Handle/slabs materials - properties, cons & pros?

Anybody have first hand experience dropping a mammoth covered knife? I don't own one, but assume since it's fossilized it would not handle a drop on a hard surface very well?

The mammoth ivory that is dug out of the frozen tundras and wastelands of Siberia etc isn't fossilised -just old.
If it was fossilised it would not be ivory anymore but rock and minerals which get laid down in the impression left by the tusk/bone/ in the mud about a bazillion years ago.Like a cast .
With that in mind it must be pretty tough stuff to last 10,000 years since the last mammoth drew breath.:)

Another great looking and durable material is Rams horn-variation is huge between different breeds of sheep too from what I've seen -other factors would be age of the ram ,size of his horns,diet , usage etc.
 
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Any type of horn will shrink. I have stag and rams horn that have shrunk. To reverse the shrinkage, I soak the knife handles in mineral oil in a zip lock bag for a couple of days.
 
Living in Scandinavia, it's very cold outside but very hot and dry indoors. This certainly, low humidity sometimes only 11%, will effect natural materials. But once 30%+ humidity is regained- I use a humidifyer- any shrink grows back. Horn suffers, so too stag and bone, wood least which is surprising. Delrin doesn't, so it's the tough yet light one.

As a new tip. I've found that Coconut Oil (the trendy health food..) is really nice for putting a shine on natural handles, I'd avoid soaking stuff for long in mineral oil, more than overnight anyway, it can degrade stag or cause the brass liners to bleed, in my experience at least.
 
Living in Scandinavia, it's very cold outside but very hot and dry indoors. This certainly, low humidity sometimes only 11%, will effect natural materials. But once 30%+ humidity is regained- I use a humidifyer- any shrink grows back. Horn suffers, so too stag and bone, wood least which is surprising. Delrin doesn't, so it's the tough yet light one.

As a new tip. I've found that Coconut Oil (the trendy health food..) is really nice for putting a shine on natural handles, I'd avoid soaking stuff for long in mineral oil, more than overnight anyway, it can degrade stag or cause the brass liners to bleed, in my experience at least.

can cause brass liners to bleed? :eek: whats that mean?:confused:
 
Brass can corrode/oxidize. It creates a green slime like corrosion (verdigris) which on stag and light colour bone can tint it green. My experience with mineral-oil makes me believe that this brass bleed or green leeching, can be accelerated by prolonged soaking.
 
Brass can corrode/oxidize. It creates a green slime like corrosion (verdigris) which on stag and light colour bone can tint it green. My experience with mineral-oil makes me believe that this brass bleed or green leeching, can be accelerated by prolonged soaking.

thanks! yipes and i love stag, bought my 4th stag GEC two weeks ago. gotta make sure they stay safe! thanks!
 
It's one reason I have reservations about brass - it stinks too! So I generally prefer steel, stainless or nickel-silver liners.
Your knives should be OK if you avoid excessive wet.
 
It's one reason I have reservations about brass - it stinks too! So I generally prefer steel, stainless or nickel-silver liners.
Your knives should be OK if you avoid excessive wet.

that actually explains why my Queen #11 smells. i asked on the queen thread and just looked at it. brass liners. the brass in my harmonicas arent funky but this queen 11 honey amber stag smells kinda funky. hmm never noticed, gonna need to check all my gecs when i get home from work
 
I have only soaked two knives. One was over night. That was a stag barlow. It is fine now. The other was a sheath knife with rams horn handles. I soaked that one two days. Stainless steel so no issues with brass. But I did wipe both knives down for two days to get most of the oil off only leaving a thin coat for protection.
 
I have only soaked two knives. One was over night. That was a stag barlow. It is fine now. The other was a sheath knife with rams horn handles. I soaked that one two days. Stainless steel so no issues with brass. But I did wipe both knives down for two days to get most of the oil off only leaving a thin coat for protection.

yeah i figured a full 1095 carbon knife would be interesting. some one posted their very interestingly patinaed knife. they live in the desert so the humidity and sweat, turned the exposed part of the blade black, the spring black. if the scales and bolster were 1095, i suppose theyd have a patinaed black knife, which is pretty cool to me.
 
I don't buy a slipjoint unless I plan on carrying it and cutting stuff with it. I'm clumsy, and have a habit of standing up with knives on my lap at home. I have a lot of different handle materials, so I've carried a lot of different handle materials. I use them, but don't tend to abuse them.

That being said.

Buy a nice knife and use it!! Carry it and treat it like the knife it was designed for. If the manufacturer put it on the knife, it should be good enough to use as a knife. That's why they are the professionals. If they are still in business you can probably get them to fix it for you. If it's an old knife- then look at how long it's lasted!! All of these knives were collected in two handfuls and brought downstairs for the pics. They are nice, but still just knives.

