Twist-Erase III Mechanical Pencils feature a sturdy ... grip delivers maximum comfort and control With the jumbo Twist-Up Eraser, you'll suffer no smudges, no paper tears and no ghosts Each ...
There are some inventions that look completely pointless to the untrained eye: who would ever need a motorized garbage can, an electric pencil sharpener or a battery-powered eraser? Quite often ...
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11 Things You Can Clean With a Magic Eraser—and 6 You Can't, According to ExpertsThis polymer sponge works like a pencil eraser. The active ingredient is melamine (a nitrogen-rich organic base) that acts as a mild abrasive, lifting the staining material. As it does ...
The pencil “lead” is actually a mixture of graphite and clay. More clay in the mixture makes the lead harder. A harder lead has a higher number. Pencils are numbered from 1-3 but most people use a ...
Smithsonian Magazine on MSN15d
Microplastics Are Making Photosynthesis Harder for Plants—and That Could Slash Crop Yields, Study SuggestsOn average, these little particles could reduce photosynthesis in plants and algae by up to 12 percent, according to the paper ...
Pencils, erasers, ballpoint pens - it was always fun to start a new term with a new brace of equipment in your pencil case. And have you ever thought about the history behind those school essentials?
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