The French have two standards for silver purity or fineness. The amount of crimp corresponds to the fineness of the wool fibers. This list is organized from highest to lowest millesimal fineness, or purity of the silver. The addition of compressed air improves the fineness of atomization. The fineness of the grind strongly affects brewing. Most grinders can be adjusted to set the fineness of grind. Britannia bullion contains of fine gold at a millesimal fineness of 999 (24 carat). The sterling silver standard has a minimum millesimal fineness of 925. The pressure control during mixing affects the fineness of crumb texture in the finished bread. Due to the importance of a grind's fineness, a uniform grind is highly desirable. This may be one reason for the great fineness and delicacy of their painting. From 2013 the gold coins have a millesimal fineness of 0.9999 (or 24 carat gold). Sultan was amazed by their durability and fineness. Later kings debased the coin, both in weight and fineness. The garment varied in fineness, colour and ornament.