Sculpey

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A block of Sculpey
Figurines made of Sculpey Cosmic Blossoms A-Side.jpg
Figurines made of Sculpey

Sculpey (often misspelled as Sculpy) is the brand name for a type of polymer clay that can be molded and put into a conventional oven to harden, as opposed to typical modeling clays, which require a much hotter oven, such as a kiln. Until it is baked, Sculpey has a consistency somewhat like Plasticine. Its main competitor is the German brand Fimo. It is sold in many colors, but can also be painted once baked. Sculpey has become popular with modeling artists, jewellery makers, and other craft work.

Contents

The primary ingredient in Sculpey is polyvinyl chloride, augmented with fillers, plasticizers and colorants. Aside from the hazards of overheating and combustion, which can generate hydrochloric acid and other toxins, Sculpey is nontoxic both before and after hardening. [1]

History

Sculpey is a brand of polymer clay made by Polyform Products in the United States. The compound was first created in the early 1960s, with the original idea being to use the clay as a thermal transfer compound which would conduct heat away from the cores of electrical transformers. However, the usage of the compound for this purpose turned out to be unsuccessful. The material was neglected for a period of time, until the late 1960s, when it was discovered that the compound could be molded, baked, sanded, drilled, carved and painted. It became a highly versatile medium for the craft industry. The clay was marketed directly to people at craft shows, street fairs and demonstrations in small art stores.

Sculpey closely resembles Fimo, another brand of polymer clay. Sculpey has a less rigid composition which better suits modeling, while Fimo is better suited for twisting into cane and bead making because the colors do not blend together as readily. The plasticity is controlled by the amount of oil suspending the polymers in the "clay".

Today, Sculpey offers six variations of polymer clay: Sculpey Soufflé, Sculpey Premo, Sculpey III, Sculpey BakeShop, Super Sculpey and Sculpey Original. [2] It also manufactures various liquid clay products [3] and polymer clay tools. [4]

Techniques

Many techniques exist for working with polymer clay. Caning is a technique borrowed from glass artisans, who used the name millefiori, meaning "a thousand flowers". It involves making a picture from thick pieces of polymer clay, which are then extruded so the picture becomes smaller, and the cane much longer. The original picture can then be seen running throughout the length of the cane, though smaller. It can then be sliced, with the slices used to cover other objects or blobs of scrap polymer clay. [5]

Marbling is one of the simplest techniques used with polymer clay. It involves mixing different colors of polymer clay together to form a pattern. As the clay is mixed, the pattern becomes smaller and smaller, until the two colors are completely blended.

Colors can be mixed by combining various colors of clay, [6] alcohol inks, mica powder or paints. [7]

Mokume-Gane is a technique borrowed from metalworking. It involves placing several sheets of clay on top of each other and then pushing an object through it.

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Paint Pigment applied over a surface that dries as a solid film

Paint is any pigmented liquid, liquefiable, or solid mastic composition that, after application to a substrate in a thin layer, converts to a solid film. It is most commonly used to protect, color, or provide texture to objects. Paint can be made or purchased in many colors—and in many different types, such as watercolor or synthetic. Paint is typically stored, sold, and applied as a liquid, but most types dry into a solid. Most paints are either oil-based or water-based and each have distinct characteristics. For one, it is illegal in most municipalities to discard oil based paint down household drains or sewers. Solvents for clean up are also different for water based paint than they are for oil based paint. Water-based paints and oil-based paints will cure differently based on the outside ambient temperature of the object being painted Usually the object being painted must be over 10 °C (50 °F), although some manufacturers of external paints/primers claim they can be applied when temperatures are as low as 2 °C (35 °F).

