Sieving is a conjugation of the verb sieve: the action of causing some substance to pass through a sieve (a instrument that allows to separate larger particles from smaller ones). Sieving, therefore, is the process that takes place when using one of these devices.
Sifting can be said to be a separation method. Suppose we have a mixture composed of two solid substances, whose particles have different thicknesses; If we put it on a sieve and begin to press it properly, the smallest particles will pass through the net, while the largest will be retained. In this way the separation will take place.
Yes one person has a jar with sunflower seeds and sugar, you can use sieving to separate these ingredients. For this you will use a sieve and another container: by dumping the contents of the jar on the sieve, the sugar will fall into the second container, while the sunflower seeds will be retained by the sieve. At the end of the process, you will have the sugar on one side and the sunflower seeds on the other.
The success sieving will depend on the size of the orifices or pores of the sieve. If these holes are very large, it is likely that certain elements cannot be separated. In turn, if the holes are small in relation to what is to be separated, the two substances will remain on the sieve and separation will not be achieved either.
It is also important to note that sieving is used with solid elements. Two liquids cannot be separated with a sieve as both will pass through the plot.
It is important to mention that sieving is a procedure used in various fields, such as cooking, agriculture and chemistry. For example, in baking it is common to use a sieve to spread powdered ingredients such as sugar icing, cinnamon or cocoa on cakes or tarts; The purpose of the casting process, in this case, is to eliminate those parts that are too thick or lumpy, to get the ingredient to adhere and mix correctly on the surface of the plate.
Another example within gastronomy in which sieving is used is the preparation of dough, especially if yeast is not used; When someone decides to make a cake or a pizza, among many other recipes, without yeast, it is advisable to sift the flour more than once, so that the particles and the result is an airy and malleable mixture. This step is necessary especially when the flour appears wet in the package.
Sifting the earth, on the other hand, is also a widely used resource in gardening to clean it of small stones and leaf debris, among other elements that we do not want to include in a certain job. This is used very often during compost preparation, a mixture of organic material which serves to improve the characteristics of the soil, since it provides a series of nutrients that are very necessary for the proper development of plants and flowers.
Before spreading the compost in the area of the ground that we want to treat, it is always advisable to sift it, and for this we only need a sieve, a tool that is inexpensive and even easy to make at home, since it simply consists of a rectangle of metal mesh supported by a wooden edge.
The objective of sifting, in this case, is to eliminate from the compost all kinds of elements that can contaminate it and, therefore, undermine the benefits that we intend to obtain from its contact with the soil, such as pieces of plastic, branches and stones. On the other hand, it also improves your texture and this has a positive effect on its application.