Reticulation takes place when you subject the film to very hot temperatures at the end of normal processing followed immediately by an ice cold stop bath. You then fix the film normally. I found it best to boil a kettle of water then wait about 2 minutes or so for it to cool down slightly (so as to not damage the plastic film developing tank). Empty the film developer out of the tank then replace this straightaway with the hot water. Give it 1-to-2 minutes and then pour away the hot water. Then take your jug of cold water (that as been in the fridge complete with ice cubes in it for a few hours) and pour this into the tank (again give it about 2 minutes and then pour away and fix the film as per normal.
This process is very hit and miss though. I also imagine that today's film emulsion are far stronger and will not allow you to do this. The film that I used was a cheap roll (not Ilford or Kodak).
The resulting photographic prints will have small dark dots or circles. You notice this when you have the film negatives in the enlarger and are using your focusing scope to focus in. You will see the reticulation effect if you click onto and enlarge the image.
Kingston upon Hull, North Humberside, England.
From a City & Guilds 9231 Certificate in Photography for the Image Derivation module, circa 1993.
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