Both of these hair colors are mixed 2:1 or two parts developer to one part hair color. 4) The higher the number (or level) designated to the color, the greater its' lightening ability. 5) When mixing 2 colors at different levels, the higher level color will lighten while the lower level will add depth-helping to avoid brassiness. 6) When mixing 2 hair colors together, a simple mathematical formula to determine your resulting hair color level is: Add your natural hair color level to the level of the hair color you are using. For example: your natural level is a 5 (dark brown). 9 is the level of the hair color you are using. ( Level 5 + level 9) = 14. Then divide the sum total of the 2 levels (14) by 2. 14 divided by 2=7.
retighten (third-person singular simple present retightens, present participle retightening, simple past and past participle retightened) to tighten again.
It then circulates through the pump and back to the inlet side of the unloader valve. Water is once again either released via the spray gun, or redirected to the pump. The process of continued re-cycling of water through the pump is called âcycling.â. â 1 Trapped Pressureâ unloader valves are the most commonly used. âFlow Actuatedâ unloader valves respond to the interruption of water flow to the nozzle. 2  These valves sense any decrease in flow from the valve to the spray gun and initiate the bypass loop in response. 3  Unlike Trapped Pressure valves, no pressure is trapped, so no âkick backâ occurs when water is re-released.