I am a postdoctoral fellow working under the supervision of Dr. X. I am contacting you in relation to the BS films that we will be sending to your laboratory. As I am sure you know, BS is a rather photolabile material. Hence, we would like to minimize the time between film preparation and measurement. If we prepare the films right now and we send them to you immediately afterwards, they will arrive at your laboratory next week. Would this be a good time for you? If you are busy with other projects, just let us know and we'll prepare the films whenever you are free. Thank you.