Glazing techniques painting. Glazes are semi-transparent paints that allow the underlying base color to show through. They have become increasingly popular because they can be used to create a Whole range of different effects and are relatively easy to use. With a little practice, you will find that you are able to emulate the look that a professional painter can achieve.
Decorative finishes for walls, from simple rag-rolling to more complex crackle glazing, can be undertaken successfully on correctly prepared wall surfaces. It is always a good idea to experiment on a spare piece of board first. It will prove a lot easier to throw out a scrap piece of board if you don’t like the color or the effect, than to redo an entire wall or room.
Preparation of Glazing techniques painting :
Whether your intended finish is based on oil or water, a correctly prepared surface is essential. Since several popular effects are common to both oil and water bases, you do have a choice. However, oils are easier to work with because they dry more slowly and are much more resilient. Water bases dry quickly, which is helpful only if you are attempting a multi-layered buildup of colors. To achieve the same longevity as oils, water-based surface requires several coats of varnish.
Rectify any wall defects, cracks, crevices and holes, as you would for a straight emulsion roller job. For an oil-based finish on bare plaster, prime the surface with all purpose oil-based primer-sealer. For water-based finishes you can use water based primers or PVA thinned With water. Sand the surface of previously painted plaster walls to provide the necessary ‘key’, using a medium grit abrasive paper. Now apply the underlying coats that will partly show through your glaze. One or two coats of oil-based eggshell will suffice for oil finishes; one or two coats of water-based undercoat or emulsion for water-based finishes. If you want a second coat, you can lightly abrade the surface of the first coat using fine-grade abrasive paper.
Choosing and making glazes :
Most finishes require oil based glazes. A slow drying time allows you to handle the medium easily, even when you are attempting more ambitious effects. Water-based glazes are thinner and dry very quickly. Color washing and sponging techniques aside, water-based glazes are unsuitable for most finishes. Water-based glazes are simply made up from colored acrylics thinned with water, or a water-based emulsion glaze, often with the addition of white emulsion to tint the color.
However, oil-based glazes consist of scumble glaze, available from good paint retailers, which can be diluted with a mixture of linseed oil and white spirit, or it can be diluted using turpentine. In both cases more scumble in the mix slows down the drying process, and allows more time for playing with the effects.
You need to start with a basic ratio of 50:50 if you are mixing scumble glaze with turpentine, adding more turpentine to thin down the mix, and the Finished glaze, if preferred. If you decide to use linseed oil and White spirit instead of turpentine, you will find that more white spirit will thin the glaze and shorten the drying time. Increasing the amount of linseed oil will result a smoother, oilier finish. The exact proportions are a matter of personal preference, and you may need to experiment a little before starting the job.
If you are happy with the consistency of the glaze, add the color of your choice, making sure you add just a little at a time. Any oil-based color can be used, but remember to mix specialist artists oil paints carefully with a small amount of glaze to start with.
This will show you Whether the color is what you expect, and it will also prevent the problem of the mix becoming lumpy.
Photographs in magazines and books may appear to show exactly the effect that you want, but you should bear in mind that these are reproduced by a four-color process that is not necessarily an exact color match, particularly where metallic are concerned.
You Will Need :
- Paint for base coat
- Abrasive fine grade paper
- Water or oil-based glaze
- Dilute (Linseed oil and white spirit or turpentine )
- Oil-based color
Step of Special effects of painting Glazes :
- Step One: Apply your base coat to the wall in the normal manner, using long sweeping strokes.
- Step Two: Abrade the surface of the wall between coats with fine grade glass paper.
- Step Three: Blend a little color with turpentine and mix it into the glaze, avoiding lumps of color.