Structure of film packet

Question 1

The film

Answer 1

Is sandwiched between 2 sheets of black paper to protect it from light

Question 2

Backed by

Answer 2

Lead foil to absorb stray radiation

Question 3

These layers

Answer 3

Are encased in a light + waterproof wrapping

Question 4

Both film + packet

Answer 4

Have a raised pimple on the side faving the tube - aids with orientating the film during exposure, mounting + viewing

Question 5

The film is dual sided

Answer 5

Both sides are the same and covered in an emulsion

Question 6

The emulsion consists of

Answer 6

Crystals of silver halide, usually silver bromide which is embedded into it

Question 7

Film speed

Answer 7

Is dependent upon the size + numbers of silver halide in the emulsion
The larger the crystals + greater the number, the faster the film
The faster the film, the lower dose of the radiation needed and greater safety for the pt

Question 8

Also

Answer 8

The film is a plastic base covered in an adhesive layer with the emulsion + then a protective layer on top