Ilford’s PQ borax formula for films and plates. Gives grain fine enough for all normal requirements without loss of emulsion speed.

IngredientQuantity
Mix ingredients in order.
Sodium sulphite anhydrous85grams
Hydroquinone5grams
Borax7grams
Boric acid2grams
Phenidone0.13grams
Potassium bromide1gram
Water to make
1
liter

Do not dilute. Develop for 8 minutes. When needed use Ilford ID68R as replenisher.