Question

list item of safe light test and describe how to perform test? state important of test and include columned maintenance schedule?

Answer 1

Safe light test is always performed with an exposed film, it is exposed film that is vulnerable when it is being placed on the processor feed tray . A film in a cassette is exposed to 50kV , 3 mAs on the table top . The cassette is then taken to the darkroom and placed on the counter.

A special light to illuminate a darkroom, it does not affect the X- ray film.

Darkroom light

A special light source , designed to emit specific wavelength of light, while provide sufficient illumination for darkroom workers but does not affect X - ray films or other kinds of radiographic films or other kinds of radiographic films being loaded , stored or developed . The light or light bulb usually emits a red light and is sometimes known as a safelight or darkroom light.

Specification

Lamp size: height 201mm, width315mm, depth 167mm

- power:- 220-230V, 8W- 9W ,0.05A

-Lamp frame:- white- or black- coloured plastic or metal materials.

- Plexiglas coloured panels with a light filteron the front.

- Bulb:- 8-9W , white , standard screw - in system or tube.

- Electric cablr 2m

- Fixture components

The lamp emits a dark red colour that can be used to develop green or blue films. The lamp's recommended minimum distance from the film treatment areas is about 1.2 m.

NOTE

Red - coloured bulb :

Red- coloured bulbs or tubes are not recommended in a dark room, irregular voltage and heating action on the bulb or tube can cause micro - cracks in the outer - colour coating which can emit white light that is not visible to human eyes , but nevertheless will jeopardize X - ray film development.