A 1:1.5 mixing ratio for hair color refers to the proportion of color to developer. For every one part color, 1.5 parts developer are used. For example, if 30 grams of color are used, 45 grams of developer (30 x 1.5) are required. This specific ratio is common for achieving certain lightening or depositing effects with many professional hair color products. Understanding the ratio and using precise measurements ensures predictable and consistent color results.
Accurate measurement is crucial in hair coloring to achieve the desired shade and avoid unwanted outcomes like uneven color, damage, or brassiness. Using a consistent ratio ensures the color processes correctly and deposits the intended pigment. Historically, hairdressers have relied on precise measurement and ratio-based mixing, highlighting the importance of this fundamental principle in professional hair coloring practices.