I’ve heard that the work hardening makes it more challenging to apply copper as if you mess it up, it’s challenging to redo. At what point should a beginner step up to copper for their conifers?
Aluminum and copper wire have different characteristics. One is not necessarily better than the other, nor at todays pricing is one more expensive than the other in my expereience. The aluminum is generally easier to obtain due to the annealing process used to prepare for easier application for Bonsai purposes.
For those who would like to explore the myths of Wire use in Bonsai I recommend Michael Hagedorn's "Bonsai Heresy." pages 221`-234.
His explanations and references are clear and concise.
If you are wiring conifers that is the point I would recommend using copper! The strength is an advantage allowing you to use a smaller diameter wire than aluminum, the aesthetics of copper with age leaves a more pleasing look for display. And yes, wiring is often present when show trees are on display at even the highest levels such as Taikan Ten and Kokofu.
Aluminum has the advantage of softness and is very effective in larger diameter for soft barked deciduous. I also prefer aluminum for securing trees in pots.
I have not purchased bulk aluminum wire for production but I have purchased bulk copper for annealing and use in Bonsai. The annealing process is both simple and complex when working towards the best results. The temperature reached in the annealing process and the time spent ( based on gauge it varies) will change the resultant quality. Raw copper prices have increased greatly in the last five years. I noticed significant supplier price increase with each bulk order even when ordered within six months of the previous order. Most bulk rolls begin in lengths of 1,000 feet and up. Wholesalers usually base their pricing on minimum bulk orders ( combination of number of rolls and combined length) with pricing slightly cheaper for very large orders. Sizes that are mass produced and in high demand are considerably cheaper #10, #12, #14 than the sizes at either end of the spectrum #22 or #4 .
A major factor is shipping due to the weight of copper in comparison to the weight of aluminum. the Canadian market pays much higher shipping costs than are available in the USA. ( economy of scale) As a producer one way to moderate the cost is to provide kits that meet varying needs. For most beginners I suggest the "Starter Set" which consists of the middle range of sizes. Basically five sizes # 16, #14, #12, #10, #8. The second set is what I describe as a full set including nine sizes from #20 through to #4. So one roll of each. #4,#6,#8,#10.#12,#14,#16,#18,#20.
Pricing is generally comparable from most suppliers due to similar cost of acquisition and production. I would suggest the best value can be obtained from your closest supplier due to shipping costs and ease of procurement.
Just for comparison a full set is priced @ $225.00 CAD, Starter set $125 CAD. ( does not include shipping)
Note: for proper comparison one should consider length of wire included in each size and the range or number of sizes. It also helps if you understand the variation in cost dependant on gauge.
This is not a sales pitch, simply posting information from a production point of view. Most of the larger bonsai clubs can put an enthusiast in touch with a local supplier.
