Traditional pencils with different softness and hardness and different shades have the same appearance, but there is a simple identification of the model in some parts, and you need to pay attention to it every time you use it. The new series of pencils, in addition to the difference in appearance, can clearly perceive the soft and hard properties of the pencil in the holding experience of the pencil. Let the user's grip experience be consistent with the actual writing effect of the pencil.
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However, the charcoal pen will be more direct. There are too many pencils with B numbers, which makes it a little more intuitive than the hard shape shaking.
Looking at your design instructions, I feel that you have read semiotics.