u/BrainDowntown3646

1095 differentialy hardened hira zukuri blade. never used it I stored it in the stryrofoam box it came with sideways for about a month. it seems gravity did its job and as you can see If I lay the blade on top of flat surface there is a severe curve so much so that it is casting shadow. anyone who experienced same problem? how can I straighten it out? I am afraid break it if I apply force the other way. Thank you in advance.