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- 20:32, 8 June 2026 JesseCrooks talk contribs created page User talk:JesseCrooks (Created page with ""It's important to note that this recommended practice was issued at a time when cellulose acetate was the reigning film base for release prints, which has very different physical characteristics to polyester release prints, which is the standard today. Since the same experiments that led to RP 39-1970 have not yet been conducted on polyester release prints, the recommended practice is arguably outdated in terms of establishing a universal standard, although remains just...")