Patent ID: 7079304

Claim:
A structured fluid compositio1n comprising: (a) a low refractive index liquid; (b) particles selected from the group consisting of light absorbing particles, and non-light absorbing or very low light absorbing particles; wherein said non-light absorbing or very low light absorbing particles absorbing particles help to create a structured colloidal suspension, and wherein the particles interact through colloidal forces without encapsulating the fluid in isolated compartments; and (c) at least one additive selected from the group consisting of (i) a dispersant, (ii) a charging agent, (iii) a surfactant, (iv) a flocculating agent, (v) a polymer, and (vi) combinations thereof; wherein the particles have a sufficient number of functional groups of either acid or base, to allow the dispersant to form a tightly packed mono-layer, and wherein the dispersant has the complementary acid or basic functional group to interact with the particles surface and a molecular structure resulting in a strong interaction between the particles surface and the dispersant to inhibit agglomeration, resulting in a stable suspension that is not agglomerated having ionically charged light absorbing particles, and forming an interactive structure which inhibits motion therein.