How do I adjust the tension on my scissors & how do I know if the tension is correct?

The right tension is part of scissor care: A scissor that is too tense or tight will not only cause the scissor to wear down faster, causing it to go blunt faster and shorten its life, but will cause fatigue for you also due to the extra effort required to use the scissor. However a scissor that is too loose tends to 'fold' the hair rather than cut it, making a perfectly sharp scissor feel like it's blunt when it isn't. To test the tension: Lift one of the blades to a 90-degree angle and let it drop. If the tension is correct, the blade should only fall to around the ⅔ closed position.