A tool often used in the mixing and application of small and precise amounts of liquids, such as dyes. An eyedropper can be useful in floating oil colors on water in the marbling of paper. Eyedroppers are very inexpensive, and can be readily obtained from phamacies ? called chemists in many countries. Glass eye droppers are generally preferable to plastic ones unless safety is an issue.In manipulating digital images, an eyedropper tool is used to sample a color that needs to be referenced. Typically a color look-up table (CLUT) will show you which color you have selected, and how it relates to other colors in the the palette.Also see marbling, solvent, stain, stain removal, and water-soluble.