What is the difference in the 2? I only have Mars… Not carbon! Can I use the Mars? Thank you!!! 
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I’ve only used Mars black
To make carbon add a touch of ultra marine blue… It makes a blacker black! ️
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Carbon black is a bit more black and mars is a little more brown black. That’s what I see when I compare them on the GHS color chart. I think carbon is a deeper black, maybe has more blue in it.
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Your exactly right!!! Thank you!!!
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