Tip: You can use Faded Polaroid to save another item ;) : r/thebindingofisaac
Faded Polaroid item pool? : r/bindingofisaac
I got both The Polaroid and The Negative by using Diplopia. : r/bindingofisaac
The Binding of Isaac: Repentance |OT| One last run into the unknown depths below OT | Page 28 | ResetEra
Steam Workshop::Polaroid Negative Rework
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Steam Workshop::the polaroid (and the negative) but awesome
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The Polaroid - Binding of Isaac: Rebirth Wiki
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The Best Binding of Isaac Seeds (Repentance and Afterbirth+) | Blog of Games
Apparently gulping the faded Polaroid makes it unable to open the door in depths which I guess makes sense since you can't put it in the door if you swallowed it :
Category:Trinkets - Binding of Isaac: Rebirth Wiki
The Binding of Isaac: Repentance Tainted Characters Guide | The Binding of Isaac: Repentance
I have found what appears to be a faded version of The Polaroid - as a trinket : r/bindingofisaac
The Binding of Isaac: Repentance - Final Boss Guide
Faded Polaroid Stats : r/bindingofisaac
The 10 Best Trinkets in "The Binding of Isaac: Rebirth" - LevelSkip
"Lazarus hard mode" The Binding of Isaac: Repentance #4 - YouTube
The Binding of Isaac: Repentance Tainted Characters Guide | The Binding of Isaac: Repentance
Faded Polaroid - Binding of Isaac: Rebirth Wiki
The 10 Best Trinkets in "The Binding of Isaac: Rebirth" - LevelSkip