Baking Food producing method

Baking is a method of preparing food that uses dry heat, typically in an oven, but can also be done in hot ashes, or on hot stones. The most common baked item is bread but many other types of foods are baked. Heat is gradually transferred "from the surface of cakes, cookies, and breads to their center. As heat travels through, it transforms batters and doughs into baked goods and more with a firm dry crust and a softer center". Baking can be combined with grilling to produce a hybrid barbecue variant by using both methods simultaneously, or one after the other. Baking is related to barbecuing because the concept of the masonry oven is similar to that of a smoke pit.

Silicone Liquid or rubbery, heat-resistant, stable substance consisting of polymers or oligomers of siloxane with other atoms

A silicone or polysiloxane is a polymer made up of siloxane (−R2Si−O−SiR2−, where R = organic group). They are typically colorless, oils or rubber-like substances. Silicones are used in sealants, adhesives, lubricants, medicine, cooking utensils, and thermal and electrical insulation. Some common forms include silicone oil, silicone grease, silicone rubber, silicone resin, and silicone caulk.

Thermoplastic Plastic that becomes soft when heated and hard when cooled

A thermoplastic, or thermosoftening plastic, is a plastic polymer material that becomes pliable or moldable at a certain elevated temperature and solidifies upon cooling.

Play-Doh Childrens modeling compound

Play-Doh is a modeling compound used by young children for arts and crafts projects at home. The product was first manufactured in Cincinnati, Ohio, United States, as a wallpaper cleaner in the 1930s. Play-Doh was then reworked and marketed to Cincinnati schools in the mid-1950s. Play-Doh was demonstrated at an educational convention in 1956 and prominent department stores opened retail accounts. Advertisements promoting Play-Doh on influential children's television shows in 1957 furthered the product's sales. Since its launch on the toy market in the mid-1950s, Play-Doh has generated a considerable amount of ancillary merchandise such as the Fun Factory.

Fimo

Fimo is a name for a brand of polymer clay made by German company Staedtler. Fimo is sold worldwide. Its main U.S. competitor is the American brand Sculpey. The material comes in many different colors; there are many finishes to choose from, and even a softener to use with it because it can be hard to work. It is used for making many objects, including jewelry, accessories, and small ornaments. Once shaped, Fimo is baked in a standard or toaster oven for about 30 minutes at 130 °C (265 °F) to harden it. Once baked, it can be cut, drilled, painted, sanded, and sliced thinly. According to information from Staedtler, Fimo contains polyvinyl chloride (PVC), but has not contained any phthalates since 2006.

Polymer clay

Polymer clay is a type of hardenable modeling clay based on the polymer polyvinyl chloride (PVC). It typically contains no clay minerals, but like mineral clay a liquid is added to dry particles until it achieves gel-like working properties, and similarly, the part is put into an oven to harden, hence its colloquial designation as clay. Polymer clay is generally used for making arts and craft items, and is also used in commercial applications to make decorative parts. Art made from polymer clay can now be found in major museums.

Millefiori

Millefiori is a glasswork technique which produces distinctive decorative patterns on glassware. The term millefiori is a combination of the Italian words "mille" (thousand) and "fiori" (flowers). Apsley Pellatt in his book Curiosities of Glass Making was the first to use the term "millefiori", which appeared in the Oxford English Dictionary in 1849; prior to that, the beads were called mosaic beads. While the use of this technique long precedes the term "millefiori", it is now most frequently associated with Venetian glassware.

Rotational molding involves a heated hollow mold which is filled with a charge or shot weight of material

Rotational molding involves a heated hollow mold which is filled with a charge or shot weight of material. It is then slowly rotated, causing the softened material to disperse and stick to the walls of the mold. In order to maintain even thickness throughout the part, the mold continues to rotate at all times during the heating phase and to avoid sagging or deformation also during the cooling phase. The process was applied to plastics in the 1950s but in the early years was little used because it was a slow process restricted to a small number of plastics. Over time, improvements in process control and developments with plastic powders have resulted in increased use.

