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Background and transparency in my PNG files?

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Hello everyone


Years ago, i made som pictures in MS Paint and saved them as PNG.


I was now wondering, if the pictures have a background or any transparency.


The files are bit depth 24.

They do not have any tRNS chunks.

They do not have any bKGD chunks.


I used the TweakPNG tool to view the file chunks.


So it is safe to say, that my pictures do not have any background or transparency?


Is there other indicators, for if the pictures have transparency or a background?


Thanks in advance for answering


Best regards


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