Showing posts with label craft. Show all posts
Showing posts with label craft. Show all posts

Wednesday, June 8, 2016

Home Front: making braided rope


I wanted to have a go at making rope from plastic bags, a project I had seen online from a few sources, like MAKE magazine which I had a subscription to for some time (thanks Wombles) and Instructables, both excellent sites for finding crafts to engage in, especially to check out a range of ways to do similar things. There are certainly projects that would suit a range of needs, check them both out.

I started collecting plastic shopping bags when we went shopping, bags I would have ordinarily recycled either when we did our fortnightly recycling bin, or back to the supermarket to the dedicated bag-recycling point. I also had a friend bring a butt-load of them as well.

The primary construction of a strand of bags rope is to cut the bag from the bottom of the handle loops, on both sides, down to the bottom sealed hem. this gives you a double loop of plastic fabric, that is very sturdy in the up-down axis.

It's possible to then loop one bag into another with the working bag looping through the exposed loop of the standing bag, and then through itself, and when the knot is sured up, a very solid join is made.

Repeating this process, with a fresh bag being looped into the end of the standing end, the chain is continued for as long as you want. I wanted to braid my strands, so I created three fifty-bag chains, and lined them up. This was a mistake.

I found that having the full lengths meant that when I was braiding the lengths were constantly getting tangled with each other.

My solution was to bundle up the three lengths into some of the heavier bags I had left over. These gave me a far more manageable bundle to braid with, but were still bulky.

A far better idea would have been to make short lengths of 6-7 bags long and added more as the braid progressed.

One trick is to ensure that the three chains are off-set such that the knots don't bunch up in the braid, and this gives the rope something that ALL "primitive" non-monofilament ropes benefit from. Weakness in individual strands are overcome by the braiding (or twisting in twisted ropes) and whilst there may be individual components of the cords that have damage, or weak points, the overall effect balance that out, and supports itself.

One thing I found during the braiding process, I encountered many of the sides of the cut edges hanging outside the braid, and these tags of plastic can be woven back into the rope fairly easily. Where I could, I knotted them and ensured they would not spring loose. I could have twisted the chains in order to capture the tags, but that would have increased the effort needed to make the rope considerably. All in all, once I had my three strands of chained bag-loops, the weaving process took around an hour, and was a reasonably simple process. Keeping a uniform braid is the key aspect for this, and those first few meters were the hardest to keep even, mostly because of the super-long chains I started with.

Making the chains was another time consuming but simple process, light work made quick by my Big Wet cyberpunk pals one evening as we watched John Wick (epic, awesome movie!) one evening. Ensuring the side-seam cut was correctly made, and didn't cut too far to either side, leading to failure of the loop, was one problem, and lead to some wastage. Generally, the plastic gags were remarkably robust, and the chains themselves were quite sturdy, especially if given a slight twist to gather them up.

Once braided, the resulting rope was really quite sturdy. I was able to loop it over a post and pull on both ends with all my strengths without any problem, and lean back with all my weight on it. I had hoped to get some better way to test it, but I'd say that for a static load, they are quite stable. I suspect they could be used for any number of lashing, binding or dragging tasks, but I wouldn't want to use them for any life-sustaining tasks unless there were no alternative.

So, from approximately 150 bags, I made a 10m length of braided, 3-strand chain rope, purely from salvaged shopping bags. None too shabby.



Wednesday, April 6, 2016

Review: SAR GlobalTools - kiridashi



The traditional kiridashi knife is small and very portable blade from Japan, with a chisel grind and a sharp point, used as a general-purpose utility knife. These knives are carving/utility knives have their roots in woodworking. The name, kiridashi literally translates to “carve out” which would seem to support this origin. Regardless, they are found in many facets of traditional and contemporary Japanese culture being used in a variety of activities from everyday tasks like sharpening pencils to gardening.


They are often made with a handle wrap and sometimes scales and a scabbard, but are just as likely to be a single piece of steel.

This take on the classic is from my mate Spencer Alan Reiter of SAR Global Tools who works his metalworking magic from a shed in Louisiana and has brought forth such wonderful items as the Moonglow necklace signaling tool I wear 24/7, the SESS signalling dogtag I keep lashed to all my packs, and my favourite neck-knife, the OddJob.

The SAR kiridashi's are all one-offs, that Spencer builds from reclaimed stock left over from his other projects. Waste not, want not, and perfect philosophy for the creation of a kiridashi. The riddle of steel  rings in his ears.

Crafted from an offcut of CPM3V and is heat treated to a hardness of "dead nuts" 60HRC according to Spencer.
It's also sharpened to a razor blade edge along both its main cutting edge and to a very sturdy and substantial point. The geometry of the SAR kiridashi is is very similar to a scalpel and being one piece CPM3V its 165mm length it weighs only 30g, very dense and very good in the hand. With two holes drilled in the head of the blade for a mass reducing effect and three grip-enhancing drilled notched behind the head, and another in the tail end as a lanyard hole.


Worked over in the SAR workshop, you can easily use it knowing that you are using a high quality product.  You'd never know it was a one off recovered from workshop scrap. In keeping with the kiridashi's main purpose originally to be used as a craft knife, I wanted to show off it's practical application and the single, flat ground chisel edge which just works a treat as a wood whittling tool.

The blade can put it to many different uses. Here are some practical examples: general cutting, gardening, cutting zip ties, deburring and drilling holes, self defense, survival tool, the uses are almost innumerable. Anything you could want from a heavily over-engineered craft-knife. 

The SAR kiridashi's are set with a cord-wrap on the handle for enhanced grip on the thin metal spine, and come with a kydex scabbard along with a bead-chain necklace for neck-knife wear. 

Bear in mind that these are all hand-crafted, heat treated and sharpened in what is essentially a one-man shop, along with Spencer's philanthropic work in conjunction with the Run Rangers Run charity, in creating his Inglorious Bastards knives, re-purposed from antique files, so his time is hard to come by and the runs are small. Keep an eye out and be on the lookout for new knives such as the Kingfisher's that are coming out...

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