Melt and Pour soap crafting is a process often used by soapmakers, both for large scale (commercial) and small scale manufacture. Small scale artisan soap makers find "melt and pour" production useful when trying out new product lines. The process differs from the cold process or hot process in utilising a pre-manufactured solid soap base which has already undergone saponification, so the soap maker does not need to handle caustic alkali, i.e. lye.

Spin casting, also known as centrifugal rubber mold casting (CRMC), is a method of utilizing inertia to produce castings from a rubber mold. Typically, a disc-shaped mold is spun along its central axis at a set speed. The casting material, usually molten metal or liquid thermoset plastic, is then poured in through an opening at the top-center of the mold. The filled mold then continues to spin as the metal solidifies.

Powder coating Type of coating applied as a free-flowing, dry powder.

Powder coating is a type of coating that is applied as a free-flowing, dry powder. Unlike conventional liquid paint which is delivered via an evaporating solvent, powder coating is typically applied electrostatically and then cured under heat or with ultraviolet light. The powder may be a thermoplastic or a thermoset polymer. It is usually used to create a hard finish that is tougher than conventional paint. Powder coating is mainly used for coating of metals, such as household appliances, aluminium extrusions, drum hardware, automobiles, and bicycle frames. Advancements in powder coating technology like UV curable powder coatings allow for other materials such as plastics, composites, carbon fiber, and MDF to be powder coated due to the minimum heat and oven dwell time required to process these components.

Modelling clay Any of a group of malleable substances used in building and sculpting

Modelling clay is any of a group of malleable substances used in building and sculpting. The material compositions and production processes vary considerably.

Kato polyclay is a brand of oven-hardening polymer clay. The concept of Kato Polyclay was created by the collaboration of Donna Kato, a polymer clay artist, and Van Aken International, a manufacturer of modeling compounds. The material is intended for decorative use such as jewelry, dolls, boxes or vases.

Barbara McGuire is an American artist who is recognized for her works in polymer clay, painting and jewelry design. She has written twelve books and numerous magazine articles on design and instruction including books on polymer clay, wire, beads, and children's art. Her books have been described as "among the most articulate and thoughtful books on polymer clay out there." Her artwork incorporates a strong element of traditional design with innovative materials and artifacts.

Cake decorating

Cake decorating is one of the sugar arts that uses icing or frosting and other edible decorative elements to make plain cakes more visually interesting. Alternatively, cakes can be molded and sculpted to resemble three-dimensional persons, places and things.

Plastisol

Plastisol is a suspension of polyvinyl chloride (PVC) or other polymer particles in a liquid plasticizer; it flows as a liquid and can be poured into a heated mold.

Solid surface Man-made material usually composed of a combination of marble dust, bauxite, acrylic, epoxy or polyester resins and pigments

Solid surface is a man-made material usually composed of a combination of alumina trihydrate (ATH), acrylic, epoxy or polyester resins and pigments. It is most frequently used for seamless countertop installations.

Resin casting is a method of plastic casting where a mold is filled with a liquid synthetic resin, which then hardens. It is primarily used for small-scale production like industrial prototypes and dentistry. It can be done by amateur hobbyists with little initial investment, and is used in the production of collectible toys, models and figures, as well as small-scale jewellery production.

References

  1. Material Safety Data Sheet for Premo Sculpey Clay, Polyform Products, Sept. 19, 2012.
  2. "Polymer Over Bake Clay | Sculpey.com". www.sculpey.com. Retrieved 2021-04-28.
  3. "Liquid Polymer Clay | Clay Glue | Sculpey.com". www.sculpey.com. Retrieved 2021-04-28.
  4. "Polymer Clay Accessories And Tools | Sculpey.com". www.sculpey.com. Retrieved 2021-04-28.
  5. http://www.sculpey.com/how-tos/techniques/simple-canes
  6. "Color Mixing". Sculpey Blog. Retrieved 2021-04-28.
  7. "Pigments vs. Dyes — What Is the Difference?". Sculpey Blog. Retrieved 2021-04-28.