How to make multiple exposures with a SX-70

Can anybody teach me this technique without involving a dark room?

thanks in advance

I don't know that it is possible in-camera... the late model Polaroid cameras were all automated. It's possible with the pack-film cameras but I've never heard of it being done with SX-70... I could be wrong though.

The SX-70 throws the picture out immediately after the exposure. Double exposures can

only be done using a darkroom/enlarger.

I did in-camera doubles with the Spectra, which throws out the picture after releasing the

shutter button. When you hold down the button and close the camera then a second

exposure can be done after reopening it.<div></div>