Watercolor painting

Cobalt is used as a blue phosphor in cathode ray tubes for television, in the coloration of polymers and leather goods, and as a pigment for oil and watercolor paints. Organic cobalt compounds that are used as colorants usually contain the azo (51) or formazon (52) chromophores. 

Blake, Wendon. Acrylic Watercolor Painting. New York Watson-Guptill, 1972. 

If watercolor paints are in dry cake form, the dry cake must be mixed with water to make a paint. Improper mixture can result in a heterogeneous mixture. When acrylic and poster paints are diluted with water, heterogeneous mixtures can also result. 

Students will observe differences in the appearance of watercolor paint when it is applied to a variety of watercolor papers. 

Variety of watercolor papers, each piece cut to the same size (suggested papers cold press, one medium texture, one rough texture hot press, manila white drawing rice and other available papers) watercolor paint paintbrushes mixing containers water containers water masking tape. 

After the paint dries, compare the results and determine which papers are suitable for watercolor paint. 

Lint from clothes dryers (papier-mache pulp can also be used) kitchen blender transparent or masking tape animal hide glue embroidery hoops thinly woven fabric trays slightly larger than embroidery hoop NaCIO (5% sodium hypochlorite solution bleach) 250 ml beaker red and blue litmus paper watercolor paint prepared in Activity 2.5 commercial watercolor paint paintbrushes mixing trays water containers centigram balance hot plate watch glass. 

Use watercolor paint prepared in Activity 2.5, as well as commercial watercolor paint, to paint pictures on the prepared paper. 

For the consumer, proper care and maintenance can prevent many of the causes of damage. Proper storage and methods of hanging are important. Watercolor paintings and other works on paper, for instance, should be matted and framed behind glass to protect them. Acid-free mat board should be used. Special glass that filters out harmful light rays that may fade the work is also recommended. Many articles and books about the care and maintenance of art of all types are available (see References in this chapter). 

Dianne Patterson is a retired art teacher in Elmhurst, Illinois. She is past chairperson for the art department at Willowbrook High School in Illinois and is currently associated with the Elmhurst Art Museum as a docent and lecturer. Dianne is a former member of the Illinois Alliance for the Arts, Chicago Art Education, and the Illinois Art Education Association. She is currently pursuing watercolor painting, creation of wearable art, writing, and travel. Dianne received her bachelor of fine arts (art education) from the University of Illinois, and her master of arts from the University of Illinois. She has pursued postgraduate work in fine arts and art education at the University of Wisconsin, University of Colorado, and Northern Illinois University. 

The components assembled at Winterthur in 1970 to make up the energy dispersive x-ray fluorescence analyzer system employed in this study of trace elements in paper, documents, prints, and watercolor paintings were Kevex Series 3000P cryogenic system and detector (sample viewing diameter, 15 mm detector resolution, 170 eV at 5.9 keV... 

A large group of watercolor paintings made by Pennsylvania Germans in the early nineteenth century was compared with cakes from paint boxes of the period by Janice Carlson and John Krill of Winterthur (3), revealing the brand of colors used by some of the artists and dispelling the myth that these primitive artists made their own colors. 

V2 X 11-inch sheets white watercolor paper, sketchpad paper, or thick construction paper Paintbrush, 1 inch or wider Set of watercolor paints in assorted colors, or you can use regular paints with a lot of water 1 cup water... 

Large screwdriver 1 piece twine, 12 inches Enough seashells to cover the foam board Watercolor paints, or box of crayons in browns, reds, oranges, greens, and blues (can substitute Nature s Paints, see page 70, or cornstarch paint, p.xv)... 

Figure 51 shows a nineteenth-century Japanese fan (in black and white rather than the actual color) decorated with a watercolor painting of the phoenix. The figure bears a striking resemblance to a twentieth-century cultural icon—Rodan, the subject of a modern Japanese film genre that 1 will dub Plos-tique Monstresque. Indeed, Rodan rises from the ashes of nuclear tests to menace the earth and teach us all a good lesson. It is a phoenix born on the funeral pyre of the atomic bomb. 

These watercolor paintings by Dee Molenaar were originally published in 1985 with his map of the McMurdo Sound area of Antarctica. We are pleased to republish these paintings with the permission of the artist who owns the copyright. 

Designers color n. Opaque watercolor paints that dry flat and are not necessarily permanent. 

Mastic and sandarac, which are soluble in alcohol, were formerly used as varnishes, particularly in the Middle Ages, for the protection of oil and watercolor paintings or for coating metals. Sandarac is the resinous exudate of Tetraclinis ar-ticulata (Cupressaceae) and mastic is obtained from Pistacia lentiscus var. chia (Pistaciaceae). Mastic is still collected on the island of Chios in the Aegean it was once the monopoly of Greek emperors. Its use to sweeten the breath and for dental purposes was first recorded in 400 B.C. (19). 

Gums are usually defined as polysaccharides of natural origin—they are often used in the food industry as thickening agents (vide infra), but gum arabic, the hardened sap of acacia trees, was long used as an adhesive for stamps and also as a food stabilizer and a binder in watercolor paints and in lithography. It is a mixture of polysaccharides and glycoproteins, the... 

---