The photographs in Líquidas e Sólidas were taken over the course of 25 years. The first were captured with a Polaroid Image camera, which was quite popular in the 1990s. These photos are physically soft because that Polaroid ejected "liquid" images that required a few minutes to harden. In contrast, the more recent ones were taken with a new Fuji Instax, which produces firmer, less malleable photos.
These various states of the instant cameras' photographic emulsion—liquid, solid, or pasty—are evident in the results, with each revealing itself to be more (or less) malleable, resisting or yielding to physical manipulation of the paper. This uncertain condition of liquidity or solidity was applied to the essay's two main themes: architecture and the nature of cities. Here, vegetation and urban voids appear more solid and permanent, while architecture melts into ephemeral, liquid landscapes.
