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.
If you have leftover dye you can rub it into the area and rinse it immediately. You can make up a concoction of half lemon juice or baking soda to half dishwashing soap. Gently wipe the area with the liquid on a wash cloth. This should remove the stain. You can also try using a make-up removing cream or towel.