Why are some frames drawn on pink/red paper? Do they signify anything in particular?

ftg said:
Why are some frames drawn on pink/red paper? Do they signify anything in particular?

Those are the corrected key frames drawn by the animation director. Typically they draw those on yellow or pink paper if the originals are white.

Someone can correct me, but each colour indicates what level of AD has corrected it. It differs but generally yellow is one layer up, then pink is a senior AD and green is a chief AD.

I think the colors of correction sheets differ from studio to studio.
http://imgur.com/a/BXvhc
At kyoani,
Pink = episode director
Yellow = animation director
Deep yellow = chief animation director

A co-worker who used to work at Studio Pierrot once told me that corrections were done by the episode director, animation director, and character designer

khwan said:
I think the colors of correction sheets differ from studio to studio.
http://imgur.com/a/BXvhc
At kyoani,
Pink = episode director
Yellow = animation director
Deep yellow = chief animation director

Yep, many examples http://i.imgur.com/zZOsmbV.png

Green seems to be the most common for Chief ADs, but there's still many exceptions. YAS is using light blue sheets for corrections as Gundam Origin's designer now.

Forgive me if this sounds stupid, but what is the thought-process behind using a completely different colour paper instead of a simple mark? Is it purely to make the corrected frame (and who did it) that much more obvious when flipping?

TheManyMadMasks said:
Forgive me if this sounds stupid, but what is the thought-process behind using a completely different colour paper instead of a simple mark? Is it purely to make the corrected frame (and who did it) that much more obvious when flipping?

Well this is months late but the reason is that the whoever is correcting it will literally lay their paper overtop the original. Frequently the AD doesn't make major changes, more often its making sure costumes are drawn correctly or that the eyes are pitch perfect. Then in the compositing process the two drawings are merged and you have the final key animation.