G Stuck film leader

There is very little space between the grooves of a film spiral. There is enough width to allow free movement of chemistry but if the tongue is not secured at the edges then it can easily come in contact with other sections of the film. With two surfaces in such close contact processing cannot occur. The result is a clear section of the film in the shape of the tongue. To stop this occurring always ensure that the tongue is cut away before loading the spiral (see Figure 48.7).

Fault prevention: Cut the leader from the film before winding it onto the developing spirals.

Figure 48.7 A film leader stuck to the surface of the roll stops the chemistry getting access to correctly develop the negative.
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