Juma

Juma is a modern and high-quality material for the production of knife parts such as handles or components and art objects.6 min


106
Juma coltellimania.com

Juma

Juma is a modern and high-quality material for the production of knife parts such as handles or components and art objects.

Since I discovered this material I can not do without it, in my laboratory it is always present in different colors.

It is a material that in terms of cost is placed in an intermediate area but certainly has an aesthetic effect on the handle of the knife that embellishes the blade, giving it an effect that you do not find with other materials.

It is produced by the German company Elforyn and is a collection of various minerals embedded in the resin.

This company has a “simple” motto related to the protection of some animal species often used to obtain materials used in different areas.

PROTECTING THE SPECIES CAN BE SO SIMPLE!

Elforyn Super Tusk uses a copy that is perfectly ivory-like, with exceptional properties and incredible optics, and our pachydermes take no risks!

Juma ® elforyn

With the creation of Elforyn Super Tusk, the most valuable and newest substitute for ivory, in addition to obtaining excellent technical and mechanical properties, it aimed to enhance an extraordinary and first-rate resemblance to real ivory.

Alongside the typical ivory grain and the annual rings on the longitudinal side, on the front are the “Schreger lines”, characteristic of ivory.

These structures are visible even in smaller applications and give a particular look.

Juma

Art versus protection of animals so that any substitute you want to use, in the end what matters is the protection of the species!

Juma coltellimania.com

Material features:

  • Machinability
    Exceptional mechanical workability e.g. drilling, milling, grinding and polishing.
  • Low risk of rupture
    Low risk of rupture thanks to a high E module and a high break lengthening.
  • Precious area
    Precious surface area for high surface hardness and low abrasion losses.
  • Unique optics
    exceptional and first-rate similarity with the real ivory, the “Schreger lines” and the veins
  • Shiny and paintable
    For the realization of shiny or opaque surfaces. Creating translucent and fluorescent effects.
  • Feel
    Very pleasant and warm to the touch due to the high content of natural minerals.

The Juma material® also has:

  • Excellent work capability such as drilling, milling, grinding and polishing
  • Low break thanks to high elasticity module and homogeneous structure
  • High-quality surface area thanks to high surface hardness and low abrasion loss
  • Resistant to many common substances such as detergents and oils
  • Low water absorption
  • It can be thermally molded in boiling water

Let’s see the Juma material with the numbers:

  • 1200 kg/ml density (DIN EN ISO 845)
  • 80 Hardness Shore D (DIN 53505-D)
  • 46.4 N/mm traction resistance (DIN EN ISO 527)
  • 15% break lengthening (DIN EN ISO 527)
  • 88 N/mm flexion resistance b-4% (DIN EN ISO 178)
  • 1680 N/mm flexion module E (DIN EN ISO 178)

Juma® Dragon Resin

Juma coltellimania.com

Your knife will stand out from the mass with this high-quality resin-based material reminiscent of dragon scales that is thermo formable in boiling water.

In this case the effect is dragon skin!

This resin is very durable.

Juma is a great material to use to make knife handles.

Unique in design and color, JUMA is mixed with different mineral bases to create a special look for your knife.

Excellent workability for:

  • Drilling
  • Milling
  • grinding and grinding
  • Polishing.

Juma coltellimania.com

 

The price of the material block is from:

  • 140mm x 40mm x 10mm is about 15mm
  • 140mm x 40mm x 30mm is about 40mm
    Juma coltellimania.com

 

Juma Gem

Juma coltellimania.com

Juma Gem, a new high-quality material, specially designed for inlaiting work but that lends itself well to the handles of knives.

It has a very fine structure that allows even the smallest intarsi.

Juma Gem is not translucent, so more intense color retention even in case of dark inclusion.

Available in eight different colors.

No limits to your creativity with this new variety of colors.

JUMA is a modern and high-quality raw material for the production of components and works of art in the knife shop but not only.

JUMA consists of a mixture of different mineral base materials composed with a resin component.

The price of the material block is from:

  • 140mm x 40mm x 10mm is about 15mm
  • 140mm x 40mm x 30mm is about 40mm

Juma Snake Resin

Juma coltellimania.com

This snakeskin pattern really makes this resin-based material stand out in the design of your knife.

Juma is thermo formable in boiling water.

This resin is very durable and is a great material to use to make the handles of your knives.

