Coating Solution Identification

We have two coating solutions A and B.solvent used was water.How we can find out that which one is film coating solution and which one is entric coating solution without knowing the formulation?

Take 200 ml of solution from each formulation in 2 glass beakers.Add 50 ml of organic solvent eg IPA in both solutions.
Web like mass will be formed in solution on addition of IPA contaning enteric polymer and other will remain unaffected.

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Why web like mass will be formed?