The process in this case is âsubtractive,â since the pigments subtract or absorb some of the wavelengths of light. With transparent dyes, like our Fiber Reactive Dyes that we use for Tie-Dye, Cyan (blue-green), Magenta (red-violet), and Yellow and are called subtractive primaries, or primary colors.he process in this case is âsubtractive,â since the pigments subtract or absorb some of the wavelengths of light. With transparent dyes, like our Fiber Reactive Dyes that we use for Tie-Dye, Cyan (blue-green), Magenta (red-violet), and Yellow and are called subtractive primaries, or primary colors.
Preauricular Pit or Sinus. Preauricular pits or sinuses are present in front of the ear. they are small skin lined tracks that lead from the skin surface to deep within the tissues in front of the ear.Their track course can go into the cartilage or end in the skin tissue.
A gastric pit is a shallow indentation in the surface epithelium of the stomach mucosa. These pits, which are lined by a protective epithelium of surface mucous cells, confer a characteristic texture to the entire surface of the stomach. Gastric glands open into the bottoms of the pits.