This is also a great material for the handles of knives thanks to its excellent workability for:

  • Drilling
  • Milling
  • grinding and grinding
  • Polishing.

If you want a snakeskin effect it is a great material.

The price of the material block is from:

  • 140mm x 40mm x 10mm is about 15mm
  • 140mm x 40mm x 30mm is about 40mm

Juma

Carbon Juma

Juma coltellimania.comThis Carbon Juma is a high-quality resin-based material that is unique in its design and color to create this carbon effect to the handle of your knife.

This is also a great material for the handles of knives thanks to its excellent workability for:

  • Drilling
  • Milling
  • grinding and grinding
  • Polishing.

Juma is resistant to oils and detergents and has a low % water absorption.

Create a special look for the handle of your knife with the cheeks of the Juma.

Juma coltellimania.com

 

 

The price of the material block is from:

  • 140mm x 40mm x 10mm is about 15mm
  • 140mm x 40mm x 30mm is about 40mm

 

Processing tips

The Juma material is sensitive to heat during grinding,keep Juma cool when you work it to avoid deformations or chipping.

This is an attention that is common to all Juma products but in general to resins.

The manufacturer also recommends products for the final finishing/polishing using polishing wheels and abrasive paste starting with the Mirka Polarshine C35 Juma coltellimania.com

Mirka Polarshine 35 “

Polarshine® 35 is a coarse polishing compound developed for demanding industrial and marine applications.

Suitable for materials such as gel coats, high gloss lacquers and composites.

Polarshine® 35 is a fast and efficient compound that produces a high surface shine and thus minimizes sanding phases.

This polishing compound has special emulsifier properties, which reduce the risk of dryness or overheating of the surface.

The viscosity of polarshine® 35 reduces sketches and makes it easy to use.

A silicone-free coarse-grain polished compound to remove smoothing scratches from P1200 and finer, for oxidated surfaces and for removing washing marks.

And then as a final I recommend using the abrasive pasta Mirka Polarshine T10.

Use it when you want to give your products a great finishing touch.

Polarshine 10 is the latest mono compound system.

It is a medium-to-medium-heavy polishing compound specially designed to achieve the best result after sanding with unique Mirka products.

Polarshine 10 is suitable for all paint systems and for polishing transparent scratch-proof.

It is designed to keep surface temperature low during polishing and removes marks permanently.

The Polarshine 10 is also silicone-free and can be used for both tool-based and hand-crafted applications.

All Mirka Polarshine products are silicone-free.

Juma coltellimania.com

If you then want to achieve an extra brilliantfinish, you still have to use Mirka Polarshine Liquid nano Wax.

Juma coltellimania.com

Polarshine wax is a liquid wax designed to quickly and easily seal shiny surfaces.

It’s a great product and d is yummy if you want to give your handle a final touch.

It provides the handle with a glossy finish and protects the surface but if you want a more opaque effect do not use this product.

Polarshine Lwax is excellent for easy sealing and gives shine and protection.

It is a product that you can use manually than with electro-mechanical equipment.

Important!! All Mirka Polarshine products are silicone-free.

Clearly they are all products that you can also use for other applications and are the products recommended by Elforyn for Juma products.

They are products that are also supplied in different formats and clearly also different prices.

Juma coltellimania.com

Conclusions

If you want to give a different touch to your blades, replacing wood, horns or bones, micarta,etc. is a good alternative with a very particular aesthetic effect.

In addition, using these synthetic materials avoids using animal-derived materials.

Are You Experience?

Andrea


If you liked what you read and it was useful before you leave the page share the article through the social keys that you see at the top and comments. Thank you very much!

Important! I still ask you for a little effort but for me it is useful for the project, click like on the Facebook Pageand Instagram Channel.


 


Like it? Share with your friends!

106
Andrea F

Maker and Enthusiast of Knifemaking. Other: Engineer / Professional Blogger / Bass Player / Instructor of Boxing / Muay Thai / Brazilian Jiu Jitsu / Grappling / CSW / MMA / Self Defence / FMA / Dirty Boxing / Silat / Jeet Kune Do & Kali / Fencing Knife / Stick Fighting / Weapons / Firearms. Street Fight Mentality & Fight Sport! State Of Love And Trust!

0 Comments

Your email address will not be published. Required fields are marked *

error: Content is protected !!