  Although the terms ocean and sea are often used interchangeably, a sea is generally considered to be smaller than an ocean. One definition of ocean is: a great bod â¦ y of interconnecting salt water that covers 71 percent of the Earth's surface.
Sharpie brand permanent markers. A permanent marker or indelible marker is a type of marker pen that is used to create permanent writing on an object. In general, the ink comprises a main carrier solvent, a glyceride, a pyrrolidone, a resin and a colorant, making it waterproof.
The idea is to use DykemÂ® machinist's layout fluid in place of the Sharpie marker on the surface of the optical component. Dykem is a very thin paint or dye that machinists brush onto metal parts to allow them to draw on the metal with any sharp scribing tool. They scribe the layout of cutting and drilling locations (& etc.) directly onto a metal part before machining.