Differing types of desiccant dehumidifiers get the job done in alternative ways, but the main method they use to extract humidity from your air is possibly absorption or adsorption. Absorption occurs when the desiccant substance dissolves as it takes humidity from your air, as is the case with dampness absorbers. https://dstdehumidifiers.co.uk/case-studies/desiccant-dehumidifiers-in-cold-stores/