To Prepare processing solutions for processing of a film.
For preparation of solutions for processing a film you can buy complete sets of chemical components or complete sets of concentrates of solutions of these chemical components or to prepare solutions from separate chemical components.
For preparation of solutions for processing a film from complete sets of chemical components or complete sets of concentrates of solutions of these chemical components You should study the instruction of the user and execute all recommendations of the instruction in exact conformity.
For preparation of solutions for processing a film from separate chemical components You should carry out the general requirements on preparation of chemical solutions..
General requirements on preparation of chemical solutions
The basic components of solutions for processing a film are the solutions of chemical components in water.
For preparation of developers it is necessary to use distilled water. For preparation of minor solutions use boiled or water water of a high degree of clearing is possible. For preparation of fixing solutions it is possible to use usual water water.
For preparation of solutions it is necessary to use only chemical components of a high degree of clearing and with the not expired warranty period of a storage.
The solutions for processing of a film are complex, multicomponent systems, which properties substantially depend on structure of a solution, degree of clearing of chemical components, concentration of chemical components but also from the order of drawing up. The order of drawing up of chemical solutions is very important, as some substances are badly dissolved in solutions of other substances.
For preparation of solutions under the recipes the exact weighing of chemical components is necessary. The limiting deviation of weight at weighing should not exceed 5 % for developers and other basic solutions and %10 for fixing and minor solutions.
Each chemical component is necessary for weighing on a separate sheet of a pure paper.
For preparation of a solution, in the beginning, take 1\2 or 3\4 from volume of a solution.
For acceleration of dissolution of chemical components water warm up up to temperature 30-50 From degrees, a solution intensively mix. At more heat of water substance can be decomposed or oxidize quickly.
Usually, in the recipes of solutions the chemical components are listed in the same sequence, of which they should be dissolved.
Each subsequent substance can be entered into a solution only after complete dissolution previous.
For acceleration of dissolution the substance is necessary for entering by fine portions. Small clots the substance is necessary for sharing by a glass stick.
As Metol is badly dissolved in a solution sodium sulfite it dissolve in pure water. But at high temperature (50 ? and more) water Metol oxidize is fast. Therefore, before dissolution Metol input it is necessary to dissolve 1\10.... 1\20 the part sodium sulfite, that practically will not have an effect on Metol speed of dissolution.
After dissolution of all substances in a vessel add cold water up to given volume of a solution.
To weigh portions of chemical components.
To pour initial volume of water for preparation of a solution
To heat up water to temperature of 30-50 ? degrees ..
To measure temperature of water.
To dissolve chemical components agrees of the recipe and rules of preparation of chemical solutions.
To add cold water up to a necessary level of a solution.
To defend a solution within 12-24 hours and to filter.
The solution ready for using.
Check and installation pharmaceutical scales.
