以往灰色置換的使用和研究，多在掃描器上做置換，且少有印刷業界實際使用，這幾年灰色置換因為PDF灰色置換軟體的出現有了活路。近幾年有多家報業公司已經開始使用PDF軟體來進行灰色置換，以達到節省油墨成本的需求。本研究則來探討灰色置換現今在台灣報業的使用。先對報業主管最在乎的節墨效果做探討，並預估單一一張全版廣告可節省的成本。另外對台灣報業做訪談，以瞭解灰色置換的使用情形和產生的問題，和對於灰色置換的看法。PDF灰色置換軟體的節墨效果，經測試估計平均節省了24.76%的油墨量，最高的樣本節省了32.6%的油墨量，最少節省了10%的油墨量。預估一個報紙全版廣告可以節省新台幣0.03元上下的成本。訪談得知使用PDF灰色置換軟體，其大部分的印刷檔案都可轉成PDF，相容性和普及性大，且可以跳過廠商LOGO等不想轉換的版面物件，與其他可進行灰色置換的軟體相比是個很大的優勢，更比早期掃描器上做灰色置換來的實用性更佳。
The application and study of gray component replacement are much more used on scanner than printing industry. In recent years, new spaper industry has applied PDF GCR software to save ink cost. This study is discussing the application of gray component replacement in Taiwan newspaper industry. Firstly this study probes into saving ink cost efficiency that bosses most care about. Forecasting the cost single paper full advertising layout can be economized. On the other hand, interviewing Taiwan newspaper industry explore applications, problems and perspectives of gray component replacement. Saving ink cost efficiency of PDF gray component replacement software, after Estimating could save 24.76% ink on average, in which Maximal saving 32.6% and minimum saving 10%. Prognosticating a piece of paper with full advertising layout could save about NTD 0.03. This study discovers that PDF GCR software could skip over objects such as LOGO etc. Which is better than other software and scanner that could execute gray component replacement, and more practicability.
