Hierarchy classification:

1. top of the aat hierarchies
2. Materials Facet
3. Materials (hierarchy name)
4. materials (substances)
5. [materials by form]
6. [materials by physical form]
7. colloid (particulate material)
8. gel

Anotations

Scope note:

Gelatinous, water-soluble polysaccharide substance used as an inexpensive substitute for agar in bacteriological media. In conservation, used in cleaning interventions on works of art on paper. Applications of rigid gelan gum allows a constant and controlled release of water onto paper.