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The pen spinning community is present mostly on the Internet through forums, video hosting platforms, and chat services such as Discord. Forums are often centered in specific countries, such as Japan, France, Germany, India and China. Forums may also be international, as is the case with the Universal Pen Spinning Board and Reddit-based ...
Paper and ink testing Tests for paper and ink interaction A variety of tests are used to determine ink and paper and paperboard quality, and to measure their interactions. They are necessary to balance print quality, cost, and wear on the press. Some of the important paper and ink tests are listed here:
Dye penetrant inspection (DP), also called liquid penetrate inspection (LPI) or penetrant testing (PT), is a widely applied and low-cost inspection method used to check surface-breaking defects in all non-porous materials (metals, plastics, or ceramics).
Blotting paper is a highly absorbent type of paper used to absorb ink or oil from writing material, particularly when quills or fountain pens were popular. It could also be used in testing how much oil is present in products. Blotting paper referred to as bibulous paper is mainly used in microscopy to remove excess liquids from the slide before ...
Pen spinning — using one's fingers to manipulate an ordinary inexpensive writing-pen — can be performed anywhere. Sometimes classified as a form of contact juggling, pen spinning may also include tossing and catching of the pen. Called "rōnin mawashi" in Japan, where it is popular among the per-collegiate community, pen twirling has its ...
Diagram-based notations are the clearest way to show juggling patterns on paper, but as they are based on images, their use is limited in text-based communication. Ladder diagrams track the path of all the props through time, where the less complicated causal diagrams only track the props that are in the air, and assumes that a juggler has a ...
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 ...
In general, permanent marker ink comprises a main carrier solvent, a glyceride, a pyrrolidone, a resin, and a colorant, [1] making it water resistant.It is capable of writing on a variety of surfaces from paper to metal to stone.