Chemical stains (acid stains) are water acidic solutions of metallic salts react with the lime inside the concrete. After the chemical reaction is completed, the stains (that are actually metallic oxides) become integral section of the concrete and gives it an attractive mottled colored surface. The critical portion of coloring concrete surfaces by having an acid stain or chemical stain could be the reaction between the stain and lime from the concrete. -stained_concrete-
In many remodeling projects many people want to rip up their carpets, tile and linoleum and think they are able to acid stain the current concrete substrate and achieve an attractive surface. Unfortunately, it's not that simple. Concrete resurfacing which has a self leveling concrete or micro topping is needed in the following cases.
Sometimes carpets are glued as a result of the concrete substrate. Set up carpet glue is taken off, there could be some glue residue left inside the pores of the concrete which provides a resist or may create staining on the surface. It will be a very good idea to cover the entire surface using a thin concrete overlay to obtain desired results. -stained_concrete-