Printing fluid mixing

A method for printing fluid dispersion, the method comprising:

• moving printing fluid to a printing fluid tank via a first chamber and a second chamber based on a printing fluid density level in the printing fluid tank, the second chamber in fluidic communication with the first chamber and the printing fluid tank;
• dissolving in the first chamber solids with printing fluid to obtain a concentrated printing fluid based on the printing fluid density level;
• mixing the concentrated printing fluid in the first chamber;
• and
• mixing the concentrated printing fluid in the second chamber.

A printing system comprising:

• a printing fluid tank;
• a mixing device comprising:
• a first chamber comprising a solid addition member to dissolve solids with printing fluid to obtain an enriched printing fluid and a first mixing member to reduce an average particle size of solids present in the first chamber,
• a second chamber to receive the enriched printing fluid from the first chamber, the second chamber comprising a second mixing member to reduce the average particle size of solids present in the second chamber, and
• a pump to supply the first chamber with printing fluid and to move enriched printing fluid towards the printing fluid tank via the second chamber;
• and
• a controller to control the solid addition member and the pump based on a printing fluid density level in the printing fluid tank.