contingent. 1  dependent for existence, occurrence, character, etc., on something not yet certain; conditional (often followed by on or upon): Our plans are contingent on the weather. 2  liable to happen or not; uncertain; possible: They had to plan for contingent expenses.
Get a brush. Face masks are best applied with a soft-bristle brush, such as a paintbrush (normally used for art making) or a tint brush (normally used to apply hair dye). Invest in a brush that you will use for this purpose, and be sure to clean it when you are done.
You can use alum in face masks and scrubs. To use, powder the alum finely, mix it in the liquid used in the face mask and then mix the liquid and dry ingredients. But don't add too much of alum powder, usually 1/8 tsp will work well.