Product Information

SIL-O-WET 651-PA is a fine particle size, very bright, leafing aluminum pigment treated with a chemical inhibitor to reduce its tendency to react with water. It is recommended for use in aqueous ink systems. This grade has a good combination of brightness and opacity, producing a strong metallic effect.

-Leafing

-Cornflake

SIL-O-WET grades are leafing and non-leafing aluminum pigment pastes carried in isopropyl alcohol in which the aluminum flakes have been chemically treated to reduce the aluminum-water reaction. These grades are recommended for use in aqueous flexographic and gravure ink formulations. The specific degree of gassing stability is formulation dependent and each formulation must be evaluated for acceptable stability. High or excessive shear during processing will reduce the effectiveness of the inhibitor and should be avoided.

The paste should be pre-soaked in co-solvent at a paste:solvent ratio of between 1:1 to 3:1. When formulating aqueous inks, the pH of the system should be kept as close to neutral as possible. Pre-soaking generally takes from one to eight hours. Finer grades typically take longer than coarser grades. Use low shear, slow speed mixing to achieve a smooth consistency free of agglomerates. High shear dispersion techniques should be avoided, as they will distort the aluminum flakes.

Aluminum pigment should be stored in the original shipping container and kept tightly sealed. Store containers in a cool, dry, well-ventilated, and properly rated area. Avoid any conditions that will suspend or float the particles in the air, creating a dust cloud. Avoid all possible sources of ignition. For additional information, please refer to the Safety Data Sheet (SDS) for this product, available from Silberline upon request. An SDS is supplied with all samples of this grade.

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