Carnival Glass is a moulded pressed glass distinguished by its shimmering iridescent surface, created by applying metallic salts while the glass was still hot. First introduced in the early twentieth century, it was originally produced as an affordable alternative to luxury iridescent art glass by makers including Fenton, Northwood and Imperial Glass. Antique carnival glass is recognised for its vibrant colours, lustrous finish and decorative patterns, making it popular with collectors worldwide.