A construction material includes a base material. The base material includes a low-gloss region having a 60 gloss value of smaller than and a high-gloss region having a 60 gloss value of larger than or equal to 8. The 60 gloss value of the low-gloss region and the 60 gloss value of the high-gloss region are different from each other by 5 or greater.

A compound capable of forming a surface layer excellent in oil repellency, a surface treatment agent containing such a compound, an article having a surface layer formed of such a compound, and a method for manufacturing such an article are provided. A compound according to the present invention is represented by (R.sup.f1-L.sup.2).sub.y1-L.sup.3-R.sup.1-L.sup.1-(R.sup.2-T.sup.1).sub.x1. R.sup.f1 is a fluorine-containing group; L.sup.2 is a single bond or a divalent linking group; L.sup.3 is an organopolysiloxane residue having a valence of 1+y1; R.sup.1 is a single bond, a fluoroalkylene group, an alkylene group, or an alkylene group containing an etheric oxygen atom; L.sup.1 is a single bond or a group having a valence of 1+x1; R.sup.2 is an alkylene group or an alkylene group containing an etheric oxygen atom; T.sup.1 is a reactive group; y1 is an integer of 1 or greater; and x1 is an integer of 1 to 10.

An airfoil element including an airfoil having a pressure side and a suction side, an aluminum alloy substrate and a coating system atop the substrate, said coating comprising in at least one location an anodize layer (24) having a thickness (T.sub.A) of 1.0 to 5.0 micrometer, a sealant (36) filling at least 5.0% of porosity in the anodize layer or at least 0.7% of an apparent volume within a height of the anodize layer, a sealant primer (40) filling 50.0% of porosity in the anodize layer or at least 6.5% of an apparent volume within a height of the anodize layer and extending at least flush to the anodize layer, a second primer (44) over the sealant primer having a thickness (T.sub.S) of 5.0 to 50 micrometer and a polymeric coating (48) having a thickness (T.sub.T) of 10.0 micrometer to 1.0 millimeter.

A curable composition comprises at least one polymerizable compound and alpha-alumina particles. The alpha-alumina particles, taken as a whole, have a D.sub.V50 of less than 100 nanometers. The corresponding cured composition, and an abrasion-resistant article comprising an abrasion-resistant layer comprising the reaction product disposed on a substrate are also disclosed. A method that includes thermoforming the abrasion-resistant article is also disclosed.

A transparent invisible multilayer structure and a preparation method thereof are provided. The preparation method includes: coating a layer of a transparent liquid coating onto a side of a transparent carrier film; pressing protrusions of a transfer mold against the transparent liquid coating, curing, and peeling off the transfer mold after the curing, with recesses matching the protrusions in shape formed on a resulting cured liquid coating, thereby obtaining a recessed see-through layer; printing a light shielding layer on a side of the recessed see-through layer away from the transparent carrier film, such that first through holes are provided; and printing a decorative layer on a side of the light shielding layer away from the transparent carrier film, such that second through holes are provided, and the second through holes are interconnected with the recesses via the first through holes to form light-transmitting holes respectively, thereby obtaining a multilayer structure.