What's your technique? Holding them up to the light?

4 seconds sound clip from the White Christmas (1954) movie soundboard.

You can hear this line at 01:17:05 in the Blu-ray version of the movie.

Quote context

[...]

- See you Sunday night then. Bye.

- Take it upstairs, Susan.

- All right.

- Emma?

- Oh. Was there a telegram for me?

- What? Oh, yeah! Just an offer from the Carousel Club in New York, anytime you and Judy are available.

- What's your technique? Holding them up to the light?

- That's for amateurs. I use steam.

- You're quite a pro.

- I'm thinking of turning in my uniform.

- Stick your nose in other people's business and eventually you find out things you wish you hadn't.

[...]