![]() You can check our Eraser Details table to see which of our erasers are made with limited amounts of harmful and harmless phthalates. Caran Dache - Mechanical Pencil - Refills - Pencil Eraser. Products marked as “phthalate free” may still contain miniscule amounts of regulated phthalates as well as phthalates that have not been shown to be harmful. Acme Refills Erasers for 4FP Four Function Pen 6 Pack Pencil. ![]() Some people prefer to avoid these phthalates altogether, though we should note that the chance of exposure from erasers is extremely low. Phthalates that have been shown to be potentially harmful are regulated at the state and federal levels in the United States. These help make plastics flexible, but certain varieties may affect people’s health if ingested. Erasers pick up graphite particles, thus removing them from the surface of the paper. Plastic is a popular material for erasers because it is easily manipulated to have different shapes and properties.Īll vinyl erasers are made with chemical compounds like phthalates. ![]() Soft vinyl erasers are similar to rubber erasers in that they may be abrasive enough to damage paper, but manufacturers have experimented with different types of plastic to minimize paper damage. Leftover residue tends to clump together for disposal. Planner Stickers, Pens, Stamps, and MoreĪlso known as plastic erasers, soft vinyl erasers erase cleanly and easily.Japanese Stationery: What's the Big Deal?.The Difference Between Ballpoint, Gel, and Rollerball Pens.You also don't have to worry about allergies with vinyl, as you would with rubber and latex. Of course, there is concern about the environmental consequences of phthalates which have been accused of having endocrine-disruptive effects. For example, white vinyl erasers can clean ivory very well. ![]() Vinyl erasers tend to be more gentle on paper than the rubber variety. To make it soft and pliable, a plasticizer such as dioctyl phthalate is added, and to improve abrasion qualities some calcium carbonate, or chalk, is included. Polyvinyl chloride, or PVC, may be familiar to people as the “vinyl” of car roofs or old-fashioned long-playing records, but this synthetic polymer can also be formulated into erasers. Just like everything else, erasers have changed with the times. So much so that today, a pink dye is actually used. The original accelerator had a pink color the erasers sold well and the tradition has been maintained. When it is made, a chemical called an accelerator is added to help join the monomers, or small molecules, into a polymer. Why is the traditional eraser pink? Today, erasers are usually made from synthetic rubber, which is a polymer. Deeper penetration is needed, which of course, will damage the paper. Why does it not work on ink as well? Ink is absorbed into the paper, unlike graphite. Basically, this is the stuff that is used on sandpaper but is ground extremely fine for inclusion in erasers. A fine pumice powder made of about 75% silicon dioxide and 25% aluminum oxide is added to the rubber. Less expensive erasers are made from synthetic rubber and synthetic soy-based gum, but more expensive or specialized. This increases the resiliency and reduces the rigidity. BEST FOR COLORED PENCILS: Tombow 67304 MONO Sand Eraser, 2-Pack. For one, the rubber is vulcanized, meaning it has been treated with sulfur. Chemists have worked on this problem and have improved on the original rubber. So we do not want a substance that is too abrasive. The trick, of course, is to remove the graphite without damaging the paper. ![]() Pencils deposit a thin layer of graphite on paper, a layer that can be removed with the gentle rubbing of an eraser. It would neatly rub pencil marks off of paper! He gave it the name "rubber", a name that is still used in England to describe, what we refer to, as the "eraser".īy the physical action of abrasion. This is how the first bouncing balls were born! Explorers took some samples of the stuff back to Europe where Joseph Priestley, the brilliant English chemist who, among other things, discovered soda water and oxygen, found a use for the material. They formed the wet latex into balls and allowed them to dry. When Europeans first came to South America, they found that the Natives were making interesting use of the sap of a tree. On multiple-choice exams, little circles are still coloured in with pencils and if a mistake is made, an eraser is needed. But that doesn't mean pencils and erasers have disappeared. These days we are accustomed to pressing the delete key and a word on the screen disappears, ready to be replaced by a few keystrokes. ![]()
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