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MITRA Forum Question Details

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  • Sinking in of umbersApproveRejectUn-ApproveSubscribeUn-Unsubscribe
    Question asked 2019-08-28 02:11:23 ... Most recent comment 2019-08-28 19:12:52
    Oil Paint


    just read your document on FAQ's etc, in regard to sinking in of the umbers, apparently because of their clay content (PBr7 from natural iron oxide ore).

    (1) I have just noted that W & N make a similar colour, synthetic iron oxide PR101 (transparent brown oxide) which has, apparently, micronised pigment particles which I doubt would contain any organic substances such as the problematic clay referred to above? If I use the latter should I then avoid the sinking in associated with PBr7? (all other things being equal);

    (2) If I use an oil-based primed canvas such as lead white (instead of an acrylic gessoed one) would this stop the sinking in, even if I use PBr7? 

    Many thanks in advance

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