JP2576951Y2 - Writing implement - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a writing instrument.

[0002]

2. Description of the Related Art Conventionally, as a writing instrument, for example, marking
There are pens and the like, and there are types such as black, red, and blue. Such a pen naturally draws characters, pictures, and the like in colors such as black and red.

[0003]

[Problems to be Solved by the Invention] The conventional Markin
Gupen and the like do not change color at all and lack interest.
For example, when you write a letter in a certain place, it is not readable,
Bringing it elsewhere, for example outdoors or making it readable over time, is intriguing and interesting as a writing instrument.

[0004]

As a means for solving the above-mentioned problems, a fine powder metal compound, phenol and a water-absorbing substance are mixed in oily ink for a writing instrument, and a white or yellow oily ink is used. .

[0005]

The white or yellow ink makes it difficult to read characters and the like on white paper. However, by absorbing moisture and oxidizing the metal compound to exhibit brown, green or red, letters and the like emerge. Therefore, it is an interesting writing instrument that can be used for games.

[0006]

An embodiment will be described with reference to the drawings. FIG. 1 shows a cross section of a marking pen as a writing instrument 10. Reference numeral 1 denotes a plastic case, and reference numeral 2 denotes a sharp pen tip, which is made of a synthetic resin such as polyester.
Reference numeral 3 denotes batting such as nylon fiber, which is impregnated with ink. The ink used is an oil-based ink in which a white or yellow dye or pigment is dissolved using ethanol, ethyl acetate, toluene or the like as a solvent. As the metal compound, fine powder such as zinc carbonate and iron is used. Acrylic amide-based water-absorbing resin is used as the water-absorbing substance. To 100 parts of this ink, 20 parts of fine iron powder, 10 parts of phenol, and 10 parts of a water-absorbing resin are mixed, and the batting 3 is impregnated with the mixed liquid. When characters and the like are drawn on white paper using the marking pen 10 , the written characters are difficult to read because of the white ink. However, since the written ink contains a water absorbent resin,
It absorbs atmospheric moisture and oxidizes the iron powder contained. Due to this oxidation, iron turns brown and characters and the like emerge.

[0007] As a result of various experiments, the ink 100
Parts by weight, 10 to 50 parts of metal powder and 0.1 part of phenol.
Almost good results were obtained when the amount of the water-absorbing substance was in the range of 0.5 to 25 parts and the water-absorbing substance was in the range of 1 to 25 parts. The same was true even when the yellow ink was used. As described above, it is difficult to read characters at the beginning of writing by using white ink or yellow ink and containing metal powder, etc., but the characters float due to the absorption of moisture over time. It is an interesting writing instrument that can be raised.

[0008]

[Effect of the Invention] The writing implement of the present invention is difficult to read at the beginning of writing, but since the written characters can be read by absorbing moisture, it can be used in various fields such as games. A writing instrument.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a writing instrument (marking pen) of the present invention.

[Explanation of symbols]

1 case 2 pen core 3 batting 10 writing implement (marking pen)

Claims (1)

(57) [Scope of request for utility model registration] 1. A writing instrument in which a batting is impregnated with an oil-based ink and drawn with a pen core, wherein a finely powdered metal compound, phenol and a water-absorbing substance are mixed in the oil-based ink, and the oil-based ink is made white or yellow. A writing implement characterized by the following.