2. Origins and main types of polymers
To develop a gelled texture, the formulator can use endogenous gelling agents (for example, pectin from fruit cell walls when making gelled jam) or may need to add gelling additives. A range of different agents, most of them polymeric but also particulate, are available to formulators (table
2
). Their use and relative physicochemistry are discussed in paragraphs
3
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Origins and main types of polymers