A common formulation is the 4-4-50 mixture, meaning 4 lbs of copper sulfate and 4 lbs of lime in 50 gallons of water.
The mixture is traditionally prepared by dissolving copper sulfate in water and adding a suspension of lime. Mixing copper sulfate ( ) and lime ( bordeaux mixture
Pulverized copper sulfate and hydrated lime are added directly to a filling spray tank while the agitator is running to ensure even mixing. A common formulation is the 4-4-50 mixture, meaning
The final solution must be neutral or slightly alkaline ( bordeaux mixture
) results in a gelatinous, sky-blue suspension of copper hydroxide and calcium sulfate.