Soy ink has been proven to spread around 15% farther, lowering ink use and printer cleaning costs. Newspapers frequently utilize soy ink, particularly for color, since it produces a crisper and brighter picture. Color newspaper inks are also more cost effective than petroleum-based inks. Soybeans are converted into oil or protein products such as tofu, milk, and meat. Newspaper printers use soybean oil for its quality and durability. The oil is mixed with water and solid particles of calcium sulfate. This mixture flows through the print head where tiny drops of oil break away from the larger mass and are deposited on the paper. As the ink dries, each drop solidifies into a hard ball that provides clear printing on a white background. Newspaper editors prefer soy ink because it produces a less yellowed print and is easier to recycle. Soy beans are processed into oil or protein products such as tofu and milk. Thus, using soy ink results in fewer garbage disposal problems than other types of ink. The main ingredient in most vegetable dyes is carotene. This natural pigment comes from plants and can vary depending on how the dye was produced. For example, beta-carotene is found in yellow vegetables like carrots and pumpkins, while alpha-carotene is present in red peppers and tomatoes.