Coloring and texturing of {packet|stone|large rock} and tile
Colour
{The color|Along with} of structural clay products may be natural or applied. Natural and applied colouring are described below.

NATURAL COLOURS
These {rely upon} {the sort of} clay used in the availability processes. {They will|That they} range from whites through grays, buffs, light to dark reds, and into the purple range. Fireclays are associated with the lighter colours {including the} grays and buffs. Ordinary clays and shales are associated with the red {runs|amounts|varieties}. By regulating the oxidizing conditions in the kiln, browns, purples, and blacks can be obtained. The process is known as flashing, and {generally speaking|on the whole} the change of colour of the bricks {is merely} on {the top|the area|the}, the body of the unit retaining {the|their|it is} natural colour. Some {alloys|materials|mining harvests}, such as manganese, are mixed with the clays {to build up|to produce|to formulate} special colours.

{USED|UTILIZED} {COLORS|SHADES}
Colours are applied to many structural {clay-based|clay surfaces} products, particularly structural glazed tile, floor and {wall structure|wall membrane} tile, and brick. {Hard|Porcelain} glazes are applied to units before or after the firing and {chilling|air conditioning|cooling down} stage. If after, the units must be refired. These glazes provide almost all of the basic colours plus some special colours used for {highlight|accentuate|feature} in {the style of|the appearance of} {a wall structure|a wall membrane}. The glazes become an integral part of the face of the {models|devices|products} since they are {burnt|burned up|used up} to the same {level of|amount of} heat as the {models|devices|products}. Finishes and colours {besides|apart from|aside from} ceramic glazes are {put on|placed on|used on} the units either {terminated|dismissed} or unfired and are surface coatings that {hide|cover up|disguise} the natural colour of the burned unit. {In certain|In a few} countries a demand for old brick has {red|led pre lit|xmas trees} to application of {mixes|blends|combos} of cement or {lime green|lime scale} and sand and many other combinations to give brick an aged appearance.
Texture
The texture of structural clay products is directly associated with the manufacturing processes. Thesoft-mud process produces whether sand- or water-struck finish in a nonuniform texture, which {offers|presents} the brick (only {stones are|voilier are} made under this process) the appearance of handmade or antique {packet|stone|large rock}. The dry-press process, using steel molds, gives a smooth texture only. This kind of process is seldom {utilized in|employed in|found in} modern-day brick production but {can be used|is employed} in the {produce|make|production} of quarry tile as well as floor and wall tile.
The stiff-mud process offers the most possibilities for texturing {packet|stone|large rock}. As the prepared {clay-based is|clay surfaces is} extruded through the die, the pressure produces a smooth surface similar to that of {cement|concrete floor|asphalt} when smoothed with a steel trowel. This surface is called the {pass away|perish|expire} skin; its removal and further treatment produce other textures. In wire {trimming|slicing|reducing}, for instance, {a cable|a line} {put|located} {ahead of the|before the} column of clay as it comes from the die {gets rid of|takes away|cleans away} the die skin, creating a semi-rough surface. Found in sand finishing, sand is applied to the {line|steering column} of clay by various {way to|ways to|methods to} give a very even surface of {fine sand|crushed stone|yellow sand}, which is fired into the unit. {The required|The specified} {consistency is|structure is|feel is} similar to a wood-mold brick except that the unit is {a lot more|far more|considerably more} uniform in size and in finish. Colour also may be changed by {the sort of} sand used.
{Obtained|Have scored|Won} finishing {can be used|is employed} mostly on tile where the surface of the tile is grooved to give {an improved} bond between the {device|product} and plaster. This is also true of a roughened or combed {complete|end|surface finish} produced by wire {cleaning|scrubbing|combing} or scratching. Roughened {completing can be used|completing is employed|concluding can be used|concluding is employed|polishing off can be used|polishing off is employed} when the {pass away|perish|expire} skin is removed by various means. In a single method the materials cut in removing the die skin may be rolled {back to|back in|into} the face of the unit. {Additional|Various other|Different} finishes are applied by rollers on the {line|steering column} to give certain results such as bark, {sign|record|journal}, or emblems.
Terra-cotta for architectural decoration is both machine-extruded and handmade (molded or pressed). It is distinguished {from all other|from the other} clay products by the commonly {bigger|greater|much larger} size of the {models|devices|products}. It may be hand-made and used mostly in murals as bas-relief. {The two|Equally|Both equally} natural and glazed {surface finishes are|completes are} produced.