Wool

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Carbon, hydrogen, nitrogen, oxygen, and sulfur are typical components of proteins, including amino acids such as the sulfur-containing cystine.

1. Challenges when cleaning wool arise from its alkalinity.
2. The fiber's pH should be measured directly from its face yarn with a flat-surface pH meter.
3. The fiber's pH is between 6.1 and 6.7.
4. Wool can experience a degradation known as felting if it is cleaned with unbuffered alkalines.

1. Acid-dyed wool will have a pH between 2.5 and 5.5, but it has been known to bleed with buffered detergents, even with a pH of 6.5.
2. If it has never been cleaned before, the colorants are probably the natural color of the animal.
3. The manufacturer's instructions will likely allow for only dry compound extraction or dry foam extraction.