Sunday, December 19, 2021

The Bubinga Lottery

The task of bending the sides gave some cause for concern when I decided to use my one and only set of Bubinga recently. I was already aware that bending this wood can pose challenges, and on researching the topic it became apparent that unhappy accidents are commonplace. To mitigate the potential for disaster, I took the cautious approach and doused the sides in Supersoft veneer softener and shrouded them in plastic for a couple of days before unwrapping them and allowing them to dry completely prior to bending them.

 


When I finally took the plunge and inserted them in my Fox bender, sandwiched between layers of damp craft paper and wrapped in aluminium foil, I cranked the temperature of the heating blanket up to around 320F and allowed them to cook at that temperature for a good ten minutes. When the sides had cooled to room temperature and I was able to remove them from the bender, I found that they'd survived the ordeal with no sign of the cracking or faceting that others have experienced.

What I've learned about this wood is that there are several Guibourtia species marketed as Bubinga, which perhaps explains the variety in appearance encountered between individual examples. With the sides successfully bent to shape, I've concluded that either the precautions I took contributed to my success or that the particular variety I'm working with tends to be less troublesome than other species. With Bubinga now listed on CITES and therefore no longer available in this country, I guess I should count my blessings as I forge ahead with this guitar, safe in the knowledge that I'll never have to deal with it again.


Cheers

Pete

Saturday, December 18, 2021

Australian Blackwood/Engelmann Spruce OM

In terms of figure, this Australian Blackwood might rate as a "AA" back-and-sides set; however, there's enough contrast and colour present that it's perhaps deserving of a more generous assessment.

After a years-long break from building, this guitar is proving to be an exercise in rust removal; I'm feeling the need to think carefully before proceeding from one step to the next, re-assessing processes that were once second nature.


The degree of difficulty has been increased due to my decision to laminate the sides (using inner layers of cherry veneer), and redesign the head block to provide better support for the fretboard extension.

Because the sides are laminated, the individual layers from which the sides are composed will be exposed when a soundport is cut out which, to my way of thinking, will look unsightly. With that in mind, I plan on binding the soundport, which necessitates that I build a jig as a next step that will allow me to use a laminate trimmer to route out the soundport, guaranteeing a flat gluing surface around the port's edges for the veneers and binding. Bending, gluing and clamping those veneers and binding will pose yet another challenge.

So far, so good!


Cheers

Pete

Bridge Day

With a template describing the bridge outline, and an appropriate jig to facilitate routing of the saddle slot, it's a fairly quick and ...