What are the BAD things to cut with a knife?

[KennyB]

Denim.

Yeah, denim was very surprisingly bad. It just wear down an edge to dull in practically no time

 

[zl1]

bags of mulch

 

[darkangel55555]

People. Doing that will separate a blade from its owner real quick.

Me. Attempting this is generally considered unhealthy for a knife owner.

High speed machinery. Metal-on-metal especially is associated with a high proportion of penetrating injuries to the eye.

Things that sharpen steel. Ceramics and stone and synthetic waterstones will dull a blade real quick, just as they'll sharpen one quickly if applied at a sufficiently acute angle.

 

[GarnetandBlack]

lunch lines.

 

[goodeyesniper]

steel that is harder then your knife!

hell, cutting steel that is SOFTER than your blade is still usually a bad recipe since your edge is so thin compared to a piece of structural steel or whatever.

 

[dragonsprayer]

one of my old friends tried to cut through a concrete cinder block with a spyderco police I sold him. It didnt last long. The edge that is. He got about 2" into it before it just wasnt even creating dust anymore. But he resharpened the knife and still used it. Though it was a plain edge by that time. Sad thing was it was literally 3 days after I sold it to him. When I asked why he did it he said it was his plan all along. He knew how much I liked the knife and wanted to see how bad I would squirm.

dude that sucks!

 

[Tony8179]

Those big damn staples in boxes that are usually hidden under tape.

 

[blame it on god]

The copper/brass looking thick staples? Yeah, those do suck.

 

[Huntsman Knife Co. LLC.]

Cutting anything on a ceramic dinner plate. Always use a cutting board

 

[FlaMtnBkr]

Insulation will kill an edge quick.

 

[Scottie3000]

Those big damn staples in boxes that are usually hidden under tape.

Those have probably killed more of my edges than anything.

 

[IndeliCutter]

Absolutely ceramic

 

[KDUJ]

Tyvek

 

[Grease]

Don't ever try to cut up a scotch bright pad. That stuff is just mean.

 

[Cyo]

Corners. I've seen so many knives where they cut corners and they are damn near useless.

 

[Locutus D'Borg]

Avoid cutting sheets of tungsten carbide.

 

[Omega Leather Works]

one of my old friends tried to cut through a concrete cinder block with a spyderco police I sold him. It didnt last long. The edge that is. He got about 2" into it before it just wasnt even creating dust anymore. But he resharpened the knife and still used it. Though it was a plain edge by that time. Sad thing was it was literally 3 days after I sold it to him. When I asked why he did it he said it was his plan all along. He knew how much I liked the knife and wanted to see how bad I would squirm.

I had a friend like that. On one hand he was the best friend ever, on the other, the worst! He even tried to break up my marriage. Guy was sardonic.

He's gone now. Permanently. RIP Dave, you miserable bastard.

Thanks for the tips guys. Some of this stuff I wouldn't have thought twice about. Tyvek? Interesting.

 

[DShiflet]

People. The law tends to frown upon that.

 

[Chris Larrikin]

I am at my soon-to-be in-laws' house and I know I shouldnt post my first thoughts in answer to the thread title...
Help!

 

[phillipsted]

People. Doing that will separate a blade from its owner real quick.

Beat me to it.

TedP