Acetylation
If you search online, there are academic journals and online articles that can answer the question 'what is acetylation' in a very scientific way. But instead of spinning stories about hydroxyls, hydrogen atoms and other chemistry jargon, we can explain acetylation in the simplest terms (in the context of our wood) like this: Add vinegar to a softwood and it turns into a “hardwood,” and this prevents the cell walls in the wood from absorbing water.
Watch the video about the secret of Acetylation!