Wilson Bentley’s Black Velvet

Origin
Wilson Bentley was one of the first and most successful photographers of snowflakes. He perfected a method to catch the flakes on black velvet and photograph them before they melted, capturing the intricate arms that differentiated each one.

Effects
When shaken, it releases large amounts of snowflakes. They are all unique and the user can control the size of the individual flakes. The more flakes created, the quicker the surrounding air temperature will drop, which can lead to sudden freezing.