Abstract: A method and apparatus for calculating a composition for a preparation for treating hair fibers. The method comprises: obtaining (330) a target specification, wherein the target specification comprises one or more numerical parameters defining a desired appearance of the hair fibers; providing (340) a first computational model that relates a composition of a preparation to a predicted appearance of the hair fibers when treated by that preparation; and calculating (350), using the first computational model and the target specification, a composition for the preparation that is predicted to produce, if the hair fibers are treated with the preparation, an appearance similar or identical to the desired appearance.

Abstract: Absorbing articles comprises water absorbing resin including a water-soluble unsaturated monomer, having a dissociable group, as a main component in a repeating unit of a main chain and an internal cross-linked structure, in which a cross-linked structure index represented by the formula [Cross-linked structure index=(Equilibrium swelling capacity with respect to 0.9% by weight of brine)1/3/(Weight average molecular weight after hydrolysis treatment)×1,000,000] is 14 or more, a weight average molecular weight after hydrolysis treatment is 220,000 or less, and a molecular weight distribution after hydrolysis treatment is 3.40 or less, and a method for producing the same.

Abstract: A method and apparatus for calculating a composition for a preparation for treating hair fibers. The method comprises: obtaining (330) a target specification, wherein the target specification comprises one or more numerical parameters defining a desired appearance of the hair fibers; providing (340) a first computational model that relates a composition of a preparation to a predicted appearance of the hair fibers when treated by that preparation; and calculating (350), using the first computational model and the target specification, a composition for the preparation that is predicted to produce, if the hair fibers are treated with the preparation, an appearance similar or identical to the desired appearance.

Abstract: Absorbing articles comprises water absorbing resin including a water-soluble unsaturated monomer, having a dissociable group, as a main component in a repeating unit of a main chain and an internal cross-linked structure, in which a cross-linked structure index represented by the formula [Cross-linked structure index=(Equilibrium swelling capacity with respect to 0.9% by weight of brine)1/3/(Weight average molecular weight after hydrolysis treatment)×1,000,000] is 14 or more, a weight average molecular weight after hydrolysis treatment is 220,000 or less, and a molecular weight distribution after hydrolysis treatment is 3.40 or less, and a method for producing the same.