Wednesday, January 19, 2011

Cannot decide what to do next

 As my current project is about to enter its third and final phase, I am already thinking about what to make next.  I have several designs on the burner.  The problem is, I like them all, so I cannot decide what I should work on next

This curved dresser is based on the same curve that I used on my Asian Wall Shelf.  I imagine that the top will probably end up a jewelry box that flips up, revealing a mirror.  Perhaps this piece will evolve into a negligĂ©e dresser.
This would be an exceptionally challenging piece, since I am not sure how to make left side of the drawers, nor am I certain how I am going to make such a large curved panel.
As planned, the base wood is Honduran Mahogany, and the drawer fronts are Mappa Burl veneer.
This piece would be for sale.


This piece would be to replace my current kitchen table, the only significant piece of furniture in my house that I have not made.  We are casual diners, and this kind of table better fits our lifestyle.
The planned base wood is Honduran Mahogany, and the trim and stool seats are Wenge'.  I have not figured out what to do with the top just yet.  Either it will be a simple veneer, like curly Sapele, with some inlay, or a busier veneer, like some Mahogany crotch. I think I need to stay with something close to Mahogany because additional contrast will compete with the contrast between the base Mahogany and the Wenge'



This piece is a 100% selfish piece, just for me, and as such, it has been postponed again and again for the last three years.  In fact, I have even had the wood for it that long too.   The idea is that of a more modern Morris Chair, with bent laminated arm rests, Lignum vitae hardware, and an open frame.  As well, I strayed from the traditional Oak and plan to use Leopardwood with Lacewood veener accents.  I am considering adding a little inverted taper to the legs to make it look a little more modern and light.



So that is what's on the table.  I have all the wood for all these pieces in inventory, so there is no holdup there.  The dresser would certainly be challenging and it may be good, career-wise, to have a second piece for sale.  The Bar table is perhaps the least in new challenges, but has a definite cool factor.  The Morris chair is deceivingly challenging because of the mechanics of the moving backrest, and would give me a place to chill at the end of the day.    It is really hard to decide, but then again, it is hard to complain about such a problem.

Tuesday, January 18, 2011

Low VOC Dangers



It is hard to read an article about finishing wood, these days, without some mention of "low VOC's".  These articles vaguely characterise these low VOC finishes as somehow good for humans.  It reminds me of those Life cereal commercials that I grew up with:


  "What's that?"
  "Some low VOC finish; supposed to be good for ya"
  "You gonna try it?"
   "I'm not gonna try it!  you try it"
   "I'm not gonna try it."
   "Lets get Mikey"
   "Yeah!"


Anyone who has read such an article gets the gist: that a low VOC formula contains lower quantities of harmful stuff that evaporates into the air. The key thing to remember here is "into the air", but I will get back to that in a moment.  The burning question that I had is: "What are they putting into these formulas instead?

A little time spent Googling, and I discovered something called "exempt solvents".  There are certain solvents that can be added to solvent based finishes, solvents that evaporate just as well as the solvents in standard lacquer thinner, but that do not count as part of the VOC emissions of the finish.  The most popular "exempt" solvent seems to be acetone.   Huh?  That's right, a manufacturer can load up solvent based finishes with acetone without adding to its VOC rating.

So why is acetone exempt?  After all, it evaporates quite readily.  The answer is simple: because acetone vapor does not "go up" into the air.  Acetone vapor is twice as heavy as air, which means that it collects along surfaces.  This adds an additional danger when using such low VOC finishes.  If acetone vapors have no place to escape, they can collect and build up on the floor, posing a risk of explosion.  (Consider that most home-made finishing booths are constructed with the exhaust fan off the ground.)

I could go on and on about all the different exempt solvents, and their particular safety caveats, but I am no chemist and that is not the point of writing this article.  The point is: Do not assume that low VOC finishes are any safer than their high VOC sisters. (One could even argue that, due to exempt solvents, low VOC formulas simply move the pollution from the air to the soil and water, but that is another article.)

Although I have been primarily talking about solvent based finishes, I cannot exclude water base finishes.  Do not automatically assume these are "safe".  They contain, for instance, glycol ether, which I have read varying opinions about its toxicity.

One last note, a disclaimer, before I run.  I want to make clear that I am not a chemist, and as such, I am partly speaking outside of my field of expertise here.  I culled the information for this article from the research that I have been doing for the purpose of keeping myself safe, and want to share what I have learned with other's so that they may stay safe as well.  If you are a chemist, and want to add something, please, by all means, I invite you to add a comment.