Pysanki have been made in Eastern Europe for centuries. There is some evidence of decorated eggs being placed in prehistoric burial sites. In pagan times the designs were meant to ensure prosperity for the household and farm. After the arrival of Christianity, the custom of decorating eggs persisted, with new designs and motifs in Christian themes. Either white or brown eggs may be used to make Pysanki. Brown eggs give a deeper tint to the dye, but often have dark spots of pigment on the shell, which can show up in the final designs. Some Pysanki makers say that duck and goose eggs have a higher fat content in the shell than chicken eggs and do not take wax or dye well. Most designs are geometric, using straight lines to make triangles and squares, or curved lines to make circles and spirals. Stylized plants and animals are often used as well. Beewax must be used in making Pysanki. Paraffin, an inorganic wax, does not bond well to egg shells and this makes gaps in the design lines. The colors used include white, yellow, green, orange, red, blue, purple, and black. The earliest Pysanki used dyes obtained from natural sources. Aniline dyes are more often used today, in order to get deep consistent color. Aniline dyes are not food safe so eggs exposed to them must not be eaten. The egg may be blown out and used in cooking before dying, or blown out afterward and thrown away. It is possible, although difficult, to dry eggs whole, but if the egg inside spoils the Pysanka is ruined and most people prefer to remove the egg inside. Wax is applied to the egg shell to cover an area, and then the egg is dyed. Dye cannot reach the areas under the wax so they stay the original color. After the egg is dried, wax is applied over the dyed areas, and the egg is dyed again in a darker color. In this way, multiple colors are obtained. After the last dye step, usually black, the egg is dried and then the wax is melted off so all the colors appear. Ukrainian Pysanki are made using a kitska, a small metal funnel attached to a handle. The funnel is filled with wax, then heated over a candle to melt the wax, which comes out the point of the funnel. The kistka is used to draw lines on the egg shell. Electric kistka are also available which do not need a candle flame and hold more wax. This style produces long straight lines, and different sizes of kistka can make broad, narrower, or very fine lines. Ruthenian Pysanki use a stylus with a metal point inserted in a handle. The point is dipped in melted wax and touched to the egg shell, then drawn quickly along to stretch the round drop of wax into a teardrop shape before it solidifies. The designs do not include as many geometric motifs and are well suited to curved and floral patterns.