The process is undertaken at low pH in the presence of a surface-active molecule, with the hydrolysis step being completed with the formation of a microemulsion before adding sodium fluoride to start the condensation process.
The process is undertaken at low pH in the presence of a surface-active molecule, with the hydrolysis step. This hydrolysis step is being completed with the formation of a microemulsion before. This hydrolysis step were adding sodium fluoride. This was to start the condensation process.