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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. It is sold in many colors, though it can also be painted once fired. It has become popular with modeling artists. It is also sometimes used for claymation.
Sculpey is a brand of polymer clay made by Polyform Products in the United States. Sculpey was first created in the early 1960s. The original idea was to use the clay as a thermal transfer compound; this would conduct heat away from the cores of electrical transformers. However, the compound was not successful for this use so it was pushed to the side for a while. In the late 1960s it was then discovered that this compound could be molded, baked, sanded, drilled, carved and painted. This was a perfect 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 is 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".
In addition to polymer clay, Sculpey also provides artists and hobbyists with numerous tools and products. Sculpey offers various molds and texture makers, a clay conditioning machine, acrylic rollers, a clay mat (for use as a work surface), clay slicers, and tool kits. These products are made especially for use with Sculpey polymer clay. In 2013, Sculpey added edgy and landscape texture sheets to their growing family of polymer clay tools and products. , ,
Many techniques exist for working with polymer clay.
Sculpture involves creating detailed representations of objects.
Caning is a technique borrowed from glass artisans, who would know it as millefiori, meaning "a thousand flowers". It involves making a picture from thick pieces of polymer clay, which is then extruded so the picture becomes smaller and it becomes thicker, until it is longer than it is high. The cane has the original picture running right through it, although smaller. It can then be sliced, with the slices used to cover other objects or blobs of scrap polymer clay.
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.
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.
Sculpey is usually available in 2-ounce (57 g) squares, but can be purchased in 1 pound (450 g) blocks. There are a variety of clays available.
There are several types of Sculpey available: Sculpey III, Premo!, Premo!Accents,Super Sculpey, Pluffy, UltraLight, Bake Shop and Original Sculpey. The clay is available in a wide range of colors including 'Pearl' which shines after glazing. The clay is soft and pliable from the packaging and does not dry out. The clays harden after baking.
Translucent Sculpey becomes partially transparent when baked. Colors can be added to it, creating effects such as that in the picture.
Granitex contains tiny fibers which create a stone effect. It is not suitable for 'caning' (see above) as the particles cause the image to become blurred and low quality.
The Amazing Eraser Clay functions as an eraser after it is baked. The array of colours available from this range is limited when compared to that of the classic range. This clay is generally sold in packs of five differently coloured half-blocks. It is available in six colors: blue, lime, orange, pink, purple, and mango. 
Sculpey also offers a super flexible clay called Bake & Bend which acts like rubber after baking. It’s perfect for jewelry and is great for kids, as they can play with their creations after they’re baked. It is available in sampler sets of six 1 oz. bars in black, blue, green, red, white, and yellow, and in eight 2 oz. bars in beige, black, blue, green, orange, red, white, and yellow.
Glow in the dark Sculpey comes in four colours, and when a bright light is shined on the clay (before or after it is baked) it will illuminate for a short time. The bright green and blue shine most brightly. It's great for Halloween projects. it perfect for Halloween projects. It’s available in four colors, found in a 1 oz. bar set: traditional glow in the dark, glow green, glow orange, and glow blue. 
Sculpey III is easy to use and bakes in a matte finish and stays soft until baked and holds details well. It is available in 44 colors: white, translucent, sweet potato, black, chocolate, pearl, spring lilac, elephant gray, deep red pearl, fuchsia pearl, yellow, red, beige, tan, light blue pearl, string bean, hazelnut, jewelry gold, glow in the dark, dusty rose, leaf green, emerald, hot pink, turquoise, silver, granny smith, plum, sky blue, pewter, purple, violet, red hot red, blue pearl, gold, ballerina, just orange, lemonade, candy pink, and suede brown. Sculpey added four new colors to their Sculpey III collection in 2013: gentle plum, tranquility, camouflage, and buried treasure. 
Premo! holds detail well and is soft and flexible and it’s strong and durable which makes it great for jewelry and figures. It is available in 34 colors which are based off of an artist’s palette: rhino gray, sunshine, pomegranate, blush, navy blue, alizarin crimson hue, wasabi, white, Spanish olive, orange, beige, raw sienna, black, burnt umber, ecru, denim, cadmium red hue, fuchsia, green, turquoise, purple, ultramarine blue, and cadmium yellow hue. In 2013, Sculpey added a new color to the Premo! family: jungle. 
Premo! Accents is similar to Premo! but contains special effects to make the clay take on a pearl effect, a metallic effect, a translucent effect, and a granite effect. It is available in 24 colors: gray granite, white granite, frost white glitter, 18K gold, peacock pearl, purple pearl, copper, bronze, translucent, silver, blue glitter, green translucent, yellow translucent, red translucent, blue translucent, bright green pearl, magenta pearl, antique gold, white translucent, and gold. Sculpey added two new colors in the Premo! Accents clay line in 2013: twinkle twinkle and green glitter. 
Pluffy clay is a great clay for kids because it never dries out and is lightweight It can be baked if desired and is available in 16 colors: red, black, white, green, pink, blue, yellow, orange, brown, gray, beige, glow in the dark, lime green, aqua, hot pink, and dark purple. 
According to the Sculpey website, UltraLight is the most versatile clay of the Sculpey family. It is lightweight and soft but bakes hard and won’t crack or break once baked, and is great for sculpting larger pieces and figures, and can be mixed with other clay and can be painted. 
Bake Shop is soft, easy to use, and does not dry out; it’s great for kids. It is available in 12 colors: white, beige, red, orange, yellow, hot pink, green, blue, purple, brown, black, and tan. 
Original Sculpey is America’s first oven bake clay, according to the Sculpey website. won’t dry out and is great for the classroom and can be modified using acrylic paint and can be sanded and carved. It’s available in original white and original terracotta. 
- Stop Motion Central, 2007, Claymation Movies (Knox Style), or StopMotion Clay Animation Tutorials Software, Last accessed October 3, 2010.