. [0011] Therefore, the present disclosure has been made in view of the above problems, and it is an object of the present disclosure to find an area in which a change in the thickness of a shaving blade has the greatest influence on reduction of cutting force by studying a correlation between the thickness of the shaving blade and the cutting force and optimize the thickness of the shaving blade in the area having the greatest influence on the reduction of cutting force to effectively reduce the cutting force of the shaving blade. [0002] The present disclosure relates to a shaving blade.