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|Postcard and Envelope|
The postcard from Greg Lindquist's exhibition was given to me by Greg before his exhibition "You are Nature". The pen's body, caps, and plugs are formed from plastic resin. The marker reservoirs are formed from polyester. Powder and water are used to form the felt writing tip. In addition, felt-tipped pens require ink, and the pigments and synthetic substances used to make it. Toluol and xylol are synthetics used as solvents in dye as well as chemicals such as cyclic alkylene carbonates. Conventional additives, such as nonylphenylpolyglycol ether, alkylpoly-glycol ether, fatty acid polyglycol ester, or fatty alcohol ethoxalates, and preservatives, such as ortho-phenolphenyl and its sodium salt, ortho-hydroxydiphenyl, or 6-acetoxy-2,4-dimethhyl-m-dioxane, may also be added to the mixture. To make the body of the marker, plastic resin is injection-molded into a pen's body. The nib, or tip, of the marker is made from powder mixed with water, molded, and baked into its pointed or flat form. Using one machine for all the following functions, an assembler then places a polyester cylinder inside the marker barrel to form a reservoir for the ink, fills the reservoir with ink, and inserts the nib at the bottom and the cap at the top.
The paper was made from pulp obtained by chemical means, known as kraft pulping. Chips of wood were placed in a large, sealed container known as a digester. The digester contained a strongly alkaline solution of sodium hydroxide and sodium sulfide. The mixture was heated to 320-356° F (160-180°C) at a pressure of about 116 pounds per square inch (800 kilopascals).
After each bleach mixture, the pulp is washed with an alkaline solution that removes the treated lignin. Fillers are added to the pulp. Other chemicals often added to pulp include starches or gums. Rosin (a substance derived from pine trees) and alum (aluminum sulfate) are often added as sizers, making the paper less absorbent. Pulp is added to water to form slurry . The slurry is pumped onto a moving mesh screen made up of very fine wires of metal or plastic. Water drains, forming a sheet of wet material. The sheet is moved on a series of belst made of felt containing wool, cotton, and synthetic fibers.
Layered paper is produced by putting a number of sheets of paper in a stack and gluing them together. Using a photographic process a negative of the image is exposed to a flat plate and coated with a light sensitive material. The plate is developed, and the image area is coated with an oily material that will attract ink but repel water. The non-image area is coated. One plate per color is created. The plate is passed under a roller on the printing press, which coats it with water. The card paper is passed under the rubber roller and the ink is transferred to it. This is done in color order. The ink dries before it enters the next roller assembly. This process of wetting, inking, and printing is continuous throughout the card manufacturing run. After both sides of the pasteboards are printed, they are transported to a card cutting station. Precision-cutting machines cut the cards out from the printed sheets.