There does tend to be residue on follicles after the use of ammonia-free coloring’s larger molecules. They don’t leave that harsh odor. This is because the chemicals don’t evaporate as quickly as their ammonia counterpart. The slower evaporation process makes this type of dye more challenging to rinse.

It’s not unusual for the residue to remain even after thorough washes. There are a few ways to correct this. Use a cotton swab and makeup remover to get rid of residue. Another solution is to apply a creamy or dense remover like cold cream. Some use micellar water, but not everyone finds that effective.

Comparing Ammonia vs. Ammonia-free Hair Color

As the chart below demonstrates, there are benefits and disadvantages to hair color with or without ammonia.

Ammonia or Ammonia-Free Hair Dye: Which One Is Right For You?

Ammonia substitutes will never swell follicles in ways that promise deep penetration. If you’re looking at gray coverage, the treatment can fall short will non-ammonia products. That’s especially true of permanent, non-ammonia applications. Ammonia ensures a nice, rich, darkened result.