Traditional animation is also called cel animation.In this process, each frame of the film would be drawn by hand. Pictures of the characters and objects would be drawn one after the other with only slight changes in their position.
The images are drawn on a transparent sheet of paper called cel, one frame at a time. The paper must be fitted on a keg with the help of a colored pencil. Once the drawings are done, each individual frame would be photographed or scanned into the computer. Music, voice-overs, etc. are added before projecting it.
One of the biggest disadvantages of this method is that it is lengthy and labor-intensive. It is also expensive to produce and hence only large companies can afford to produce traditionally animated films.