Film Cameras can be accidentally creative by that said, by mistake this photography technique have been discovered not sure by who i searched for this piece of information but no one can confirm who cares anyway :Pp
so how to do it well, let me give some history first :)
i tried it on my first film roll and since i was using 400 ISO film all my double exposure shoot got over exposed, stupid me as i said on my last post i was using 100 ISO setting on a 400 ISO film, don't judge me -_-
and even though if i was using the right film with the right setting i would get it over exposed too / maybe, but i was using the same exposure setting so i guess i would,
so i got cross this discussion well it had expand my knowledge a lil bit, so once again i jumped on the web and use my searching skills and got a better understanding of the subject.
the following have been quoted from here >> Link <<
start of quote "
In film and photography, double exposure is a technique in which a piece of film is exposed twice, to two different images. The resulting photographic image shows the second image superimposed over the first. The technique can be used to create ghostly images or to add people and objects to a scene that were not originally there. It is frequently used in photographic hoaxes. It also is sometimes used as an artistic visual effect, especially when filming singers or musicians.
It is considered easiest to have a manual winding camera for double exposures. On automatic winding cameras, as soon as a picture is taken the film is typically wound to the next frame. Some more advanced automatic winding cameras have the option for multiple exposures but it must be set before making each exposure. Manual winding cameras with a multiple exposure feature can be set to double-expose after making the first exposure.
Since shooting multiple exposures will expose the same frame multiple times, negative exposure compensation must first be set to avoid overexposure. For example, to expose the frame twice with correct exposure, a −1 EV compensation have to be done, and −2 EV for exposing four times. This may not be necessary when photographing a lit subject in two (or more) different positions against a perfectly dark background, as the background area will be essentially unexposed.
Medium to low light is ideal for double exposures. A tripod may not be necessary if combining different scenes in one shot. In some conditions, for example, recording the whole progress of a lunar eclipse in multiple exposures, a stable tripod is essential.
More than two exposures can be combined, with care not to overexpose the film.
Digital photographs can be superimposed by using a software photo editor such as Adobe Photoshop or GIMP, by altering the opacity of the two images and line them up over each other, or set the layers to multiply mode, which 'adds' the colors together rather than making the colors of either image pale and translucent.
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so i hope this helped you keep up for more search result :)