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New acquisition - delrin or bone?

akadave2 said:
Why dont you see jigging like that anymore?
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The jigging is not the same, and the coloration of bone is a lot different too. If you want a really good example, look at an early Case red bone knife, and the current red bone offering. Not even close.

IIRC, an easy way to tell if the Case was delrin is, the jigging usually goes almost all the way to the bolsters. The bone knives usually stop a little short. Although it is not always the case. Case delrin usually has a much different color to it as well.

Yours is definetely bone.
 
Just to illustrate a couple points made above about shields and jigging, here are two of mine, both from 1978.

The 32 jack is bone:

6232mark.jpg


The 44 stockman is delrin:

6344closed.jpg
 
ranchmanben said:
1974 was when they started using a different shield for the composites and wood handled knives. That said, I would definatly say that your knife is bone.
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That seems to make sense; may be more about vintage. The 'circle' in the shield isn't a guarantee of bone on some older knives. I'm looking at three of my older Case knives; one is a 1965 Folding Hunter in jigged laminated wood, another is a 1970 Folding Hunter in wood, the third is an XX-era yellow synthetic-handled Peanut (1940 - 1964). All have the 'circle' in the shield.

I have a 1976 'Elephant Toe' 6250 Sunfish in jigged wood, and another Folding Hunter (1981) in jigged wood. Both of these feature the oval shield minus the 'circle'.
 
yes you did . I went for another look thinking "what IS he on about?". most amusing.
 
we often have similar questions regarding Philippine-made balisongs. Is delrin susceptible to the 'hot needle' test? that's how we distinguish plastic from bone.
 
hank_rearden said:
we often have similar questions regarding Philippine-made balisongs. Is delrin susceptible to the 'hot needle' test? that's how we distinguish plastic from bone.
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having never done it myself delrin is plastic so i would assume it would but then you have a delrin handled knife with a tiny burnt hole in it:eek:, Levines forum has had many a discussion on the destructive pin test, especially in regards to ivory vs. ivory looking celluloid, ya wanna get mr levine going that'll do it:).
regards
gene
 
hank_rearden said:
we often have similar questions regarding Philippine-made balisongs. Is delrin susceptible to the 'hot needle' test? that's how we distinguish plastic from bone.
Click to expand...

Sort of along those lines, I noticed that a Dremel with a cotton buffing wheel & compound will very quickly overheat & melt Delrin or similar synthetics, if not careful. Need to maintain a very light touch, and always keep the wheel moving across the surface (don't linger in one spot for more than a second or two). I've 'accidentally' put some shallow furrows in Delrin that way. The upside is, so long as the damage isn't too deep, the same method can be used to re-shape & fix it. It can also be easily sanded back into shape, which is obviously less risky. ;)

Bone is much more resistant to the extra heat, and rather difficult to damage in the same manner.
 
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