In this operation, molds are submerged in a tank containing electrolytes such as those formed when calcium nitrate is diluted in water. This water based coagulant adheres to the surface of the mold when dried. When latex comes in contact with the mold it destabilizes forming a latex film around it. In addition, to electrolytes, the coagulant may contain surfactants, mositurizers and de-molding agents.
After the coagulant has formed a film, the molds are introduced in the latex tank. This latex has been chemically conditioned to be able to form a balloon in a process called prevulcanization.
Latex dries sufficiently to render it strong enough for high spreed cylindrical brushes to form a bead on the balloon.
Once the bead has formed, the mold enters the drying oven where the latex finishes curing and drying.
In this operation, the balloons is stripped from the mold.
In the packaging station, balloons are packaged in bags of a particular count. Using precise wieghting and measuring equipmentensures the declared amount has been packaged.
The printing machine inflates the balloon and prints on it advertising messages, images or logos using serigraphy (silk-screen printing) or flexography printing techniques.