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A counterfeit banknote detection pen, used to detect fake banknotes. A counterfeit banknote detection pen is a pen used to apply an iodine-based ink to banknotes in an attempt to determine their authenticity. The ink reacts with starch in wood-based paper to create a black or blue mark but the paper in a real bill contains no starch, so the pen ...
Invisible ink can be applied to a writing surface with a specialty purpose stylus, stamp, fountain pen, toothpick, calligraphy pen, Cotton swab, or even a finger dipped in the liquid. Once dry, the written surface looks as if it were blank, with a similar texture and reflectivity as the surrounding surface.
Ink is used for drawing or writing with a pen, brush, reed pen, or quill. Thicker inks, in paste form, are used extensively in letterpress and lithographic printing. Ink can be a complex medium, composed of solvents, pigments, dyes, resins, lubricants, solubilizers, surfactants, particulate matter, fluorescents, and other materials. The ...
A ballpoint pen, also known as a biro [1] (British English), ball pen (Hong Kong, Indonesia, Pakistani, Indian and Philippine English), or dot pen [2] (Nepali English and South Asian English), is a pen that dispenses ink (usually in paste form) over a metal ball at its point, i.e., over a "ball point".
The marker is a felt-tipped pen with quick–drying water–based ink. [5] In 1979, Paper Mate introduced the Eraser Mate or Erasermate brand. [6] In the 1980s, Paper Mate invented the Replay 2000 pen, with erasable ink and a rubber at one end. In 2010, Paper Mate introduced "environmentally friendly" biodegradable pens, pencils and erasers. [7]
An AG-7 Astronaut Space Pen in presentation case. Bullet pen. The Space Pen (also known as the Zero Gravity Pen), marketed by Fisher Space Pen Company, is a pen that uses pressurized ink cartridges and is able to write in zero gravity, underwater, over wet and greasy paper, at any angle, and in a very wide range of temperatures.
WobbleWorks launched a Kickstarter campaign for the 3Doodler on February 19, 2013, with an initial fundraising target of $30,000. The campaign closed on March 25, 2013. The $50 reward level was the minimum needed to receive the product, with highly recommended reward levels of $75 and $99 including more bags of plastic thread, and the highest level of $10,000 including a "membership in the ...