Abstract: A computer-implemented method for inverse simulation of a plurality of fibers. The method comprises: providing a computational model for describing mechanical behavior of fibers; obtaining target geometry information describing a target configuration or dynamical behavior of the plurality of fibers; and inverse simulating the behavior of the plurality of fibers, using the computational model and the target geometry information, to calculate a target set of fiber mechanical parameters for the plurality of fibers. Fibers with the calculated target set of fiber mechanical parameters exhibit the target configuration or dynamical behavior. In some embodiments, the inverse simulation comprises using analysis-by-synthesis to help derive the target set of fiber mechanical parameters. In some embodiments, the inverse simulation uses a neural network to infer information about fiber mechanical parameters from the target geometry information. The invention also provides a method of training the neural network.

Abstract: A method for colouring hair, wherein the method comprises: (i) the formation of a first plurality of coated hair fibre portions, wherein the coating comprises a first composition, wherein the first composition comprises a first hair colouring agent, a hydrophobic phase, a hydrophilic phase, a surfactant, and a thickener capable of interacting with the hydrophobic phase and the hydrophilic phase; and subsequently (ii) styling the hair wherein the first plurality of coated hair fibre portions is contacted with a second plurality of hair fibre portions; wherein the method does not comprise the application of a solid barrier means in order to separate the first plurality of coated hair fibre portions from the second plurality of hair fibre portions, and wherein the first composition is substantially free of persulfate.

Abstract: A computer-implemented method for simulating a plurality of fibers is disclosed. It may be applied in particular for simulating the mechanical behavior of a tress or head of hair, woven or nonwoven fabrics, brushes, or other products incorporating fibrous material. The method comprises: providing a computational model for describing mechanical behavior of fibers; obtaining a set of fiber mechanical parameters, associated with fibers of a predetermined type, for use with the computational model; obtaining geometry information, describing the shape and position of the plurality of fibers to be simulated; and simulating, using the computational model, the set of fiber mechanical parameters, and the geometry information, a change in configuration of the plurality of fibers, to produce a second geometry information.

Abstract: A computer-implemented method for inverse simulation of a plurality of fibers. The method comprises: providing a computational model for describing mechanical behavior of fibers; obtaining target geometry information describing a target configuration or dynamical behavior of the plurality of fibers; and inverse simulating the behavior of the plurality of fibers, using the computational model and the target geometry information, to calculate a target set of fiber mechanical parameters for the plurality of fibers. Fibers with the calculated target set of fiber mechanical parameters exhibit the target configuration or dynamical behavior. In some embodiments, the inverse simulation comprises using analysis-by-synthesis to help derive the target set of fiber mechanical parameters. In some embodiments, the inverse simulation uses a neural network to infer information about fiber mechanical parameters from the target geometry information. The invention also provides a method of training the neural network.

Abstract: The present invention relates to a device for testing the properties of fiber(s). The fibers may be human hair fibers, for example, a hair tress. The device has a plurality of rods that are capable of freely rotating. Each rod has a proximal end and a distal end. The proximal end is connected to a support. The distal end is free. The present invention also relates to related uses and methods of using the device.

Abstract: A computer-implemented method for simulating a plurality of fibers is disclosed. It may be applied in particular for simulating the mechanical behavior of a tress or head of hair, woven or nonwoven fabrics, brushes, or other products incorporating fibrous material. The method comprises: providing a computational model for describing mechanical behavior of fibers; obtaining a set of fiber mechanical parameters, associated with fibers of a predetermined type, for use with the computational model; obtaining geometry information, describing the shape and position of the plurality of fibers to be simulated; and simulating, using the computational model, the set of fiber mechanical parameters, and the geometry information, a change in configuration of the plurality of fibers, to produce a second geometry information.

Abstract: Apparatus and method for rendering an image of a fibrous material. The method includes providing parametric fibrous material optical properties derived from actual material fiber samples via the apparatus; providing a parametric virtual light environment; providing a virtual fibrous material array; and rendering an image of the virtual fibrous material array according to the interaction of the parametric fibrous material properties and the parametric virtual light environment.

Abstract: The present invention relates to a device for testing the properties of fibre(s). The fibres may be human hair fibres, for example, a hair tress. The device has a plurality of rods that are capable of freely rotating. Each rod has a proximal end and a distal end. The proximal end is connected to a support. The distal end is free. The present invention also relates to related uses and methods of using the device.

Abstract: Apparatus and method for rendering an image of a fibrous material. The method includes providing parametric fibrous material optical properties derived from actual material fiber samples via the apparatus; providing a parametric virtual light environment; providing a virtual fibrous material array; and rendering an image of the virtual fibrous material array according to the interaction of the parametric fibrous material properties and the parametric virtual light environment.

Abstract: A method for colouring hair, wherein the method comprises: (i) the formation of a first plurality of coated hair fibre portions, wherein the coating comprises a first composition, wherein the first composition comprises a first hair colouring agent, a hydrophobic phase, a hydrophilic phase, a surfactant, and a thickener capable of interacting with the hydrophobic phase and the hydrophilic phase; and subsequently (ii) styling the hair wherein the first plurality of coated hair fibre portions is contacted with a second plurality of hair fibre portions; wherein the method does not comprise the application of a solid barrier means in order to separate the first plurality of coated hair fibre portions from the second plurality of hair fibre portions, and wherein the first composition is substantially free of persulfate.

Abstract: The invention relates to agents for the protective, conditioning, detersive or cosmetic treatment of skin or hair that contain pyridinols or pyrimidinols or their mixtures.

Abstract: An apparatus (1) to remove one individual hair/fiber (2) at a time from a tuft (3) using a gripping device (4), which has a first and a second opposing gripping element (5, 6). The first and the second gripping elements (5, 6) are relatively moveable with respect to one another, wherein the first gripping element (5) has a wedge-shaped groove (7) oriented towards the second gripping element (6) and the second gripping element (6) has an essentially flat counterpressure zone (8), and wherein the first gripping element (5) is tapered on the side of the wedge-shaped groove (7) (taper A) (FIG. 2).