What is clay
Clay is a sedimentary rock. In the dry, it is pulverized, and when wet becomes plastic. It contains one or more group minerals kaolinite and montmorillonite, but can also carry sand connection.
The clay is mostly gray, but there are varieties in white, red, yellow, brown, blue, green, purple and even black. This is due to the substances contained in each type of clay. Depending on these substances and the various applications of clays.
As this breed has a high plasticity, fire resistance, an excellent sintering behavior and a good waterproofing, it has found wide application in pottery, art and brick making. Often, however, the pottery at the stage of molding or drying, or in a final stage, the kiln, the crack. This can happen for several reasons: clay is dry, clay "skinny", that is, it has a large admixture of sand, or Vice versa, selected varieties too "fat".
Additives for clay solution
To prevent the possibility of cracking on the product, it is necessary at the outset to choose the "right" type of clay. Ideal for pottery blue and white clay. But sometimes the correct selection of material is not enough.
If the product cracks due to insufficient moisture, the problem is solved by simply adding water to the clay solution.
However, sometimes the pottery is cracking because of the excessive "fat" solution. "Fat" is called clay with high plasticity. In soaked condition they give a tactile feeling greasy substances. The dough of a clay shiny, slippery and contains almost no impurities. In this case, the solutions of a clay added to the so-called "emaciated" substance: "skinny" clay, burnt brick, pottery battle or sawdust and sand – ordinary or quartz.
But sometimes the reverse situation – product crack because of too "lean" clay. This material is non-plastic or low-plasticity, rough to the touch, has a matte surface and crumbles easily, even with a simple tap of your finger. It contains a very large number of impurities in the form of sand, dust, earthy. In this case, it is necessary to carry out the reverse operation – to add to the "lean" clay more oily or make use of other supplements that increase the fat content of a solution, e.g., glycerin or egg white.
There is another method to taciti solution. Its essence is added to a solution of water and thorough stirring. The solution was allowed to stand. In the upper layer is water, which is drained. The next layer is liquid clay, and under it unwanted additives. Liquid clay gently dredged and drained in the basin, leaving in the sun to evaporate excess moisture. The result is a plastic clay consistency of firm dough.
Advice 2: How to make beads from polymer clay
Making jewelry from polymer clay can not only inspire you but also be a very rewarding hobby. Original necklaces, earrings, bracelets enrich the wardrobe and will be a nice gift for the holidays for your friends. The material for the craft is divided into two big types – it is bake plastic and solidifying in the air. If you want to make beads with simplified technology, work with self-hardening plastic.
You will need
- polymer clay;
- - a rolling pin;
- - rubber gloves;
- Board for rolling out plastics;
- - toothpicks;
- - scalpel or razor blade;
- - ribbon or lace.
The first stage - the production of cylinder interesting colors of the plastic. It can be rolled several ways. Try different and find the one that is best for you.
The first method. Cut the plastic different colors of the same large cubes. Connect them together into one layer and remember little hands, polymer clay warmed up, otherwise it while rolling will crack. Put the plastic on a flat, preferably glass surface. Can be used for rolling silicone Mat. Take a smooth rolling pin or glass bottle. Several times press the clay. Fold it and walk again with a rolling pin. You should now have a thin polymeric layer with a smooth transition from one color to another. Take a white polymer clay and roll it into a thin layer. Put this layer on rainbow and turn dense roll. Wear rubber gloves and roll it with your hands to compact. Between the layers should not be air. Blank beads ready.
The second method. Put on your gloves and gather in the hands of polymer clay several long plaits of different colors. Put them together and rumple, twist, fold as you would think. Then you can just make a billet cylinder and can roll out into a thin layer and rolled into a roll. But the roll will need to be sealed.
Make the basis for round beads. Take a piece of plastic, tsepinite and roll his balls of desired size. It is possible to cut polymer clay into small pieces, and from them to form a round base.
Cut with a razor or scalpel from the prepared any way you colored sausage thin plates. To stick them on the base. One ball may take one or two laps. Shape flat smooth beads.
Make the bead hole with a toothpick or knitting needle. If the plastic is very soft, crushed when the piercing, then leave the beads to fully harden. Then drill the holes with a drill.
Allow the beads to harden in the air. Then thread the holes in the ribbon or lace. Your beads are ready.
Advice 3: How to find clay
Clay is a sedimentary rock, which, depending on its composition, is used for many purposes – from construction to cosmetology. Due to its plasticity and the possibility of further processing, this material is ideal for molding tableware, crafts and other items. Moreover, to get it now no problem.
Buy clay in the store. This is the easiest and quite affordable way to get the material. Usually it is sold in the stationery Department or in stores specializing in the sale of products for independent creativity. The usual grey clay has a smooth and elastic structure, ideal for beginners in modeling.
For those who are already fairly good sculpts, you can buy blue clay. It is sold most often in powder form, Packed in big packages for a few pounds. Before using it one must sift through a fine sieve to clear from the contained pebbles. And then be diluted with water according to packaging instructions.
Use natural clay. You can find her on the shore of a river, pond or gully. However, modeling is not suitable, all natural clay, but only the one which has good elasticity and does not form after drying cracks. To determine this, remember the clay in the hand make her a cake and put it in the sun or in a warm place until dry. If the clay is left flat and smooth, you can try to use it in modeling products. However, beginners and children to better understand sculpting with polymer clay.
Before using natural material, prepare it for operation. In this clay often contains small stones, twigs and other debris of the soil, making it unsuitable for sculpting. To start, lay the clay smooth a thin layer on the cloth or plate and dry in the open air, in the oven or on the battery. The dry material is put in a canvas bag and crush to a fine powder. Clay then sift the powder through a fine sieve - this will allow you to separate from it the stones and chips.
Part of the powder pour into the bucket so that he took one-third of capacity. And then to the brim of the bucket, pour warm water. Mix thoroughly until smooth mass and allow it to stand for 1 day. After this time gently scuba cops, dredge liquid clay, trying to capture the settled debris and hard rock.
Put klinoobraznuju ground in a plaster container or several layers of fabric, which absorbs water. After drying, the clay will no longer stick to hands, but at the same time remain plastic, it is ready for sculpting.