Not only do the blades need to be sharp, but they should be easy and comfortable to handle. A pair of hair cutting shears that either have a tension that is too loose or too tight can negatively affect the scissors proper handling and cutting ability.
Too little tension in the scissors can lead to damaged blades and additional stress on the hands. Loose tension scissors will yield a poor haircut as it will bend, not cut, strands of hair. When hair cutting shears become dull, it is important to have them sharpened and serviced by a professional shear sharpener or sharpening company.
Professional sharpening will mean the hair cutting shears will be sharpened properly, using tools and techniques that won’t damage the scissors