Formulary's 130 Paper Developer is a superb paper developer that produces a full scale of rich blacks. The developer has an excellent shelf life, high capacity and is very suitable for batch processing. The prints obtained with F130 are surpassed only by the Amidol Developers, however F130 is much more pleasant to work with. We feel F130 is one of the best developers ever formulated. The chemicals in Formulary 130 make stock solutions which are diluted 1:1 with water to make the working solution. The stock solution is stable up to 6 months. A capacity of about 50 8x10" prints can be expected per 1 liter of working solution.