Preparation materials: colored mud, iron sheet, small dish, pigment, scissors, iron sign.
1. First, squeeze out balls of various colors, as shown in the figure.
2. Crush one of the balls, as shown in the figure.
3. After flattening, cut a seam with iron sheet.
4. Then put it on a small plate.
5. Treat all the balls in the same way, and then gently press them with your fingers.
6. Apply white pigment again.
7. Knead a piece of white mud into a long strip and cut it short with scissors.
8. Put the white mud on the prepared snacks.
9. done.
Clay is made of a very small plastic aluminum silicate. It contains iron, potassium, calcium, magnesium and sodium. Clay is mainly silicate mineral formed after weathering of the earth's surface. The classification of clay can be divided into three types: geological origin classification, high temperature resistance classification, impurity classification and habit classification.
It can be divided into primary clay and secondary clay. Primary clay is a kind of residue after weathering of parent rock, so it has coarse particles, high sintering temperature and poor plasticity. Secondary clay is clay transported from rivers to rivers and swamps, with fine particles, many impurities, low firing temperature and strong plasticity. It can be divided into kaolin, cohesive soil, barren clay and shale.
Kaolin is mainly used to make ceramics and refractories, with coarse particles and no impurities. Cohesive soil is secondary clay with fine particles, good plasticity and many impurities. Infertile soil is a kind of hard clay that does not loosen when it meets water and has poor plasticity. Shale has the same performance as poor clay, but it contains a lot of impurities.