Original Message
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"RE: HELP! with adding pigment to vp" Posted by holdenmt on 18-Jul-05 at 02:24 PM
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>>THanks so much for the reply. Well, here's the >>added difficulty. I want to stick to >>non-manufactured pigments, so the question >>becomes, can you think of a way to get to the >>nice terracotta using the ochres and natural >>reds, etc.? > >Those are the only ones that you can use >(ochres, red oxides, mars, etc...) > >what do you mean non-manufactured? > >You need ONLY (lime in the plaster will "eat" >(destroy) any synthetic or organic pigments) >natural earth/minerals and those Mitch are >refers to and those are the only ones to use... >You dont have to grind rocks yourself... >unless you find a clean and pure deposit of a >certain mineral, then you better put a factory >there Thanks again so much for the reply. Sorry, my mistake on the pigments. What I meant was that I wanted to use only the ochres & natural earth pigments, so the mars reds and yellows are out. I think I may have given up on achieving the depth I want with just VP, though, and am now thinking about using a glaze over the vp. I tried a traditional turpentine/linseed oil glaze but it of course sank right into the vp - BUT this may be bc I didnt let it cure; i.e. I applied the oil wet, and the VP drank it up like someone in the desert. I am thinking about how I could EITHER use two coats of VP; i.e. yellow undercoat, red on top, and then sand back the first, OR a yellow ochre coat of VP with a red glaze. Any comments on any of this? Oh, as a final touch, I saw in Kevin McCloud's book a nice top coat of a white wash meant to simulate the "saltiness" that terracotta gets. I would be thrilled to able to achieve the yellow/red/white undulation. I think it would be georgeous, and I know there's a way to do it, but I'm unsure about the mixed media. Thanks...Maria
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