The feathery, fernlike patterns form as the crystal growth follows minute imperfections on the glass surface, such as scratches, soap streaks, dust, etc. which act as condensation sites.

• 羽毛似，如同蕨类的样式形成，当作为结露站点的晶体成长跟随在玻璃表面的详细的缺点，例如抓痕，肥皂条纹、尘土等等。