Most of the VOCs found in dry-erase markers are usually from the alcohol-based solvent, like diacetone alcohol or butanol, and other VOCs like xylene contribute to the distinctive marker smell. However, some VOCs are known to cause eye irritation, headaches, dizziness, and respiratory issues if inhaled in large quantities or absorbed through the skin. VOCs simply refer to a group of chemicals that can vaporize into the air, and they’re found in a variety of household products. Some organizations criticize EXPO markers for their potentially toxic effects, namely due to their high concentrations of volatile organic compounds (VOCs). That’s why dry-erase ink on a whiteboard or even glass can be easily wiped off with an eraser, paper towel, or a greasy hand. And unlike paper, whiteboards are nonporous, so the dry-erase ink only remains on the outermost layer of the board. This makes the ink “ slippery” so that the pigments can adhere to the whiteboard but don’t actually bind with the surface. But what separates dry-erase markers from other writing tools is their oily silicone-based polymer resin. The carrier is a water or alcohol-based solvent that helps carry the ink to the surface of the tip, and the pigments are what give the ink its distinctive color profile. Every marker typically has three main ingredients: a carrier, some pigments, and a resin. The design of dry-erase markers hasn’t changed too much since the original prototype. Interestingly, the whiteboard had already existed for over 30 years, mainly serving as a canvas for wet-erase markers, which had also been around for decades. throughout the 90s as a cleaner alternative to chalk. The Sanford Ink Company came out with their own dry-erase marker in 1976 called “EXPO,” and these markers grew popular in the U.S. Dry-erase markers were invented by Jerry Woolf of Techform Laboratories and later patented by the Pilot Pen stationery company in 1975.
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