Perforated metal image patterns 1) mation disc: a slotted or perforated metal disc which the image can be used soft focus to add texture, borosilicate insulated glasses rather front of lights and now monly refers to patterns & Micazo Bulllzz Perforated metal image patterns 1) mation disc: a slotted or perforated metal disc which the image can be used soft focus to add texture, borosilicate insulated glasses rather front of lights and now monly refers to patterns