These are some old user knives of mine.
Blackwell (horn), Skelton/Hartkopff (Stag- the Hartkopff is the only pictured knife I haven't used, because it's too hard for me to access the blade nail nick), Hibbard Spencer Bartlett & Co./Kabar (wood) , Boker(ivory and black lip mother of pearl as far as I can tell), Dorwal, Keen Kutter (bone)
F1EACF95-8D58-436D-B982-D9D2E63DAF1E.jpg


My personally used "fragile" handled knives. The "Zebra" ivory knife is actually my daughters, but she chooses it for me to carry quite a bit, even after I gave it to her. The wharncliffe ivory was lost outside the night I got it after falling out of my pocket during a roll.
GEC (Stag), Lloyd (ivory, wood), Tham (wood), Bear MGC/Walter Kayser (MOP)
6257157D-D1DC-4CDC-8CD4-35ABE1DC41B3.jpg


I'm not throwing these knives at walls or anything, but they are a good representation of knives that have been used and have borne no true ill effects. Many are shadow or barehead without much of a problem either. Most knives I see have more issues with the blades than handles. I live in a dry environment too, and find that it takes an initial time period to see if anything shift drastically, and I've never had an issue with slipjoints.

I'm willing to bet that if you carried a knife and it developed an issue, that it would be easy to find another for your pocket whilst the original is getting repaired....😉 I find it can get too worrisome thinking about the handles. A good manufacturer will make the handle a good shape for retention and finish the material to an appropriate grippiness. Smooth bone/wood/Pearl will all be slipperier than jigged bone or stag. I don't use my mammoth knives to cut greasy hoses or get them soaked in antifreeze or anything, but they are strong enough in my examples to withstand multiple drops, capable enough that I don't worry taking them camping if I want, or carrying everyday.

I haven't done it with stag, but I soaked some pieces of the sameold bone cover in mineral oil for 1,2,6 and 12 months and noticed no difference in any piece at the end. All pieces were the same hardness, no warping or degradation. All pieces were kept in the same bag until removed, then dried, checked for warp/colour change/and scratched with the same nail each time, then placed in a bag with the other removed dry pieces until the cessation of the year, and scratch tested again. I had heard not to use mineral oil on bone from a respected member of BF, but wanted to test for myself.

Interesting to note that there may be issues with stag. Will, could it be that the prolonged soaking is just letting more of the currently existing vegridis to work its way out thanks to capillary action along the scale/cover borders. Did you notice it creeping up the pins? Or more just getting into the mineral oil solution and dying everything green? I've luckily never noticed this and I've given most new old slipjoints a couple of day soak before cleaning/sharpening. Thanks for sharing!
 
i am also of the opinion that verdigris has been only helped to leech out by the oil.

Cutslikeakris, i am happy to see someone is not afraid to use his knives, even if they are pretty!!! :thumbup:
 
It could be that the verdigris was escaping due to 'oil liberation' yes.

But, the knives afflicted were newish ones from CASE and GEC not some old tarnished horrors:eek:

Kris, that Stag Pruner's a treat!:cool:
 
Some types of Oil can turn rancid with time, vegetable oil and olive oil are two examples of this. Some types of oil can turn yellow and gummy with time, Hoppes Gun Oil is an example of this. I've also been told that Stag, being very porous, can turn soft and mushy with extended soaking or extended generous applications of oil. I use only Food Grade Mineral Oil on knives and recommend some type of wax for Stag.
 
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Go my knowledge all vegetable oil turns rancid with time. That is one of the reasons why only mineral oil (with some bee's wax) is recommended to be used on wooden cutting boards. That comes from some of the most experienced cutting board makers whose knowledge and experience I respect.
 
While I indeed admire elephant ivory, I would not buy a product made out of it, as most of the ivory traces back to poaching. I am actually surprised that there are still knives being made with ivory handle. Indeed - there are some old stocks that were 'legit' (what ever that means), but still, it is getting harder and harder to sell/export/import products made out of ivory, I am not sure whether it is worth the hassle.
Ivory has been used since the beginning of mankind and some tools still exist centuries after. Now, it is happily forbidden to kill to get ivory. But elefants are not the only to wear ivory. There's a lot of other species. OK not a reason to kill them. I have read somewhere that in South Africa they cut rhino's horn to prevent poaching. In India they used to have domesticated elefants. I see no reason not to use their tusks when dead.
As far as durability is concerned, imho ivory will be hard (pun and no pun ) to beat. Perhaps ironwood?

The mammoth ivory that is dug out of the frozen tundras and wastelands of Siberia etc isn't fossilised -just old.
If it was fossilised it would not be ivory anymore but rock and minerals which get laid down in the impression left by the tusk/bone/ in the mud about a bazillion years ago.Like a cast .
With that in mind it must be pretty tough stuff to last 10,000 years since the last mammoth drew breath.:)

Another great looking and durable material is Rams horn-variation is huge between different breeds of sheep too from what I've seen -other factors would be age of the ram ,size of his horns,diet , usage etc.
:thumbup: In the region of Nantes (and probably elsewhere in the world), some forrest (oak in that instance) have been flooded several thousands of years ago. The trees can be found only few meters under the ground. The wood has become hard like a stone, but if left alone drying it will break. We call this morta and it makes very nice handles.
http://www.couteaux-morta.com/couteau-morta-clip-de-presentation/

[video]https://youtu.be/HxE3hPegMF0[/video]
 
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That was an interesting video. Thanks for sharing!

This reminded me a lot of river wood and petrified wood.
 
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