Flocculant
A flocculant is a chemical substance that, when added to a ceramic suspension, modifies the interactions between particles, favoring their union in aggregates or flocs. These agents are usually inorganic salts (such as calcium chloride) or organic acids (such as acetic acid present in vinegar), and act by altering the surface electrical charges of the particles, promoting their mutual attraction.
The use of flocculants is especially valuable in the preparation and maintenance of engobes, slip and glazes, as they help to prevent the sedimentation of solids during storage. Also, in the application of these coatings on the ceramic surface, a higher viscosity can improve adhesion, allowing more uniform layers. In slip casting, control of flocculation by flocculants makes it possible to adjust the forming time of the parts, since a more viscous slip tends to deposit more quickly on the mold walls.Interesting Fact
Some flocculants, such as calcium chloride, are widely used not only in ceramics, but also in other fields such as water purification, where they help remove impurities by binding particles.Helpful Tip
Before using a new flocculant or changing the concentration, test small quantities, noting changes in viscosity and consistency. This way you can anticipate the results on a larger scale, optimizing the process without risking excess material.
