Chalk flour is suitable for the production of paints and putty and as a filler for paints. If the paint feels too thin, you can thicken it by adding chalk flour.
SUITABILITY OF CHALK FLOUR
Lightfastness: Good
Water-based binders: Good
Oil-based binders: Good
Lime and cement: Not recommended
THE USE OF PIGMENTS FOR COLORING THE PAINT
When tinting water-based paints, the pigment should first be mixed with a small amount of water, resulting in a so-called toning paste.
The pigment is mixed with water so that the paste becomes smooth and quite thick. The finished paste is added to the paint until it is the desired shade.
The proportion of pigment should not be more than 10% in the finished paint, because too much addition of pigment weakens the paint's ability to stick to its substrate and the paint may stain even when dry.
So you cannot get very dark shades from white paint. The binder content of different paints varies, so the tinting is always specific to the paint.
In tinting oil paints, the principle is the same as in tinting water-based paints, but the pigment is first mixed with either turpentine or boiled linseed oil (in varnish).
General instruction
OIL PAINT MADE BY YOURSELF FROM PIGMENTS FOR INTERIOR USE (approx. 1 liter)
Self-made oil paint is suitable for restoring furniture and making oil glaze. By changing the amount of pigments, the coverage of the paint can be affected.
5 dl boiled linseed oil
1 dl general thinner
about 500-700g of pigment, depending on the color
0.5 dl of serotonin
The ingredients are measured in e.g. a three-liter container and mixed vigorously with a paint mixer attached to the drill for approx. 15 – 60 min, depending on the roughness of the pigments. Finally, the paint can be filtered, so that the insoluble lumps of pigment are left out. If the paint feels too thin, you can thicken it by adding more chalk flour as needed. Different pigments react differently; some need more oil to dissolve than others. In general, heavy pigments dissolve in a smaller amount of oil than light dusting pigments.
When making small batches, the pigments dissolve in a smaller amount of oil than light dusting pigments. RUBBING THE PIGMENT Rubbing the paint pigment is important in production. The pigments can be finely rubbed with the oil with a pigment grinder or a palette knife on top of the glass. At first, the paint rustles against the substrate. The paint is ready when the mixture is smooth. Rub only a little paint at a time. Add more oil to the paste and the paint is ready. The paint is applied in thin layers 2-5 times. The surface is allowed to dry between layers for 2-5 days.
