Table 1: Preparation of layered films.

Film1st step2nd step3rd step4th step

0.5-Ibu-1NaCMC → Sanatyl → pre-drying1% Ibu sol. → evaporationNaCMCpre-drying and drying
0.5-Ibu-2NaCMC → Sanatyl → pre-dryingNaCMC with Ibupre-drying and drying
1.0-Ibu-1NaCMC → Sanatyl → pre-drying2% Ibu sol. → evaporationNaCMCpre-drying and drying
1.0-Ibu-2NaCMC → Sanatyl → pre-dryingNaCMC with Ibupre-drying and drying

1-blankNaCMC → Sanatyl → pre-dryingacetone → evaporationNaCMCpre-drying and drying
2-blankNaCMC → Sanatyl → pre-dryingNaCMCpre-drying and drying
3-blankNaCMC → pre-dryingacetone → evaporationNaCMCpre-drying and drying
4-blankNaCMC → pre-dryingNaCMCpre-drying and drying

0.5-Ibu-1 without SanatylNaCMC → pre-drying1% Ibu sol. → evaporationNaCMCpre-drying and drying
0.5-Ibu-2 without SanatylNaCMC → pre-dryingNaCMC with Ibupre-drying and drying