A rollerball pen is a type of writing instrument that uses a small, rolling ball bearing in the tip to distribute ink as it is written. The ink in a rollerball pen is water-based and flows more freely than the ink in a traditional ballpoint pen. This allows for a smoother writing experience, with le...

Water soluble crayons are a very versatile art medium. They can be used on a variety of surfaces, including paper, drafting film, fabric, and wallpaper. Unlike traditional wax-based crayons, water soluble crayons are also easily washable from fabrics, paint, and even upholstery. The compositions of...

The propelling pencil is a mechanical writing instrument with a thin, cylindrical sleeve.  This pencil is used by professional artists for drafting and sketching.  They also have a slim design that is comfortable to hold. A mechanical pencil uses a complicated mechanism that has been tested for yea...

1. First prepare a piece of toothpaste and a towel, wet the towel first, and then put the towel into a basin of water. Wet the towel and wring it out slightly. Squeeze the toothpaste onto the wet towel. The amount of toothpaste can be controlled according to the crayon marks to prevent unnecessary w...