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The longevity and usefulness of stone can be extended by sealing its surface effectively, so as to exclude harmful liquids and gases. The ancient Romans often used olive oil to seal their stone. Such treatment provides some protection by excluding water and other weathering agents, but it stains the stone permanently.
The rough texture of the face is created by running the concrete across a cast-iron face plate or by using a plaster mold taken from a cut stone block. [3] This process of texturing concrete block was streamlined by an inventor named Harmon S. Palmer who created a machine that combined the processes of texturing and forming the concrete blocks.
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Illustration to Serlio, rusticated doorway of the type now called a Gibbs surround, 1537. Although rustication is known from a few buildings of Greek and Roman antiquity, for example Rome's Porta Maggiore, the method first became popular during the Renaissance, when the stone work of lower floors and sometimes entire facades of buildings were finished in this manner. [4]
Another factor in stain removal is the fact that stains can sometimes comprise two separate staining agents, which require separate forms of removal. A machine oil stain could also contain traces of metal, for example. [1] Also of concern is the color of the material that is stained.
A rotary machine known as a multi disc sander or buffer is then used for the final sanding steps. The buffers take abrasive discs, which rotate in same plain is the floor itself. The power of the stripping relies on the weight of the machine and therefore can be useful for surface treatments like buffing, light sanding or stripping old sealants.
A floor scrubber. A floor scrubber is a floor cleaning device. It can be a simple tool such as a floor mop or floor brush, or in the form of a walk-behind or a ride-on machine to clean larger areas by injecting water with cleaning solution, scrubbing, and lifting the residue off the floor.
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