Take our 100 x 100 pixel image again. Suppose it's set at 100 PPI (producing the same 1 x 1 printed image). With re-sampling off, when you adjust the PPI the dimensions adjust as well, this is how things worked in the example above. With re-sampling on, the dimensions won't change.
To dispose of charcoal and wood ash: Let the ash cool for 48 hours. You can speed up this process by pouring water over the hot charcoal and stirring it very carefully. When the ash has cooled completely, wrap it in aluminum foil and place it in an noncombustible outdoor trash bin.
Rinse your face and neck and pat dry. Apply the mask to your face and neck in a thin, even layer. Let it dry for 10 to 15 minutes. Rinse your face well with warm water. Any leftover mask can be stored in the refrigerator for up to five days. Activated charcoal can be purchased at most health food stores and at some drug stores.