I can hear my mother now telling me to invest in a good pair of shoes, or one nice dress, or a fine piece of furniture. Not me, I always put my money into the tools of my craft, my art. A good natural bristle brush is an investment as they are expensive, but worth the money.
Another misnomer is to put your brush in a plastic bag and freeze it between uses. NO! You can certainly bag your brush while you take a break, eat lunch, etc. but never freeze your brush as you are freezing paint into your brush. If you need to leave your project for a while simply bag the whole brush, or wrap the head of the brush in cellophane and rubber band it around the handle. You can even bag a brush over night, but not continuously, everything eventually needs a bath to be at its best.
3. Always condition your natural bristle brushes after washing. Once my brush has been washed I squirt a small amount of inexpensive hair conditioner into my palm and work it into the brush just like I do when I condition my own hair. Rinse with cool water and shape the brush.
Happy Painting!Susan Hudson