Remi Engels, Ph.D. asked:


If you paint with oils you will need a solvent to clean your brushes and thin your paints. Of course, if you paint with water soluble oils then your solvent will be water.

Turpentine is a standard solvent used to thin ordinary oil paints. You can purchase turpentine in any art supply store or hardware store. In some cases, the kind of turpentine you buy in a hardware store may be fresher because of the shorter turnaround time.

Some artists work with mineral spirits. These are also available in hardware stores. To save money, buy the largest available quantity and use a smaller container when you do your actual painting.

Tube oil paint (i.e., oil paint directly from the tube) can be difficult to manipulate. Some colors are stiffer than others and may be hard to evenly distribute over your canvas. To solve this problem, artists often need to mix their tube paints with a so-called painting medium.

A painting medium is a liquid solution that makes the oil paint smoother and easier to manipulate. Adding any one of a number of different painting mediums changes the consistency of the paint. Some mediums are meant to make the paint thinner for glazing and others are meant to make the paint thicker for impasto painting. There are also mediums to shorten or lengthen the drying.

 

The most basic medium is regular turpentine. Adding a little turpentine thins oils paint. Another frequently used medium is linseed oil, which makes the paint more fluid but, over time, it also tends to yellow the paint. The most commonly used medium is a combination of turpentine and linseed oil, sometimes with the addition of a little damar varnish.

Begin by experimenting with a half-and-half mixture of turpentine and linseed oil. Because linseed oil slows down the drying process, you may want to increase the proportion of turpentine. A good mixture is three parts of turpentine to one part of linseed oil.

Once you find the medium you like, mix a batch and store it in a tightly sealed jar. As you paint, dip your brush into the medium, then add a little paint, then mix them together on your palette (mixing surface).

Preliminary compositions can be drawn on your canvas with a so-called thin turp wash, i.e., a little bit of paint with a lot of turpentine. A turp wash evaporates very quickly, so you can quickly paint over them.

In general, the more turpentine you use the matter the finish will be and the more linseed oil you use the glossier it will be. If you like robust, permanently visible brushstrokes, you may want to use less medium. Dry brush is one technique where you do not add any medium at all.

Special painting mediums are also available that change the oil paint in different ways. The most common are those that shorten or lengthen the drying time of the oil paint. Check your art supply store or the Internet to see the available types of mediums. All medium bottles will show instructions on how best to use the particular medium.

Oil paintings must be varnished to protect them from undesirable elements such as dirt and toxins. Varnish is a clear solution made from a resin and turpentine or some other solvent.

In art-supply stores you will see two major types, retouching varnish and picture varnish. Depending on the paint layer thickness, it can take six months or more for an oil painting to dry. In the meantime, the surface of the painting needs to be protected with a coat of retouching varnish. After the varnish is applied, the turpentine evaporates, and leaving a thin protective coat. You can apply retouching varnish as soon as the paint feels dry to the touch.

 

Picture varnish contains more resin than retouching varnish. It should be applied about six months after you complete a painting. If you paint with impasto-like brushstrokes, you may have to wait as long as a year before applying the final coat.

 

Both types of varnish are applied in the same manner. Using a broad, flat nylon brush, apply the varnish evenly using horizontal strokes. You can also use retouching varnish to brighten dry dull patches in your painting.

vijay asked:

A Quick Introduction to Oil Painting Models

You will need:

Brushes

Turpentine

Palette

Oil Medium

Paints

Brushes – Good quality sable brushes. Don’t withhold on the quality here. Brushes would last longer with Oil paints than any other medium if you take good care of it.

Modern synthetic brushes could be even more excellent in quality, so don’t restrict your self in choosing only those brushes that are made from natural hairs such as sable. Look for painting brushes where the hairs swiftly spring back up when you bend them. Be careful about cleaning your painting brushes as if acrylic paint dries in a brush, it could be extremely difficult to clean it up.

Turpentine – Turpentine is used for lessening and cleaning brushes.

Palette A palette is a surface on which a painter mixes it colour pigments. A palette might be made of wood, glass, plastic, ceramic tile or even inert material and could vary highly in size and shape. The most usually known type of painter’s palette is made of thin wood board designed to be held in the artist’s hand and rest on the artist’s arm.

Oil Medium – These would speed up the process of drying the paints and also give slight gloss sheen. Turpentine could be used with some of the same effect.

Paints – It is suggested to use “Artist’s” oils. These are the top quality available in any variety with better pigmentation and permanence. Tubes come in different sizes but oils have good covering skill and would even last a long time.

Opacity – Sometimes marked on the tube, opacity shows how transparent the oil is. Red/Yellows are commonly the least opaque.

Permanence – Usually marked on a scale of 1 to 4 (often marked in stars), 4 being most enduring, and (longest lasting).

Hue – Could be exactly described as the Shade of the colour. Can sometimes relate to Opacity

Oil Painting: Making it Simple

Oil painting is simple, far simpler than drawing or even watercolor painting. If you could see something, you could paint it in oils. To create something memorable, however, you need to:

1. Formulate what you hope to attain, and plan a workable way to that objective.

2. Research the market if you desire to sell the work.

3. Approach the painting process in rational steps, which generally entail:

* Drawings to examine compositional possibilities.

* Blockedout charcoal/pencil/oil sketches to place tonal value

* Oil sketches to trial with various color schemes and harmonies.

* Preparing canvas and paint for the probable tasks.

* Varnishing, framing and hanging the work.