Lead was utilized to get written down, as lead is a delicate material and makes dim imprints. Essentially lead is poisonous and undependable to utilize, the other option utilized for composing is a material called Graphite. This material makes hazier imprints than lead. I would commit a great deal of errors as a kid in school while composing with pencil; the most fundamental of our devices from pencil box was the Eraser (we called it elastic). We learnt in school how elastic was made.
The Normal elastic came from a sap of the tree called Para elastic tree. The normal plastic is extricated from the tree trunk and afterward handled to shape an elastic. As in history the Para elastic tree filled in South America and it is said that a first European to get back to Portugal from Brazil with tests of water-repellent rubber treated fabric stunned individuals that it was taken as a black magic and prosecuted. First time when the examples of elastic showed up in Britain, Joseph Priestley in the year 1770 was who first time found that the piece of the elastic was very great for eradicating pencil blemishes on the paper and thus the name was given as elastic.
Before elastic erasers were found tablets of wax were utilized to eradicate lead/charcoal imprints from paper. It is additionally found that to delete pencil mark the utilization of moved up slice of bread was utilized (outside was cut off). Some craftsman actually use to ease up charcoal or pastel imprints. Erasers have a rubbery consistency as they are produced using elastic and are much of the time in white or pink tone, however the cutting edge materials permit Erasers to be made in many tones.
The typical Erasers are made of manufactured elastic, however there are specific Erasers which are more costly which additionally contain vinyl, plastic, or gum-like material. The various sorts of Erasers that you will find in the market are 1. Craftsmanship gum: this eraser type is extremely famous among the specialists. 2. Worked Erasers: the specialty of this eraser is that it doesn’t erode or abandon eraser buildup. 3. Electric erasers 4. Delicate vinyl erasers which have a plastic like surface and eradicate more neatly than the standard pink erasers.