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  2. Copying pencil - Wikipedia

    en.wikipedia.org/wiki/Copying_pencil

    A letter written with an indelible pencil by Mohandas Karamchand Gandhi in Natal, South Africa, on 6 January 1909 to a friend, Olive Doke, mentioning Mrs. Gandhi's illness and a trip to Inanda falls. A copying pencil, also an indelible pencil or chemical pencil, [1] is a pencil whose lead contains a dye. The lead is fabricated by adding a dry ...

  3. Permanent marker - Wikipedia

    en.wikipedia.org/wiki/Permanent_marker

    Permanent markers are used for writing on metals, plastics, ceramics, wood, stone, cardboard etc. However, the mark made by them is semi-permanent on some surfaces. Most permanent marker ink can be erased from some plastic surfaces (like polypropylene and teflon) with little rubbing pressure. They can be used on ordinary paper, but the ink ...

  4. Pencil - Wikipedia

    en.wikipedia.org/wiki/Pencil

    Ferrule. Eraser. A pencil (/ ˈpɛnsəl / ⓘ) is a writing or drawing implement with a solid pigment core in a protective casing that reduces the risk of core breakage and keeps it from marking the user's hand. Pencils create marks by physical abrasion, leaving a trail of solid core material that adheres to a sheet of paper or other surface.

  5. The Adventure of the Retired Colourman - Wikipedia

    en.wikipedia.org/wiki/The_Adventure_of_the...

    Amberley had lured his wife and her lover—for so he had believed Dr Ernest to be—into the strongroom, locked them in, and turned the gas on, killing them out of jealousy. He had simply hidden the "stolen" valuables somewhere. In indelible pencil, one of the victims wrote "We we…", perhaps meaning to write "We were murdered." Amberley ...

  6. Election ink - Wikipedia

    en.wikipedia.org/wiki/Election_ink

    v. t. e. Electoral ink, indelible ink, electoral stain or phosphoric ink is a semi-permanent ink or dye that is applied to the forefinger (usually) of voters during elections in order to prevent electoral fraud such as double voting. It is an effective method for countries where identification documents for citizens are not always standardised ...

  7. Gel pen - Wikipedia

    en.wikipedia.org/wiki/Gel_pen

    A gel pen uses ink in which pigment is suspended in a water -based gel. [1] Because the ink is thick and opaque, it shows up more clearly on slick surfaces than the typical inks used in ballpoint or felt tip pens. Gel pens can be used for many types of writing and illustration. The general design of a gel pen is similar to that of a regular ink ...

  8. Marker pen - Wikipedia

    en.wikipedia.org/wiki/Marker_pen

    The tip of a green felt-tip pen A box of colored felt-tip pens Marker pen. A marker pen, fine liner, marking pen, felt-tip pen, felt pen, flow marker, sign pen (in South Korea), vivid (in New Zealand), flomaster (in Russia), texta (in Australia), sketch pen (in South Asia), koki (in South Africa) or simply marker is a pen which has its own ink source and a tip made of porous, pressed fibers ...

  9. Ink - Wikipedia

    en.wikipedia.org/wiki/Ink

    Ink. Bottles of ink from Germany. Writing ink and a quill. Ink is a gel, sol, or solution that contains at least one colorant, such as a dye or pigment, and is used to color a surface to produce an image, text, or design. Ink is used for drawing or writing with a pen, brush, reed pen, or quill. Thicker inks, in paste form, are used extensively ...