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The Chemistry of Color

The CC Chemistry of Color We see color everywhere - in our clothes, fabrics, walls, cars, flatware, you name it. Do you ever wonder how these colors came to be, how we get such a large spectrum of color? There is definitely a science to producing and apply the right types of inks. Read on to find out what makes our world so colorful.. What Is Ink? PURPOSE: To color a surface! COmmon INK CLASSES: APPLICATION: Pe Pr Aqueous Liquid Paste Powder Pen Quill Brush CONSISTENCY: Lr LP Pe Lithographic Printing Letterpress FACT: Over 90% of inks 90%+ are printing inks Liquid Paste Common components SUn COLORANTS: The components affect the flow, thickness, and the appearance once dry. Colorants are added to ink to change its color and can be a pigment or a dye. COLORANT FACTS: o Colorants are colored because of the absorption of light frequencies. O Colors absorbed are not seen, as we only see the colors bouncing back to the eye. VEHICLE / BINDER FACT The green of a leaf absorbs the blue and red of a spectrum but reflects the green The ink vehicle is the fluid part of the ink that transports the pigment or color to the surface the ink is adhering too. COLORANTS: PIGMENTED INKS O A dry colorant, usually ground into a powder (•) that is suspended in ink to provide color. o Can color things like paint, ink, fabric, cosmetics, food, etc. O Example In India, Hindus celebrate using brightly colored powders made from flower extracts, ash, and water at the Holi Festival. COLORANTS: DYE-BASED INKS O Stronger than pigments, creating more color density. O Dye-based inks dissolve in liquid. TYPES OF DYE-BASED INKS O Natural: Derived from plants, invertebrates, or minerals. Many stem from plant sources like roots, berries, bark, leaves, wood, fungi, lichens, and vegetables. o Advantages: Simplicity of use and reproduction of the same color, and is environmentally-friendly. O Disadvantages: A large amount of water is needed, and there are questions of permanency. O Example Chart of Colors: Reds: comes from an insect called a Cochineal. Oranges: one-seeded juniper plant.- Yellows: weedy flowery plants like pomegranate rind, onionskins, saffron. Greens: many times yellow is mixed with blue to produce green. Blues: is created from woad (an indigenous plant found in Europe). Purples: usually made from woad and indigo dyes mixed with red (cochineal or madder plant). Brown: wood of acacia trees. Greys/Blacks: Navajo weavers use lupine (blue flower) to mix cool grey and juniper mistletoe for warm grey. O Synthetic: Almost all colors you see today are synthetic dyes. o Origin: Discovered in the late 19th century, and took over the market for natural dyes. o Advantages: Cheap to produce, more permanent than natural dyes, wider color spectrum. O Disadvantages: Highly toxic to manufacture (factory workers have 40% higher risk of developing cancer, lung disease, and cerebrovascular disease than the general population), harmful to environment. o Application: Textiles, medicines, chemistry, plastics, printing ink, rubber, cosmetics, etc. cOmmon COMPONENTS: ADDITIVES Additional ingredients that alter the physical properties of ink that vary depending on the situation. O Some inks contain: D) Defoamers: reduce surface tension in water based inks PL) Plasticizers: enhance flexibility of printed film Waxes: promote rub resistance (PL) cOmmon COMPONENTS: CARRIER SUBSTANCES Substances added to ink to help transport and prep it for contact with desired surface. Sources: science.howstuffworks.com dyes-pigments.com spring04/ce457_527/Matt.pdf printwiki.org nzic.org.nz rsc.org academia.edu ccmr.cornell.edu greencotton.wordpress.com InkTechnologies.com www.INKTECHNOLOGIES.COM SAVING YOU MONEY WITH EVERY PRINT! TYPES OF DYE-BASED INKS VEHICLE / BINDER

The Chemistry of Color

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With the advancements in printing and graphics have you ever wondered what kind of science and chemistry is behind the creation of your favorite color creations? Now you can indulge your curious and c...

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