Tetenal Ultrafin liquid is a versatile black and white film developer. This one-shot developer has an excellent speed yield. Ultrafin liquid is highly compensating and fine grain. Anyone who needs a more exceptional fine grain should get themselves some Tetenal Ultrafin T-Plus. Dilution: 1 + 10 to 1 + 30, depending on the desired negative contrast. Yield: 250 ml concentrate = approx. 20 films, 1000 ml