Aug 11 2021 67 mins
黑白負片顯影液功能項目：
1、顯影主劑
2、抗氧化劑(防腐劑)
3、鹼劑(顯影促進劑)
4、灰霧抑制劑
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S4EP8 黑白負片顯影液的成分與自己調制顯影液的心得分享
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