Painting media can be classified according to their transparency and opacity of their pigments; opaque or solid colors are the first category which can completely hide what is behind the paint and they are able to cover up an underlying layer. In addition, opaque colors are thickest paints and easiest to control, so the artist can create forms or textures easily. For instance, oil colors belongs to this category when once applied to a canvas or board, it takes time to dry so it gives artist flexibility to start a painting and then come back to it the next day and continue the painting. The paint on the pallet will still be wet and pliable; also the colors on the canvas can still be blended together. At times, the artist might even remove, change or modify an entire layer of paint with ease if the artist makes a mistake. In brief, opaque colors are cover up colors, so it’s easy to work with them.
Secondly, transparent colors are classified as pains that are clear, and weightless. When brushed this category’s color over the other layers, allow the layer underneath to shine through. In addition, transparent colors are thin paint and it’s difficult to use and control, so the artist has to paint quickly before color dry. For example, water color belongs to this category and usually painted on paper. Painting with watercolor is somewhat difficult to use, because it dry immediately as applied on paper and the paint changes form as it dries. Unlike oil color, once artist starts to paint, it must be continued to finish it also the amount of color and water must be controlled by artist all the time. In other hand, an artist needs to minimize the chance of error, because watercolor paints don’t have hiding power, so the previous effort cannot simply be painted over. In conclusion, working with transparent color is difficult because they dry quickly.
Finally, semi-transparent colors are classified as paints that have similarity with