Differing types of desiccant dehumidifiers do the job in various ways, but the main approach they use to extract dampness through the air is both absorption or adsorption. Absorption occurs when the desiccant compound dissolves as it will require dampness in the air, as is the situation with dampness absorbers. https://dstdehumidifiers.co.uk/case-studies/desiccant-dehumidifiers-in-cold-stores/