Super clay handmade Chinese zodiac children's fingers itch after playing with ultra-light clay. Is this a victory? Parents can rest assured that good quality ultra-light clay itself is harmless. Ultra-light clay is mainly formed by foaming polymer powder (vacuum microspheres) and then physically mixing it with polyvinyl alcohol, crosslinking agent, pigment and other materials in a certain proportion. Ingredients include foaming powder, water, paper pulp and paste. It is a new type of environmental protection process material, odorless and gender-free, belonging to clay.
So why do children itch after playing with ultra-light clay? In the final analysis, clay has become "harmful" for two reasons: first, many private workshops have taken a fancy to the bright future of clay toys and produced clay products without safety monitoring; Second, some "black-hearted" enterprises add inferior or even harmful chemical components in order to reduce production costs.
Many pigments used in clay contain harmful substances, but large clay brands, with a view to long-term development, will not smash their own signs, and generally use edible pigments. There are also a few high-quality brands that use imported pigments with better quality, which is why some clay is sold very cheaply, but the prices of some big brands will be much higher.
In addition, preservatives and essences may also cause children's fingers to itch after playing with mud. Ultra-light PVA, the main material, is one of the few materials that bacteria like very much, but it also means that it is very easy to deteriorate. How many preservatives to add and what kind to add are all up to the manufacturer's conscience. Some inferior clay will have a so-called "pungent smell" when adding a lot of preservatives, but parents should pay attention to some ultra-light clay that smells "very fragrant". "Fragrance" refers to adding a lot of essence to clay to cover up the smell of preservatives.
How to judge the quality of ultra-light clay According to the suggestion given by Henan Polymer Ultralight Clay Engineering Technology Research Center, parents can distinguish from the following aspects when buying clay: taste. Don't buy ultra-light clay with pungent smell and strong taste; Ultra-light clay with good plasticity has strong plasticity and will not stick to hands; Color. The color fading by hand is due to the use of inferior toner, and it is not recommended to buy it. ; Specific gravity Because the main component of ultra-light clay is polymer foaming component, its specific gravity is between 0.24 and 0.38, products exceeding or below this parameter are unqualified. ; Shrinkage rate. The model made of ultra-light clay is naturally dried in the air, and the shrinkage rate of good ultra-light clay should be less than 5%. After kneading, the work is stable, and cracks are not easy to occur due to shrinkage of various parts.
Super Clay Handmade Zodiac: Zodiac Space Mud Picture Steps Space Mud can be kneaded into many shapes, created at will, and made into various small animals, fruits, food and so on.
Giant star clay Zodiac Encyclopedia We play rover ultra-light clay, and there is a Zodiac gift box with step instructions, tools and modeling. The children squeezed out all kinds of zodiac animals, full of sense of accomplishment and very happy.
How to make ultra-light clay from primary school students' handmade works
Paper clay-characteristics
1. white, non-sticky, good flexibility and plasticity,
2. The work can be colored (watercolor or color) after being dried, and then painted with varnish, which can be preserved for a long time.
3. Imprint making
4. It will not solidify after vacuum packaging for more than half a year.
5. After vacuum unpacking, make the impression model and cure it for about 30 hours. After curing, the pattern can remain unchanged for a long time, without deformation or cracking.
Ultra-light clay-characteristics:
1. Resin clay, light in color, soft and pure white, mainly made of pure natural polymer materials, delicate, transparent, soft and tough, and can maintain elasticity even after drying; It can be used for flowers, shapes, animals, cartoon characters, ornaments and other works, and can also be used for sculpture and model making. It is light, soft and pure white, which is very suitable for handicraft production. 2. It feels delicate, can be stretched very thin without cracking, and can be safely used for various handmade works, which is the best in clay. 3. Ultra-light clay is 1/8 the weight of ordinary clay. Even if it is thin, it can support it. Don't make the work too thick. 4. When arranging flowers, you can pose as you like, and you don't need to put any heavy stones in the flowerpot. You can use utensils, which is very expressive. When you glue them back together, it won't crack. It adopts all kinds of new materials, which is odorless and tasteless. 6. You can change the color of clay with a water-based pen or watercolor paint.
The above is related to ultra-light mud, and it is about the steps of sharing pictures of space mud in the zodiac. I watched the super clay handmade zodiac, I hope this will help everyone!