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.
Drying Shrinkage. Introduction. Drying shrinkage is defined as the contracting of a hardened concrete mixture due to the loss of capillary water. This shrinkage causes an increase in tensile stress, which may lead to cracking, internal warping, and external deflection, before the concrete is subjected to any kind of loading.