The discussion focuses on the vapor pressure of Plexiglas (PMMA) at ambient temperature, with one user seeking specific values. A reference indicates that the vapor pressure for acrylic materials, including Plexiglas, is in the 10^-7 Torr range. Additional resources are shared, including a NASA link on outgassing and an IEEE paper. The conversation highlights the difficulty in finding precise data online. Overall, the vapor pressure of Plexiglas is confirmed to be very low, which is crucial for applications involving outgassing.