There are two methods to prepare working solutions.

You can prepare replenisher first and then convert it into working solution. Left over can pour into replenishing tank. This method is easier for left over management.

An alterative method is to prepare working solution directly. This method is suitable for left over storage.

You must know your working tank size before proceeding. You can find out these data through the operator's manual. You can also calculate them by measurement. The worst case and is the most accurate way, is by pouring known volume of liquid into working tank.

Developers need accurate measurement. Bleach, fix, and stabilizer do not demand precision.

Preparation methods:

Film developer:
For all process- for every litre of working solution; use 860 ml of prepared replenisher and 30 ml of starter.

Example: If you have a working tank size of 10 litres; you need 8.6 litres of prepared replenisher, 300ml of starter, balance is 1.1 litre of water.

Alternative method: For every litre of working solution, use

For example: 10 litre working tank requires 430ml of part A, 50 ml of part B, 50 ml of part C, and 300ml of starter. Balance is 9.17 litres of water.

Film bleach:
For all process - use prepared replenisher as is. Add 20 ml  /litre of starter. For example: 10 litres working tank requires 200ml of starter.

Film fixer:
Process C41 - dilute with 20% water on prepared replenisher. For example: 10 litres working tank requires only 10/1.2=8.33 litres of prepared replenisher.

Process C41RA - use replenisher as is.

Fuji 23 - Mix 70% of prepared film fixer with 30% prepared bleach. For example: 10 litres working tank requires 7 litres of fixer replenisher and 3 litres of bleach replenisher.

Film stabilizer:
For all process: use prepared replenisher as is. No accuracy is required.

Paper developer:
Process RA4 Ultra white series: On preparing replenisher for using on working solution, remember use only 50% of part A. We have given you extra part A for better anti-oxidation protection. Using too much part A can cause greenish colour. This problem will disappear when chemistry is seasoned. Left over part A can be used to protect your chemistry from turning bad after 6 weeks. We recommend you to use alternative method if you do not understand first method.

For every litre of working solution, use 700ml of prepared replenisher (with 50% dosage on part A), and 30 ml of starter. Balance is water. For example: 10 litres working tank requires 7 litres of prepared replenisher, 300 ml of starter, 2.7 litres of water.

Alternative method: For every litre of working solution, use

For example: 10 litre working tank requires 20ml of part A, 50 ml of part B, 350 ml of part C, and 300ml of starter. Balance is 9.28 litres of water.

Extended time series (for modified machines): On preparing replenisher for using on working solution, remember use only 50% of part A. We have given you extra part A for better anti-oxidation protection. Using too much part A can cause greenish colour. This problem will disappear when chemistry is seasoned. Left over part A can be used to protect your chemistry from turning bad after 6 weeks. We recommend you to use alternative method if you do not understand first method.

For every litre of working solution, use 700ml of prepared replenisher (with 50% dosage on part A), and 30 ml of starter. Balance is water. For example: 10 litres working tank requires 7 litres of prepared replenisher, 300 ml of starter, 2.7 litres of water.

Alternative method: For every litre of working solution, use

For example: 10 litre working tank requires 20ml of part A, 40 ml of part B, 350 ml of part C, and 300ml of starter. Balance is 9.29 litres of water.

Note: for modified machines, if you can reduce operating temperature, and you have a developing time longer than 45 seconds, use higher dosage on part B. For Fuji machines, because you cannot reduce temperature, use lower dosage. Part B is developing agent. Higher part B concentration will have stronger activity. See theory section all more details.

Paper bleach / fix:
Use prepared replenisher as is.

Paper stabilizer:
Use prepared replenisher as is. No accuracy is required.

Mixing instruction for all replenisher or working solution:

Use roughly 60% of lukewarm water initially, add first part and stir well, then add second part and stir again. Continue on all parts and fill water to specified volume.

Warning: Do not mix concentrate chemicals together! Hazardous chemical reaction can evolve by mistake! In case of accident, flush with plenty of water. Do not panic. Photographic chemistry is safe.