The concept of a spray is known to all, but many would struggle to describe a spray precisely. A suitable definition for a spray is a mist scattered within a gas. A familiar example would be what is produced by spraying a can of underarm deodorant. The liquid inside the can is turned into a mist, which is of course dispensed into the air. It can easily be understood how this ties in with the definition.
Fleshing out the definition, the liquid in the illustration is of course the deodorant product. Once dispensed, the gas it is distributed within is of course the air. There are also instances where a spray is used in a medium other than air, such as where particular fluids can be sprayed into the fumes of power plants to make them less damaging to the environment.
The process of creating a spray is sometimes called atomization. In practice, the liquids are not literally split down into individual atoms, but rather, small liquid droplets. The significance of changing liquids into this state can be seen by looking at some examples of how sprays are used. Since liquid sprays are used in so many applications, only a selection will be considered.
One area where spraying has great usefulness is in the food and drinks industry. As well as spray washing fresh produce, foods can be coated with flavorings, or any other additives, using a spray. In the case where a food requires a spicy coating, a spray allows the precise amount of this to be controlled. If spice mix was simply poured on, it could easily end up far too hot for many people. Also, sprays allow an even quantity to be distributed over the entire surface.
Staying with food and drink, many commonplace foods are created using a technique called spray drying. Here, liquid products are turned into a fine spray, which is dried out in hot air. Instant coffee, milk powder, colorings and spice powders are made with this process.
A more common and well recognized use of sprays is that of spray painting, although there are more refined examples of this than the simple can of spray paint that immediately comes to mind. Whatever product has to be painted can be made to literally attract the paint, by using electrical charges. The product and the paint are charged oppositely, and this is called electrostatic spray painting. Using this technique can be advantageous where paint has to be applied into tight spots which a paintbrush cannot reach.
One final example of the importance of spray techniques is that of fuel sprays. Fuel sprays are used in a huge variety of engine types, such as petrol, diesel and jet engines, as well as steam boilers and even rocket engines. The fuel is atomized prior to being ignited, and the fact it has been atomized is very important. This maximizes the surface area of the fuel and mixes it with the air, creating the optimum conditions for combustion.
While the finer details of what a spray actually is elude most people, their myriad applications in food manufacture, in generating power, in fueling our engines and also in everyday things like deodorants and spray paint, demonstrates how important they really are.
Fleshing out the definition, the liquid in the illustration is of course the deodorant product. Once dispensed, the gas it is distributed within is of course the air. There are also instances where a spray is used in a medium other than air, such as where particular fluids can be sprayed into the fumes of power plants to make them less damaging to the environment.
The process of creating a spray is sometimes called atomization. In practice, the liquids are not literally split down into individual atoms, but rather, small liquid droplets. The significance of changing liquids into this state can be seen by looking at some examples of how sprays are used. Since liquid sprays are used in so many applications, only a selection will be considered.
One area where spraying has great usefulness is in the food and drinks industry. As well as spray washing fresh produce, foods can be coated with flavorings, or any other additives, using a spray. In the case where a food requires a spicy coating, a spray allows the precise amount of this to be controlled. If spice mix was simply poured on, it could easily end up far too hot for many people. Also, sprays allow an even quantity to be distributed over the entire surface.
Staying with food and drink, many commonplace foods are created using a technique called spray drying. Here, liquid products are turned into a fine spray, which is dried out in hot air. Instant coffee, milk powder, colorings and spice powders are made with this process.
A more common and well recognized use of sprays is that of spray painting, although there are more refined examples of this than the simple can of spray paint that immediately comes to mind. Whatever product has to be painted can be made to literally attract the paint, by using electrical charges. The product and the paint are charged oppositely, and this is called electrostatic spray painting. Using this technique can be advantageous where paint has to be applied into tight spots which a paintbrush cannot reach.
One final example of the importance of spray techniques is that of fuel sprays. Fuel sprays are used in a huge variety of engine types, such as petrol, diesel and jet engines, as well as steam boilers and even rocket engines. The fuel is atomized prior to being ignited, and the fact it has been atomized is very important. This maximizes the surface area of the fuel and mixes it with the air, creating the optimum conditions for combustion.
While the finer details of what a spray actually is elude most people, their myriad applications in food manufacture, in generating power, in fueling our engines and also in everyday things like deodorants and spray paint, demonstrates how important they really are.
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Indoor tanning sessions require a specially constructed sun labs to be successful. Use of the right sunless tanning lotion is the other component in the process.
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