A Green Card holder who is not a minor can file Form N-400, Application for Naturalization, to obtain US citizenship. Similarly, he must have become a permanent resident before five years and must have remained as a permanent resident in America for at least five long years.
Now, flat paint is (usually) a latex paint that dries without a reflective finish-that's it-the finish is smoother (imho) than chalk paint. Chalk paint really dries quickly and it has a rough texture to it after it dries. Many people use wax or poly-acrylic sealant on top of their furniture piece to keep the paint from peeling. So there ya go, my best explanation.
Between those two extremes, there is a number of intermediate gloss levels. Their common names, from the most dull to the most shiny, include: flat, matte, eggshell, satin, silk, semi-gloss and high gloss. These terms are not standardized, and not all manufacturers use all these terms.lossy paints are shiny and reflect most light in the specular (mirror-like) direction, while on matte paints most of the light diffuses in a range of angles. The gloss level of paint can also affect its apparent colour.