What You Need to Know
Sequential ionic gelation forms concentric membranes: an outer alginate-calcium matrix and inner reverse-spherification layer. The process leverages diffusion-limited crosslinking of sodium alginate (C6H7NaO6)n with divalent cations.
Enables creation of durable liquid-filled spheres that withstand plating and temperature variations better than single-layer spherification.
Key Parameters
Temperature
22°C
4°C - 60°C
Time
3min
30s - 10min
Equipment
Precision scales (0.01g resolution)pH meterImmersion circulatorPeristaltic pumpSilicon molds
Steps
- 1.
Liquid olive (El Bulli): Maintains olive oil core through service
- 2.
Caviar replacements (Modernist cuisine): Prevents premature bursting in mouth
The Science
Primary Reaction
Ionotropic gelation