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Lamp black - issues?ApproveRejectUn-ApproveSubscribeUn-Unsubscribe

Question asked 2018-06-07 03:37:52 ... Most recent comment 2018-06-08 02:47:39
Pigments Oil Paint

Hi all,

I prefer to use Iron Oxide Black (PBk11) for my darkest values as I read that unmixed Lamp Black (PBk6) can have cracking issues due to the very small pigment size and oil absorbing nature. I use it pure for the darkest values and then mixed in with other pigments for the darker colours in my painting.

However I do find Iron Oxide Black dries a bit quick. Would mixing it with Lamp Black be acceptable from an archival point of view so I get a bit more open time? Would the Iron Oxide help the paint film withthe larger particles and less oil rich nature?

I work on rigid panels on a toothy surface with paints made more fluid with walnut oil (no solvents). With this extra oil and lack of movement do you think I would experience any issues with using pure Lamp Black areas? Or would it be safer to use a mix with Iron Oxide Black or Iron Oxide on it's own?

Thank you,
Richard

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Moderator Answer (mkinsey)

[2018-06-07 20:22:17]

​Richard, That sounds like a sensible approach, mixing the two blacks to arrive at something with the properties you want. Personally, I think it's best to avoid painting broad areas with lamp black alone, even on a panel, especially if you're not using a medium that can support film strength, like alkyd. Just as an example, while I don't know for certain which black was used on William Orpen's Portrait of Grace (1907), in this picture there is fairly apparent splitting of the type I think might result from broadly painted lamp black. 

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User Comment

[2018-06-08 02:47:39]

​Thank you Matthew for your help. That makes me less inclined to paint with lamp black alone!

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