Colt CT813 all Damacus folder

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Feb 15, 2003
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I just received this and am again rushing out a review.

This time it is a true Damascus blade -
and just about everything else (except for the decorative mosaic and pins that hold the knife together) is Damascus.
Even the lock-bar and back-spring are Damascus steel.

Size -
Open -


Closed -

Measured just a shade under 4" closed.

2 7/8" Damascus blade (measured to handle end) -



Those 3 pins/studs give grip/purchase to open the blade

Being all Damascus steel the knife is pretty solid and heavy for its size at 5.24oz.

It has file-work on part of the spine and back-spring -


And there's file-work on the handle opening -

and the blade is pretty well centered in the handle.

The action is good with nice lock up and unlocking -

OK....
let me back up a bit - being all Damascus - the knife arrived wrapped in grease proof paper all soaked in thick oil in a small sealed polythene bag.

So I had to be careful in opening and unwrapping the knife to prevent oil/grease getting everywhere.

Then clean the knife - I used WD-40 as a solvent/cleaner inside and out - dried it with kitchen paper towel -
lubed the joints with knife oil - then rubbed AG Russell "No Rust" (inside and out) for corrosion protection.

Then the action was good and smooth.

Test cutting - er - it was about as sharp as a butter knife -

Edge under usb microscope (~110x)




Edge looks pretty poor

I spent over 2 hours on my Work Sharp (belt grinder) Knife Sharpener to grind in a new 20 deg convex edge
and finishing on the Work Sharp Knife & Tool Sharpener - Ken Onion Edition

Edge after sharpening -




The new convex bevels are really wide because the original (laughingly called) edge was very obtuse.

The new edge looks pretty good -

How well does it now cut?

Pretty good on things like paper and shallow cuts.

But will the edge last? -
these are the usb microscope photos after 7 long cuts through corrugated cardboard against the grain.




So it looks like the edge may last -
but the cutting was not that good despite the good convex edge at 20 deg/side -
as the basic geometry was not good, giving a thick cutting profile -

and those 3 opening studs/pins get in the way of cutting through too -

It is somewhat serviceable after substantial sharpening -
it probably will hold an edge -
but not really that good at cutting through things -
any of my SAKs would run rings round it.

ubs microscope pics of
Damascus - Blade -



(original edge in corner)

Handle also Damascus -



outer brass ring of the decorative mosaic bottom right corner.




shown with the Mcusta 33D "Take" (link to review)

Still, it's an attractive looking knife and cost me less than $26 delivered -
more like a show-piece than a workhorse - it can be used at a pinch - but I am unlikely to -
but I had to have it sharp..... it's a knife (even if a poor excuse for one).

--
Vincent

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these are the usb microscope photos after 7 long cuts through corrugated cardboard against the grain.

Looking at that photo above - I can see that the finish didn't seem to quite reach the very edge.

This is despite me feeling an easily defined burr along the full length of the blade.
So I think there is a difference between when the burr first forms - which is literally just when the grinding/sharpening just reaches the actual edge)
vs. what I am looking for under a microscope - a finish right to the edge.

So since I had used the blade to cut through corrugated cardboard - I sharpened it again -
this time taking the blade to the microscope to make sure the finish was right to the edge -
but dong this the long-winded overly cautious way of making sure I got the finish just when it reaches the edge -
so as not to take off any more steel than I needed to.

Ah! but here's something I learned -

Knowing that it was one side that the finish didn't reach the edge I worked only on that side using the WSKTS Ken Onion Ed
using the coarsest P120 stock belt - single pass raise the burr, then single pass X65 - felt the easy burr - then couple of passes on X22 - same thing easily felt burr - then finally 3 passes on the X4 - with one pass on other side to knock off the burr - then finish with the 6000MM (2µm) belt - still favoring the side I was grinding - examined under usb microscope - - not quite there yet!!!

Repeat the process - this time it looked good under the microscope......

So it ought to be really sharp - right?

Not so fast!

Remember I had a bias on one side which formed the burr that I carried through the process?

It's not that there was still a burr - but the minimal grinding/sharpening on the other side - although knocked off the burr left a crude edge!!
Hence the unsharp results - unable to cut paper cleanly......

so back to the sharpener - this time doing it from the X65 single pass each side - then progressively on the stock belts - but this time even/equal on both sides -
finally gave a much better result and finish

Results under usb microscope -


this was the side where the photos shows the finish didn't quite reach the edge.

opposite side -


One can see the finish/grinding only just reach the very edge - but that is nice and clean - so the knife will cut paper cleanly -
but still not through things that well, because of the poor geometry, presenting a thick profile -
then those opening studs hinder the blade passing through.

Still it's an experience and I am quite pleased with the "knife" -
it is very good looking to my eyes/taste -
and it will now just barely pass as an excuse for a real knife!

--
Vincent

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This cheapo all Damascus folder is made in Pakistan (not exactly high rep for most of their Damascus) -
but it appears that once sharpened properly the edge may actually be reasonably durable -
even at a more acute 20 deg/side - this is of course with a convex bevel which would support the edge more.

Anyway might seem almost opposite ends of the pole -

the Moki MK-509 Aiora is one of the prettiest and most elegant folders I own -
the Colt CT813 - is somewhat cruder finish and the weight doesn't help the impression of being somewhat "clumsy" -
but in terms of just looks -
it is surprising isn't it? even when shown right next to each other -
this Colt CT813 is a looker.

--
Vincent

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