The wet brush technique, is a direct wet on wet paint, brushstroke over brushstroke, varying many times, the size of the brush, continuously dabbing little touches to cover lightly with or as if with a moist paint and frequently changing the color values and intensity.
Dry brush is a painting technique in which a paint brush that is relatively dry, but still holds paint, is used. Load is applied to a dry support such as paper or primed canvas. The resulting brush strokes have a characteristic scratchy look that lacks the smooth appearance that washes or blended paint commonly have.
Painting is the application of pigments to a support surface that establishes an image, design or decoration. In art the term “painting” describes both the act and the result. Most painting is created with pigment in liquid form and applied with a brush.
The first way to categories' paint brushes is by the type of hair they use. The two main types of hair are bristle and sable. Both come in many different shapes and sizes, and can be made either from natural animal hair or synthetic fibbers. Generally use bristles for rougher marks and sables for smoother strokes.
Bristle brushes are made of thicker, stronger and sometimes rougher hair. They originally came from animals such as wild hogs, but now synthetic bristle brushes are very common. Bristles are great because they can hold a lot of paint. I use bristles to do the bulk of my painting, especially when covering large areas.
To help you choose which paint brush to use, here is an example of some marks made with bristle brushes. Bristle marks tend to be rougher and the paint strokes can be easily seen. These are often called "painterly" strokes. I like the rough look for adding texture and variety to my paintings. I also like bristles for making drawing type marks because of their stiffness and durability.
Sable brushes are generally made of finer and softer hair. Sables can be made from soft animal hair such as a mongoose or mink, or from soft synthetic fibers. I like sables mostly for blending edges and creating softer and more subtle marks. I also enjoy using smaller sables for adding fine details and finishing touches.
Here is an example of some marks made by sable brushes. Sables make very clean marks and the paint strokes tend to be hidden. Because of this sables are great for achieving a more "realistic" look in a painting. I like to use sables for making soft, airbrush like marks and for blending.
The next way I categorize paint brushes is by shape. The three most common shapes are: flat (A), filbert (B) and round (C ). All three shapes can come in both bristle and sable hair. They also come in many different sizes. It took me years of practice and experience to decide which shape worked best for me.
The next common brush shape is flat. Flat brushes have a rectangular shape. Flat brushes make square shaped marks. They can also make chisel like lines, especially when using a sable flat. I use flats mostly to model form. There square shaped marks are great for defining planes and form in a figure or portrait painting.
The first common brush shape is round. Round brushes are shaped like sharp tear drops or large needles. I like to use rounds for drawing and making drawing like marks. I'll often begin my paintings with a small round brush to draw with, and then use larger rounds to fill larger areas.
The final most common brush shape is filbert. Filberts are combination of both round and flat. The have the rectangular shape of a flat brush, but also come to a point like a round brush. Because of their unique shape, filberts can create a wide variety of marks. I use filberts for many painting tasks including blending edges.
Larger brushes are almost always flat shaped and made from bristle since bristle holds more paint. Large brushes like these (A) come in 1/2 inch to 1 inch in size. The large long handle flat (B) is a size 12. I use large brushes for painting large areas, but also for applying gesso and varnish
Once you know which paint brush to use and when, start building up your collection. This is my personal brush set for painting indoor subjects like figures and portraits. For brushes that do most of the work, I have two of each size. I also work mostly in bristle, using small sables for detail and blending.
For painting outdoors and landscapes, I've settled on this set of brushes. I do most of the work with bristle flats so I carry two of each size. I have a small round for drawing and a large round for large areas. The small round sables are for adding details and finishing touches.
Still struggling with which paint brush to use? If I was on a tight budget and could only use two or three brushes, these are the brushes I would use. A size 4-6 flat (A) will accomplish many painting tasks and a size 2-3 round (B) will complement the flat well. I would also add a slightly larger 6-8 flat (C) for covering larger areas quickly