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aliris19

Catalyzed finish

15 years ago

My latest puzzle has been finish or varnish for cabinets. I have received a whole lot of wrong information. I would like to post what I think I have worked out to be correct and would like to invite anyone to adjust the record if I have it wrong.

First, is varnish the same as finish? Many salesmen seem to assert quite authoritatively that it is, but the mild-mannered, experienced custom cabinetmaker I was speaking with lately was rather puzzled by the question, finally settling on "no", and I understand now why he was puzzled. A varnish is a class of finish; there are many other types of finishes than varnish. But 'finish' and 'varnish' are not equivalent or analagous terms, the latter is a subset of the former. It is a testament to the persuasive powers of these salesmen (and my gullibility) that I was believing them over the actual worker.

But here:

http://www.google.com/products/catalog?q=cambro&oe=utf-8&rls=org.mozilla:en-US:official&client=firefox-a&um=1&ie=UTF-8&cid=3825318520796488083&ei=CJpLTcHVBYa0lQfsmpw8&sa=X&oi=product_catalog_result&ct=result&resnum=7&ved=0CGsQ8wIwBg#

is a link to a professional finishers article that really lays out how these terms differ. It is a very interesting read! Some brief highlights abstracted:

A finish, I believe, is a general term for a variety of products and processes designed to protect and burnish a piece of wood.

A varnish is a specific type of finish that utilizes synthetic resins in addition to oils to cure wood very durably. Protection and durability is achieved via polymerization, a natural process of curing that oils facilitate (which by themselves are considered another class of finish), and which is amped up by adding synthetic resins.

"Catalyzed varnish", I believe, is a misnomer - the catalyzing agent is an acid in the form, often, of urea formaldehyde (isn't that the baddie we were all trying to avoid in press board???). It is added to a lacquer, not a varnish. Lacquer is yet another class of finish (there are many besides these mentioned here). I think it is easier to apply than varnish; varnish is more durable. Among all the finishes there is a tradeoff between such considerations as application, safety, durability, etc.

The catalyst added to a lacquer initiates a chemical reaction, resulting in a more durable finish than is achieved from lacquer applied without the catalyst. Thus the catalyst confers the durability of varnish, in the easier-to-apply lacquer finish.

This durability comes at a price to the environment and I am guessing, our health in the form of long-term off-gassing from the formaldehyde-catalyst? This I don't know for certain, but I seem to recall that formaldehyde was the culprit avoided with low-VOC plywood. So I guess it's possible that taking delivery of a product finished in this way suggests a tradeoff with one's personal concern for the environment and possibly the long-term health of the kitchen's inhabitants. Dunno; about this I plead pretty thorough ignorance.

So now, a question. It seems pretty well agreed upon by all that a catalyzed finish is best. How necessary is it? My cabinetmaker hazarded a guess of 10-15% more protection. Is that worth the environmental and health hazard? Can anyone speak to this? I'm not even sure the catalyzed lacquer can be applied here (legally) in California... [though according to this guy there are California-compliant finishes that are just fine: http://www.carltoncabinets.com/FAQ.htm]

I've heard it claimed that the 'baked' aspect of the big-guys' cabinet's finishes is just fear-mongering, that heat just speeds up the drying process but the real durability is conferred by the chemical catalytic reaction, independent of heat.

Which, btw, reminds me: someone wondered aloud why so many of the big cabinet makers seemed to be located on the east coast, never in California. It may be that the air quality laws in California force construction to other states, for better or worse.

Here is a link that might be useful: Fantastic article about wood finishes, including catalyzed lacquer

Comments (4)

  • 15 years ago
    last modified: 11 years ago

    Interesting information. Thanks. I actually prefer a finish that isn't so shiny and "plasticky" feeling. I want my cabinets to be more like my vintage and antique furniture. Do you know what that is?

  • 15 years ago
    last modified: 11 years ago

    Hi ncamy - that's exactly my next question to myself, too. I'll report back what I figure out. Like you I (think I) prefer things not to have that thick, deep translucent shiny plasticy look. Come to think of it I bet that's "lacquer" as opposed to "varnish". But I'll let you know the next great chapter! Another of my questions is the role of "glaze".

    Will the questions never end?

  • 15 years ago
    last modified: 11 years ago

    I think of varnish as being a type of finish (and finish as a generic term to apply to any treatment of the wood) but I'm sure woodworking people can steer you right on that.

    On the California CARB question, though, there are two sets of rules guiding this: one is the rule about what you can emit while doing work like finishing, which is what prevents cabinetmakers and others from using traditional catalyzed finishes in state. Like that link says, there are many CARB compliant finishes out there, though I'm not sure anyone can say with certainty how they will perform side by side in the long run, since most are relatively new.

    The second set of rules governs what cabinetry (and other woods) can emit themselves after they're finished, and that affects cabinets made *or* sold in California. A higher tier of rules just kicked in last month so I don't know if it knocked any players out of the marketplace, but in general the big companies have been watching this carefully. As of last year at the lower level of regulation, you could get most/all national lines here.

    Interestingly, some of the small shops we talked to were willing to bend these rules on the paint front (and paint with oil-based, which is not allowed for residential use). The guy we ended up with was adamant about not doing this as he could potentially lose his license for it, and that seemed very reasonable. So we used low VOC paint, and I do have to say that I really love that it doesn't smell at all, in contrast to the oil-based, which the PO used on our old cabinetry. Very resilient/easy to clean, but still stinky months later. So there are upsides to being CARB-compliant. ;)

    HTH!

  • 15 years ago
    last modified: 11 years ago

    Oh indeed I agree about the upside to CARB-compliance and the existence of these rules! My husband may grouse but for my part, I'd really very much rather these things be regulated to save me from my baser self. It's really hard to vote against your pocket-book in favor of intangible things like 'the environment' (even when as long-term committed as I), and generic, population-based observations not necessarily relevant to personal experience 'health' issues. (That is, just because VOCs are bad, statistically, for a population of people on average, doesn't mean your own personal self will be negatively affected -- I happen to think probably you *may* be, but that's not the point).

    So I'm very attuned to all this confusing subtlety and nuance about where all this stuff is manufactured and why and why it is more or less durable and whether it's worth it and the tradeoffs, etc. I think it could well be that in the endless drive for better quality exclusively, we forget to incorporate other issues in these decisions like, say, the environment. Thus we appreciate the lower cost of cabinets made in Mexico but it's hard to factor in the costs of why it's cheaper.

    Etc.

    These are all very, very tricky kinds of decisions! Frankly, though I know many on this forum (or perhaps more so over in appliances) don't agree, I think asking our government to do some of the heavy-lifting in terms of these decisions for us is a good thing. Unfortunately as you point out, half these regulations are just side-stepped by crafting the stuff 'from away'.

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