Abstract: There is provided a polarization film, a visible latent image article, and a manufacturing method thereof enabling a latent image using a birefringent property to be provided in a visualized state. A polarization film includes a polarization layer transmitting a specific linear polarization component, a circular polarization component, or an elliptical polarization component, and an adhesive layer, a tensile modulus of elasticity E of the polarization film is 0.01 GPa to 7.8 GPa, and a thickness h of the polarization film is 60 ?m to 300 ?m, and in a visible latent image article which includes the polarization film and the article having a birefringent pattern, the polarization film is peelably affixed to the article having a birefringent pattern through the adhesive layer, and thus a latent image due to the birefringent pattern is visible by the polarization film.

Abstract: The present invention provides a method for producing a laminate film comprising forming a layer by curing a liquid crystalline composition containing a liquid crystalline compound that has a polymerizable group and is solid at 25° C. and forming, on the layer, a polymer layer from a composition containing a polymer, the liquid crystalline compound migrating into the polymer layer after forming the polymer layer until the compound becomes 0.1% by mass to 30% by mass relative to the solid content mass of the polymer layer, wherein the method includes selecting the liquid crystalline compound and the polymer from combinations having a heat of crystallization of a mixture obtained by mixing the two at a mass ratio of 9:10, of 0.75 J/g or less. White cloudiness along with crystallization of the liquid crystalline compound is not generated easily in the method of the present invention.

Abstract: A product comprising a patterned optically anisotropic layer having two or more regions of different birefringence in the form of a pattern, which further comprises a semi-transmissive-half-reflective layer having a transmittance of 30% or higher and a reflectance of 30% or higher is provided. The product permits visualization of a latent image in the product through a polarizing plate as well as visualization of the information on the side opposite to the side to be viewed from.

Abstract: A transparent product that gives an image only at one side, which can be used for an advertisement on the window or the like, which is a product that has a semi-transmissive-half-reflective layer having transmittance of 30% or higher and a reflectance of 30% or higher, a birefringent layer which is a patterned optically anisotropic layer having two or more regions of different birefringence in the form of a pattern or a driven-type optically anisotropic layer containing a liquid-crystal compound driven by voltage application to control the optical anisotropy, and a polarizing layer in this order and does not have, at the opposite side of the polarizing layer with respect to the birefringent layer, a polarizing layer, is provided.

Abstract: A product comprising a patterned optically anisotropic layer having two or more regions of different birefringence in the form of a pattern, comprising at least an intensity gradation-type pixel of approximately uniform birefringence and an area gradation-type pixel comprising two or more of drawing units of different birefringence, and each region of a single birefringence in the patterned optically anisotropic layer comprising a plurality of the drawing units is provided. The product permits the formation of full-color images (latent images) and includes delicate color representation, such as the densities of particular colors.

Abstract: A transparent product that gives an image only at one side, which can be used for an advertisement on the window or the like, which is a product that has a semi-transmissive-half-reflective layer having transmittance of 30% or higher and a reflectance of 30% or higher, a birefringent layer which is a patterned optically anisotropic layer having two or more regions of different birefringence in the form of a pattern or a driven-type optically anisotropic layer containing a liquid-crystal compound driven by voltage application to control the optical anisotropy, and a polarizing layer in this order and does not have, at the opposite side of the polarizing layer with respect to the birefringent layer, a polarizing layer, is provided.

Abstract: A product comprising a patterned optically anisotropic layer having two or more regions of different birefringence in the form of a pattern, which further comprises a semi-transmissive-half-reflective layer having a transmittance of 30% or higher and a reflectance of 30% or higher is provided. The product permits visualization of a latent image in the product through a polarizing plate as well as visualization of the information on the side opposite to the side to be viewed from.

Abstract: A product comprising a patterned optically anisotropic layer having two or more regions of different birefringence in the form of a pattern, comprising at least an intensity gradation-type pixel of approximately uniform birefringence and an area gradation-type pixel comprising two or more of drawing units of different birefringence, and each region of a single birefringence in the patterned optically anisotropic layer comprising a plurality of the drawing units is provided. The product permits the formation of full-color images (latent images) and includes delicate color representation, such as the densities of particular colors.