Like traditional kneaded erasers, poster putty also loses its efficacy with use, becoming increasingly tacky as the material grows polluted with debris and oils from the user's skin.
Of the many brands available, Blu-Tack has become a favorite of graphite artists around the world. The electric eraser consists of a knob in a short thin rod attached to a miniature motor. A button located on one side turns the motor on once pressed, and off when pressure is released from the button.
As the knob of eraser turns at a relatively rapid speed, it achieves a smooth and complete area of erasure with a minimum of trauma to the paper. The main purpose this device is designed for is erasing pencil lines or shading completely and precisely in a short time, compared to using a kneaded eraser.
Soft vinyl has a plastic-like texture and erases more cleanly than standard pink erasers. They are somewhat softer and non-abrasive, making them less likely to damage canvas or paper. They are prone to cause smearing when erasing large areas or dark marks, so these erasers are more frequently used for erasing light marks and precision erasing. Engineers favor this type of eraser for work on technical drawings due to their gentleness on paper.
Vinyl erasers are commonly white. A less common type of eraser is used to erase pen. Pulverized pumice is blended into this type of eraser to make it abrasive. However these erasers also remove some layers of the paper so the paper becomes extremely thin and can tear.
This eraser is typically a half pen eraser and a half "art gum" eraser. It is used by those who like the look of a pen and the changability of a pencil. Another type of eraser is used specifically for marks on a chalkboard or whiteboard. Rather than being rubbery or gummy like pencil erasers, it is a hand-held wooden or plastic block with a dark felt pad on one side.
Erasers come in several shapes and sizes. Erasers are made in different shapes, sizes and colors and from various materials. Cheaper ones are made of synthetic soy-based gum or synthetic rubber while those of higher quality can be made from vinyl, plastic, or gum-like materials.
People tried to correct mistakes they made while writing even before eraser was invented. To erase marks from the paper, they used tablets of rubber or wax. To remove ink from parchment or papyrus they used bits of rough stone like sandstone or pumice. In Japan, they used soft bread.
It was not until that we found out that a natural rubber made from plants can be used as an eraser. Or try your hand at trying to make a tiny person! Only the most awesome of kneaded eraser sculptors have been able to achieve this monument to miniatureism. You can even have a kneaded eraser tea party! Stress Relief — Pretend the eraser is the head of someone you are really annoyed by! Stretching, tearing, pulling it apart, and threatening to torture it if it should refuse to tell you the location of the rebel base are great ways to de-stress AND to clean your eraser at the same time!
Warning, however, that these erasers are not immortal just nearly. Once they become dark and hard, they are too saturated with graphite to work and may actually leave marks instead of erasing them! Moist bread. Until the s, humanity's preferred way of erasing errant graphite marks relied on bread that had been de-crusted, moistened and balled up. While these erasers were cheap and plentiful, they had a distinct disadvantage: They were, you know, made of bread.
They were susceptible, like all bread, to mold and rot. Talk about a kneaded eraser. The same guy who discovered oxygen helped to invent erasers. In , the natural philosopher and theologian Joseph Priestley —discoverer of oxygen and, with it, the carbonated liquid we now know as soda water— described "a substance excellently adapted to the purpose of wiping from paper the mark of black lead pencil.
Erasers were invented by accident. Though Joseph Priestly may have discovered rubber's erasing properties, it's the British engineer Edward Nairne who is generally credited with developing and marketing the first rubber eraser in Europe. And Nairne claimed to have come upon his invention accidentally: He inadvertently picked up a piece of rubber instead of breadcrumbs, he said, thereby realizing rubber's erasing properties. It was Priestley who is generally credited for naming rubber.
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