Any Interest in Micarta Testing?

Joined
Jul 29, 2018
Messages
4
I’ve been lurking here for a short time and am probably the epitome of a wannabe knife maker. One that has recorded every Forged in Fire episode and periodically run though them when I can. I have done very little “real” research where it really counts like metallurgy and I’m sure you folks could make a long list of other things that I need to learn. Like most, I have many hobbies, some time and a mediocre budget. I have no interest in making a career change to making knives but see myself as becoming a serious hobbyists in the future. I am currently on the loooong list for a North Ridge grinder because I have bit the adage, “Cry once”. Till then, I figure do some homework and possibly take a metallurgy class.

I have recently become interested in one small aspect of building due to the availability and usefulness and that is making micarta (non-phenolic). Micarta got my attention while browsing here because I figured I’d make some scales for my few knives and some pistols but while doing some test runs I came across other uses. First, watching how-to videos I was really unimpressed with using wood for a form/press. So, understanding that HDPE is very good at resisting glues I decided to make a press out of it. I was extremely pleased with how it performed and my first run and it resulted in the tan piece shown. The other day my dang cup holder in my truck broke for the second time and I am frustrated with buying $80 replacements. I made a simple center divider with gray and black burlap measuring 3/4” thick and has met my expectations.

I made the decision to use West System Epoxy due to reading the destructive test by Fendley Knives and seeing the name pop up through my searches. I’m sure many of you already know that this stuff is extremely expensive and this makes pre-manufactured micarta online appealing. Though it is hard to find 3/4” thick material for my odd projects, this thought has me thinking and I have been wondering if it’s really worth the cost. Yeah, I know. Most micarta will withstand the rigors of using a knife but I am a sucker for items built like a tank and I own a Medford Praetorian because of this.

The reason for this post is to feel out to see if there is any interest in a test with real data on this material. I have access to calibrated equipment at work that could give us hard numbers and graph it. My idea is to get the box store polyester resin and compare it with a same size piece made of West System. In this test I could hopefully find a way to measure time, deflection and force. Living in AZ, I could also throw both on the dash of the truck and let em bake for an amount of time to see the effects of UV exposure and run the test again. I should be able to overlay the graphs for a good comparison and I’d be open to some other ideas for a test if there is interest in the community.



 
I dont think you actually explained what the test is. Bend it until it breaks?
Your right, I did not give specific details because I wanted to leave it open to extrapolate information that experienced makers would want to know. Bend till it breaks, yes. See how much deflection and force it takes until it yields. It deflects x and at y force. Or as stated, show why or why it isn’t worth the cost of West System vs polyester resin or it has been exposed to x degrees and UV exposure for y time and run the test again and compare. I just figured that I have access to calibrated equipment and was offering info if there was interest. Is there anything specific you’d like to see done with calibrated equipment that can measure and graphically show force and deflection?
 
I don't think a test is needed:
Real Micarta is very strong due to the high pressure and the phenolic resins. IIRC, it is also very stable in UV.
Homemade mycarta is less strong.
Polyester will be weaker than epoxy.

Both poly and epoxy will have some degree of degradation by UV ( poly much worse) … but that is not a real issue in knife handles.
 
Been done. Ain't bulletproof.

YsvKQKv.jpg


Did stop #8 birdshot at ten yards though:

jhjLV4c.jpg


Still, even though its not bulletproof, it makes great knife handles.
 
Last edited:
over the years i have found homemade mykarta to be very poor compared to the real stuff. the density of the home made stuff is very low. with a rasp, its filing away pine wood. real micarta is more dense and harder to file away with a rasp than ironwood. i am not sure if this is because of the phenolic, or because it was pressed in a 10 ton press so there are more layers per inch which makes it more dense. it would be nice to know what comes in second place though !
 
over the years i have i am not sure if this is because of the phenolic, or because it was pressed in a 10 ton press so there are more layers per inch which makes it more dense. it would be nice to know what comes in second place though !
I don’t doubt this one bit as I got 24 layers of burlap in a 3/4” cross section and small hand clamps vs the process of phenolic. The appeal to DIY is the limitless options and availability of color, pattern, thickness and the ability to do at home without expensive equipment. Really what a test would show is limitations of binder and cloth choice of DIY materials although it would be interesting to compare it to phenolic (and CF and G10) to see the delta.
 
over the years i have found homemade mykarta to be very poor compared to the real stuff. the density of the home made stuff is very low. with a rasp, its filing away pine wood. real micarta is more dense and harder to file away with a rasp than ironwood. i am not sure if this is because of the phenolic, or because it was pressed in a 10 ton press so there are more layers per inch which makes it more dense. it would be nice to know what comes in second place though !

Those making home made stuff are not using the best or strongest resin.

Polymer Composites makes high impact resins that are far stronger then others. I can beat on it with a hammer with no damage.

They are specialist in resins and used in aero space and many industries.

People need to step up and start using their resins if they want the strongest home made version.


 
Those making home made stuff are not using the best or strongest resin.

Polymer Composites makes high impact resins that are far stronger then others. I can beat on it with a hammer with no damage.

They are specialist in resins and used in aero space and many industries.

People need to step up and start using their resins if they want the strongest home made version.


Looks like a worthy product. I’ll be giving it a try and thanks for sharing.
 
I don't think a test is needed:
Real Micarta is very strong due to the high pressure and the phenolic resins. IIRC, it is also very stable in UV.
Homemade mycarta is less strong.
Polyester will be weaker than epoxy.

Both poly and epoxy will have some degree of degradation by UV ( poly much worse) … but that is not a real issue in knife handles.

Yep. ALL Plastics, and basically all organic compounds ever will break down in UV light. But Phenol formaldyhde "The phenol of phenolic resin" is abnormally resistant.

Having a benzene ring it can dissipate high energy UV light better than basically any normal plastic.

Polyester resin is highly susceptible, and will break down quite quickly in direct UV.
 
To address your original post I say go for it. It sounds like it's something that interests you and so why not do it, if for no other reason than to satisfy your own curiosity. The only suggestion I would make is to also test some industrial micarta as well.
I can't speak for everyone here, however, I don't think this is an unresolved issue or a question a lot of makers have. That is, can home made mycarta perform as well as industrial. Industrial Micarta has been around for a long time and has been used for knife handles a long time as well. If you use the Bladeforums search engine you can pull up dozens of posts about homemade "mycarta" I think you'll find there are some that still make it, most don't because in general it's just not as good.
For me personally, I've worked with a number of different types of micarta and I prefer industrial type micarta. It's more dense there are fewer voids.
But it'd would be interesting to see your results so please share them!
 
I'm interested in your findings and processes of making it.
 
Back
Top