Tin can identification
Tin can identification
In the tea can market, the quality of tin cans is mixed, mainly mixed with a large amount of lead or other metals, and the craftsmanship is rough. Please pay attention to the following points when choosing tin cans:
hear its "sound"
Pure tin material has good ductility and is called "sound tin" because of the sound of twisting. Crafts will deform when they are twisted, so this method cannot be used when buying, but we can "smell it" by an easier method: gently sweep the tin with the fingernail from the palm of the hand outward, 97% of the tin has a clear metal Sound and short echo; 99.9% of the tin sound is not crisp and has no echo, it is a high-quality tin.
Ask its "price"
Tin itself is a precious metal, and every finished product deserves its value.
Look at its "color"
Pure tin, color like silver, bright like a mirror! The tin ware with a content of 97% is polished, although it is not white, it is dark and bright; the tin ware with a content of 99.9% shows a bright silver color after polishing, which is a superior tin ware, which looks like silverware.
Identify its "quality"
Quality refers to the purity of tin utensils. The higher the purity of tin utensils, the more durable it is. Foods are not only harmless, but also can be kept fresh for a long time; tin utensils with low purity are easily spoiled and not durable enough. Imported tin ware is mostly marked with purity, and domestic tin ware is mostly not marked, but we can know a thing or two from its origin.
Reward its "work"
Workmanship refers to the craftsmanship of tin ware. The craftsmanship of tin ware is mostly determined by its purity. The tin ware of 97% and below is hard in texture and suitable for machining. The processed tin ware is often integrated with the relief effect. Not the best, so tea tins are generally designed with inner and outer layers. 99.9% of tin ware is soft in texture and has strong handmade characteristics. A piece of work is mostly composed of several parts, which can show advanced engraving and hollowing process. High-purity tin has good sealing performance. , you can often find that it will bounce back when you force the cover, which is why.
