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TRIZ 40 Principles
Creative tools > TRIZ Contradiction Analysis > Principles
31. Use of porous materialsPorous material allow some substances through them and block others, which allows them to be used for separating and filtering out desired or undesirable elements. As with mops, they also can be used for absorbing and collecting liquids or gases, which can subsequently be released in a controlled manner as required. Where porosity is an undesirable effect, then you may want to clog up the pores rather than utilise them. |
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