Dull After First Use?

Str8ShooterEsq

Str8ShooterEsq

Joined
Feb 26, 2008
Messages
200
I just purchased a small regular Sebenza. Nice and sharp out of the box and solid as a rock. Anyway, yesterday I used it to cut up a roll of insulation in my attic. Today, I used it to cut some painter's tape and it seemed dull. The tape ripped most of the time instead of cut. Can insulation really dull a knife that quickly? Any thoughts on this?

Thanks for your feedback.
 
It can`t be that bad I cut about five 90" long strips witha cold steel voyager and I was cutting on the dirty subfloor.
 
suppose it depends on the type of insulation.

fiberglass has a fairly high tensile strength, and i imagine it can be pretty abrasive to a fine edge.
 
Hey guys. I think I've posted on this forum once, but I check up on it almost every day. I don't own a Chris Reeve's knife, but I'd like one of the one piece knives in the not too distant future. As far as the dulling goes, I'd think that if you cut fiberglass insulation, than the dulling would be expected. I've seen jigsaw blades that were used to cut fiberglass, and the teeth were pretty much gone. Any type of glass is quite a bit harder than any cutlery steel, so even fiberglass insulation can dull a blade. Anyway, those are my thoughts.
 
I would try touching the blade up a bit, and then cutting some more insulation - as an uncontrolled test.

When I get a new knife, I usually use it for a while as-is. After I've had a chance to form some impressions, I regrind the edge and strop it up to suit my purpose.

That initial messing-around stage usually gives a pretty good impression of how well the knife is going to hold an edge, unless the factory edge is just really awful.

All the knives I've gotten from CRK came with servicable edges out of the box. A couple of them were really quite good, but I usually end up making changes.
 
You probably just screwed the edge on a micro level ;) just bring it right back with some 2000 grit paper. Should only take a few passes!
 
Most insulation is packed with fiberglass, which will absolutely eat through the edge on any blade. I've used two different Sebenzas extensively, and have found the edge retention to be completely on par with other S30V knives I own in regular use, despite what the sour grapes crowd would tell you.
 
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