F. and S. Marriott 140 Newbegin, Hornsea, England, HU18 1PB

February 2010. Stephanie is seriously ill. Therefore, there may be considerable delay in responding to e-mails. We will try to continue to despatch orders promptly. The shop is open by appointment only. Thank-you for your continuing patience.

Morse G-3 Developing Tank Instructions



Bottom of page

Morse G-3 Developing Tank


The Morse G-3 developer is a manually operated rewind processing tank for Double-8, 16 and 35 mm. motion picture film. The G-3 requires a minumum of 32 ounces of solution for processing double 8 or 16 mm. For 35 mm. 64 ounces of solution is required. Film may be processed complete through reversal to a positive image, ready for projection, or. to a negative image from which positive copies can be made.

Being an inexpensive mechanical device, the G-3 must be hand turned. At the rate of two turns per second, a 100 foot roll of film will pass from one reel to the other in about one minute. This is not critical, however, and the important feature to be remembered in turning cranks is to prevent excessive clinching of the film at the end of each pass.


Diagram - loading Morse tank

1. Window (for re-exposure) should face operator. Remove tank cover and reels.

2. Adjust top plate on both reels to the proper width of film to be processed, either 16 mm. or 35 mm. (double 8 is the same as 16 mm.)

3. Load light-sensitive films in total darkness. Slower films may be loaded in safe-light. Place film spool on the right hand spindle so that it will unwind counter-clockwise. Place empty reel on left spindle.

4. In sert the end of the film in the left-hand reel and clamp. To insure straight winding, give the reel two turns clockwise, loosen clamp and re-clamp. Make sure the end is securely clamped, however, before continuing. Unwinding the film spool is the only time that the two spindles revolve in opposite directions. The loading is performed in this manner so that the film will be wound emulsion side out. (see figure 1)

5. Place cover in position and wind the left hand crank clockwise until all the film is off the spool.

6. If using safe-light, continue in total darkness from this point. Remove cover and the empty film spool. Replace right-hand reel and insert loose film end in reel and clamp.

Diagram - developing with Morse tank

7. Pass film over idler roll and give right-hand reel two full turns. Loosen clamp and retighten to assure in-line positioning of film. (see figure 2)

8. Replace the tank cover. Make certain cover snaps are in place and that re-exposure window is to front and window cover closed.

9. With tank cover in place, re-exposure window cover closed and facing operator, remaining operations may be carried out in bright light.

10. Solutions are poured into the tank through the opening on the top of tank cover. They are emptied by pulling out rubber stopper, located in bottom of tank beneath window cover. Both inlet and outlet are light proof. Wind crank in the direction indicated on tank cover, each crank has direction indicated by arrow beneath it.


[The remainder of the instructions are specific to film emulsions and chemical formulae which are now out of date. I have therfore omitted them]

Top of Page

Photographic Pages



Book Reviews



Instruction Books




Spares and Repairs

We Buy

Other Pages

Model Railway Catalogue

Book Catalogue

Stamp Catalogue

Useful Pages

What's New? - with details of recent updates to the Marriott site

Site Contents

How to Contact Us


Web www.marriottworld.com

http://www.marriottworld.com/instruct3/morse_tank/with_pictures.htm (C) F. and S. Marriott