Dear Shruthi,

thanks for sharing this interesting technical problem with the RG community. Casting of PMMA fims using a solution in chloroform as a well-established method. My suggestion would be to make sure that your glass casting dishes are thoroughly cleaned and grease-free. A good cleaning procedure would be to soak them in ethanolic KOH solution (careful!, wear safety glasses!), rinse with dilute HCl and distilled water and then dry them in a oven at 120 °C. It might also be worth watching the "PMMA Thin Films Tutorial" on YouTube.

Good luck with your experiments!

thank you sir.

I tried with keeping it in 4 degree { In refrigerator). And then heated at 4o degree to evaporate water I got very nice film.