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When you need to color, you may feel like donning a gas mask to avoid smelling the strong fumes associated with hair coloring kits. Blame the fumes on the ammonia that hair color contains. The reason for ammonia? For years, it's been there to force hair fibers open so the color will absorb deep into the fibers. Now, with newer technology, many hair color brands are offering products that do not contain ammonia. When you choose one of these ammonia-free hair dyes, disposal is the easiest part of the whole process.
Use all of the mixed-up hair color, if possible. This is the simple solution for hair color disposal -- nothing to throw away.
Remove the cap from the mixing bottle after you finish applying the color.
Place both the bottle and the cap into the garbage can.
Dispose of the garbage with your regular trash.
Never store any mixed hair color in a sealed container because the ingredients can cause the container to burst.
Always make sure that you place the open plastic container into the trash so that any residual hair color ingredients inside the container will not cause the container to burst.