Safelights (5)

Question 1

Two types of safelights:

Answer 1

1. low wattage bulbs or fluorescent tubes with a red coloured filter.
2. LED’s or fluorescent tubes with a direct filter coating.

Question 2

Prolonged exposure of unprocessed, exposed or unexposed films will cause a _____ effect.

Answer 2

fogging effect.

The time it takes to fog is dependant on the filtration quality of the safelight.

Question 3

What are Safelights?

Answer 3

Red lights in the darkroom that prevent exposure from white light sources

Question 4

How to perform a safelight check

Answer 4

1. under dark conditions, place lead characters on the film, each one one-third of the film length
2. Place an opaque covering two-thirds of the film, under a safelight for 15 minutes
3. move opaque to cover additional third, leave under light for 15 minutes more
4. move off the opaque to cover rest of film under light for 15 more minutes
5. process film and evaluate.

Question 5

How to tell if a safelight is to excessive/inadequate?

Answer 5

transparent base of the film would have a measurable density that what would normally be measured.