Sumyumgai

The final product is an oil that easily traps the solvent in pockets. It must be vacuumed out completely. Sorry if I did not make that clear.

Once I vacuum out the solvent I'll be left we a rigid film at the bottom of the flask. How can I collect this? Normally the solution is vacuumed in a chamber where the material is more accessible and can be scraped out with a razor blade. Chambers can be costly. Any ideas or has anyone ever seen a little scraping tool that would fit in the flask? Thank you!!!