Hair treatment compositions, systems, devices and methods

A hair treatment kit comprising:

• a hair treatment composition selected from the group of semi-permanent oxidative and/or direct dye hair colorant compositions, hair bleaching compositions, highlighting compositions, and combinations thereof;
• a reservoir for holding the temporary hair treatment composition;
• and
• an applicator fluidly connected to the reservoir via an air valving system that limits inflow of air into the reservoir for selectively applying the hair treatment composition to a targeted area of hair, where the applicator includes a cap that is removed to open the air valving system.

An applicator device for applying a semi-permanent oxidative and/or direct dye hair colorant composition to a selected area of hair, the applicator device comprising:

• a collapsible body defining a reservoir for holding the hair colorant composition;
• a body head connected to the collapsible body and defining a nozzle in fluid communication with the reservoir;
• an applicator assembly connected to the body head, the applicator assembly comprising:
• a valve body configured to engage the nozzle to selectively permit flow from the reservoir;
• an applicator mechanically attached to the valve body to receive flow from the valve body;
• and
• a holder having an opening through which a portion of the applicator can extend, the holder coupled to the body head;
• and
• a spring located between the body head and the valve body to bias the applicator assembly away from the body head.