This formula is closely related to Geoffrey Crawley`s FX-9 and FX-10 developers and is published in a book called RAYCO REVEALS.
Sodium Sulphite, anhydrous = 100 grams
Hydroquinone = 6 grams
CD-4 = 8 grams
Borax = 4 grams
Boric acid = 3...

Rayco Ultra Fine-Grain B&W Negative Developer.
Rayco Ultra Fine-Grain B&W Negative Developer.