The present invention relates to a susceptor combination comprising: metallic particles; particles of at least two or more semiconductor materials; and one or more alkaline or alkaline earth metal salts; to a susceptor ink composition containing it. It also relates to a laminate comprising a dielectric substrate and the susceptor ink composition printed on the substrate, as well as a microwaveable package comprising the laminate.

A method for preparing a nano metal paste, including the following steps. (S1) An organic metallic salt and an organic reducing agent are added into water or an organic solvent to obtain a first mixture. (S2) The first mixture is reacted under heating to obtain a second mixture containing metal nanoparticles. (S3) The second mixture is concentrated to obtain a nano metal paste containing 20-95% by weight of the metal nanoparticles. A conductive paste and A conductive ink prepared by using the nano metal paste as filler are also provided.

A composition including a first color shifting pigment flake population having a first D50 particle size; and a second color shifting pigment flake population having a second D50 particle size that is different from the first D50 particle size, wherein the first color shifting pigment flake population and the second color shifting pigment flake population have a similar face color and color shift is disclosed. An article including the composition is included. A method of making the composition and a method of making the article are also disclosed.

An aqueous coloring composition contains a metal pigment and water. The metal pigment is metal particles having a surface treated with at least one surface treatment agent, and the surface treatment agent is at least one compound represented by general formula (1) (A.sup.1-R.sup.1)P(Q)(OH).sub.2 or (2) (A.sup.2-R.sup.2O).sub.aP(O)(OH).sub.3-a. The volume-average particle diameter D50 of the metal pigment is 9 m or less.

A water-based coloring composition contains a metal pigment, water, and an organic solvent. The metal pigment is surface-treated with a first surface treatment agent and a second surface treatment agent, the first surface treatment agent contains a phosphonic-acid-based compound denoted by Formula (1) or a phosphoric-acid-based compound denoted by Formula (2), the second surface treatment agent contains a phosphonic-acid-based compound denoted by Formula (3) or a phosphoric-acid-based compound denoted by Formula (4), and the carbon number of R.sup.1 or R.sup.2 of the first surface treatment agent is higher than the carbon number of R.sup.3 or R.sup.4 of the second surface treatment agent.