OPERATING INSTRUCTIONS FOR FILM DUPLICATORS
Models 21520, 21522 and 21524
1. USE ONLY DUPLICATING FILM
2. Open latch and lift cover
3. This will permit the positioning of the duplicating film over the original x-rays to be
duplicated in the dark room.
4. Place the original x-rays to be duplicated on top of the plate. Then place the
duplicating film (emulsion must face down) on top of the original. Small notch must be
on UPPER RIGHT CORNER. NOTE: Original X-Ray and duplicating film MUST be in
DIRECT CONTACT with each other with NO air gap between them.
5. Close cover and latch. Turn the rocker switch to "On."
6. Turn timer dial to 10 seconds.
7. Average duplicating time is 10 seconds. This could vary by the density of the original
or the desired density of the duplicate.
8. Depress the time button (white button in the center of the timer), a red light on the
panel will indicate the start and stop of the exposure.
9. If density of the duplicate is too dark, INCREASE exposure time 5 seconds. If too
light, DECREASE exposure time 5 seconds (see NOTE below).
10. After duplication is complete, lift cover and remove duplicated film.
11. Place duplicating film in processing tank and develop in same manner as regular
x-ray film.
NOTE:
Duplicating film is a direct positive type with emulsion coated on one side of a polyester
base. Being a direct positive film, the relationship of exposure to image density is directly
opposite that of dental x-ray film. Therefore, if density of duplicate is too dark, increase
exposure time until desired result is reached. If density of duplicate is too light, decrease
exposure time until desired result is reached. Developing solution must be kept constantly
fresh. Failure to do so will result in poor duplications, i.e. lack of contrast, or grayish
background. Use manufacturer’s recommended developing instructions, such as Flow,
Kodak, F.R., G.E, etc.
CHECK YOUR DUPLICATOR BEFORE USING
1. Plug unit in a 110 volt outlet, and lift the cover
2. Turn black rocker switch to "On."
3. Set time to 10 seconds, depress timer button in the center of the timer and see if
indicator light and ultraviolet lamp are on. If not, remove white plate and see if lamp is
properly in sockets. (Avoid looking directly at the ultraviolet lamp.) Note: Timer dial
will NOT move during timer cycle.
TECHNICAL DATA
Model 21522
18.25"L x 6.25"H x 12"W
Power supply:
110 Volts 60 Cy
AC .25 Amps
Duplicates film up to
10" x 12"
Model 21520
18.25"L x 6.25"H x 8"W
Power supply:
110 Volts 60 Cy
AC .25 Amps
Duplicates film up to
6" x 12"
Model 21524
23.375"L x 9”H x 16.25"W
Power supply:
110 Volts 60 Cy
AC .25 Amps
Duplicates film up to
14" x 17"
Wolf X-Ray Corporation, 100 West Industry Court, Deer Park, NY 11729 631-242-9729 Fax: 631-242-1001