消費者購買產品的動機不再只是一種基本需求，一件感質的產品須能提供更高的附加價值，同時有更多的延伸意義於購買時產生，這些意義會觸動內心的喜悅且產生情感共鳴。購買的訴求不再僅是依循外觀的美觀，還須賦予生活的感性、感動和感質，透過設計手法的轉化，使產品擁有形制意義、使用意義與精神價值。本研究以袋包為例，探討以隱性手法轉化設計素材為成質產品之創作研究，並進一步探討如何避免只為裝飾的圖像（素材）運用。結果發現，隱性手法包含了視覺本能的隱性手法、行為機能的隱性手法與精神內省的隱性手法，以上在隱性範疇的討論下，更能表現由隱性手法所呈現出的感質性，跳脫僅為圖像貼附的運用手法。

A qualia product design must provide the added value for consumers. The motive for the purchase of a product is no longer considered a necessity by consumers, the whole feeling of purchasing is greater than an necessity buying. Thus, the value carries an expanded meaning to transform the purchase into an abundant and emotional resonance. For developing guidelines for transformation of implicit expressions into qualia products, and contributes to our understanding of qualia product and the effects of implicit expressions in design practices, the aim of this research avoided to manipulate a source material as figure-pasting based on the three categories of implicit expressions. Finally, a new bag design based on implicit expressions was proposed, and involved with more metaphorical meaning.