Black signature pens refer to pens specially used for signing or signing samples, including water-based signature pens and oil-based signature pens. Pen used to be used, but now it is gradually replaced by black gel pen. Therefore, all such pens are collectively referred to as signature pens.
Water-based pens are generally used on paper, and can be easily erased when used on a whiteboard or a sample. Oily pens are generally used to sign samples or other permanent marks. Oily pens are difficult to wipe, but they can be cleaned with alcohol and other substances.
Gel pen has the advantages of both pen and oil pen. Comfortable writing, low ink viscosity and easy lubrication. The viscosity of writing medium is between water and oil, so it is smoother than ordinary oil pen. It is an upgraded product of petroleum ballpoint pen. The size of neutral nib can be roughly divided into 1.0mm and 0.5 mm. ..
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Matters needing attention in purchasing black signature pens and black gel pens:
1, black gel pens and cores have industry standards, but there is no national standard for the time being, but the industry standards are stricter than the national standards. Due to the immaturity of technology and production process, ink is easy to coagulate, coarsen and crystallize. Many manufacturers don't know how to work hard, especially the stylus with 0.5mm or 0.38 mm label. Most products can't be written after 3-5 months.
2. The pens of black signature pens are mostly plastic. The cover for fixing the refill of inferior products is easy to slide off. The pen clasp is not in contact with the pen cover, nor is it bonded with glue. Contact with the tension of plastic itself, easy to fall off.
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