The same photographer has two other photographs[^1] which previously were ranked highly in the contest. All seem to focus on chemical reactions and are stunning.

Interestingly, the previous two—of a candle and match—used 2.5x magnification, where as this one required 20x magnification, which just goes to show as to how tiny the printer mechanics really are.

[^1]: https://nikonsmallworld.com/people/ole-bielfeldt