The original idea for Alda came from exploring an alternative approach to generating different typeface weights by adapting the characteristics of physical objects. Hasebe was interested to find out how far this could be pushed before the letters became a parody of what they referenced. Initially he took this treatment very literally, with the boldest weight expressing the tension of bent steel, and the lightest being as spineless as a rubber band. This allowed him to infuse each weight with unique characteristics, where the bold is robust and angular, and the light is delicate and soft.
For more information about Alda, download the free type specimen.