You got specific colors by adding metallic compounds to the other glassmaking ingredients.
通过在其他制作玻璃的原料中添加金属化合物，你可以得到特定的颜色。
2
Up until the 16th century, stained glass was colored during the glassmaking process itself.
直到16世纪，彩色玻璃都是在玻璃制造过程中着色的。
3
As you probably know, it's well used by younger people in our community, but unfortunately we're getting more and more reports of broken glassmaking it especially dangerous for younger children.