Float glass is produced by floating molten glass on a bath of molten tin, yielding a flat, fire-polished surface; it classifies in heading 7005. Cast and rolled glass is formed by pouring or passing glass through rollers, often producing a textured or patterned surface. The manufacturing process — not the end use — determines which heading applies.

No. The heading explicitly includes glass having an absorbent, reflecting, or non-reflecting layer, provided the glass is not otherwise worked (e.g., not cut to shape, bent, or edge-worked). Once the glass is further worked beyond the permitted surface treatments, it would move to heading 7006 or another more specific heading.