塗膜在乾燥過程中，常會有捲曲現象的產生，而造成捲曲現象的主要原因是因為在乾燥過程中塗料因為乾燥時體積的收縮產生的應力所致。應力的產生不單單由一個變因或一個物性決定，往往是很多因素在製程條件的改變下所造成的應力形成與應力釋放間決定了應力的大小。
會造成應力的形成與釋放是因為有厚度、黏度、反應時間種種原因。本實驗探討兩種應用相當廣的塗料聚亞醯胺(polyimide,PI)與聚乙烯醇(polyvinyl alcohol,PVA)在不同製程條件下例如:溫度、厚度、環境溼度、基材厚度等等不同因素下對於塗膜乾燥捲曲的影響，進而去找出影響捲曲最敏感的條件。此外並以製成條件來推論出可能的捲曲高度，如此一來就可以避開捲曲對其他性質的影響。在理論方面探討了在塗膜時塗料因為體積收縮產生了應力並可以從製程條件去推出應力形成 ，在另一方面，加上可以從應力去推出捲曲高度的理論 ，兩者相配合 即可從製程條件直接推算出捲曲高度。

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