Is this blade damage on ZT0456?

[Bigfattyt]

Leave

Leave cardboard for razors my opinion, cardboard is vey abrasive.

I have 3 or so cardboard cutting replaceable razor, locking knives. I hardly ever use them for breaking down boxes!

I like more blade length. And I'm much more apt to be caring an opinel or other traditional knives that work fine.

I do use the folding razor blades often to cut thick leather, and vulcanized spacer material for knife handles.