7/31/2023 0 Comments Variable color muse![]() This is harder, more glossy and stain resistant compared to the original surface. The resulting calcium hexafluorosilicate (CaSiF 6) is bonded to the surface of the marble. The chemical reaction below shows a typical process using magnesium fluorosilicate (MgSiF 6) and hydrochloric acid (HCl) taking place.ĬaCO 3(s) + MgSiF 6(l) + 2HCl (l) → MgCl 2(s) + CaSiF 6(s) + CO 2(g) + H 2O(l) It involves polishing the surface with an acidic solution and a steel wool pad on a flooring machine. Vinegar and other acidic solutions should be avoided in the cleaning of marble products.Ĭrystallization refers to a method of imparting a glossy more durable finish on to a marble floor (CaCO 3). Outdoor marble statues, gravestones, or other marble structures are damaged by acid rain whether by carbonation, sulfation or the formation of "black-crust" (accumulation of calcium sulphate, nitrates and carbon particles). Chemistry Degradation by acids Īcids react with the calcium carbonate in marble, producing carbonic acid (which decomposes quickly to CO 2 and H 2O) and other soluble salts : CaCO 3(s) + 2H +(aq) → Ca 2+(aq) + CO 2(g) + H 2O (l) These various impurities have been mobilized and recrystallized by the intense pressure and heat of the metamorphism. Green coloration is often due to serpentine resulting from originally magnesium-rich limestone or dolomite with silica impurities. The characteristic swirls and veins of many colored marble varieties are usually due to various mineral impurities such as clay, silt, sand, iron oxides, or chert which were originally present as grains or layers in the limestone. Pure white marble is the result of metamorphism of a very pure ( silicate-poor) limestone or dolomite protolith. ![]() Primary sedimentary textures and structures of the original carbonate rock ( protolith) have typically been modified or destroyed. ![]() The resulting marble rock is typically composed of an interlocking mosaic of carbonate crystals. Metamorphism causes variable recrystallization of the original carbonate mineral grains. Marble is a rock resulting from metamorphism of sedimentary carbonate rocks, most commonly limestone or dolomite (rock). Or read the excerpt of our industry report.Folded and weathered marble at General Carrera Lake, Chile Also read our blog post with an overview related to low cost devices. We included this card in the list together with the card from Techkon. A new development that is closely related to this subject is the use of color calibration cards in combination with a smart phone. We guesstimate the total number of devices to be 100.000+ while the manufacturers expect this number to go over the millions. We think most manufacturers want to go for the big numbers but it seems that a real breakthrough is not there yet. ![]() For this purpose we see that manufacturers are extending their apps to give Lab and RGB data of the measured color which can be used for other purposes than searching a fan deck. Especially if the user scenario extends to areas like fashion and photography. Given the low price we expect that prosumers will also be interested to use these devices. LCCDs are meant to be used by professionals like painters and architects. Each LCCD use specific technologies but in most cases will do the job to identify a fan deck color. LCCDs are often assisted by an App and can help you to do that. Without a color fan deck it is almost impossible to determine the color but even if a fan deck with color chips is available it is not easy to identify the closest color match in the fan deck. The basic scenario for LCCDs can be described as follows: suppose you want to know the paint color of an object like a wall. LCCDs carry alluring names like Nix, Muse, Nano, ColorReader, Capsure, Node, and Pico. Devices (spectrophotometers) for measuring color are usually quite expensive (€/$ 5k-20k) but in the last 10 years low cost devices with specific functionalities entered the markets and new developments are added every year. The list mentions basic information of each device (LCCD) that will help you in a buying decision for your business or activities. Welcome to our list of 12 low cost color devices to measure color digitally!
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