CFR

29.2437—Heavy Leaf (B Group).

This group consists of leaves usually grown at or above the center portion of the stalk. These leaves have a pointed tip, tend to fold, are heavier in body than those of the X or C groups, and show no ground injury. Choice- and fine-quality leaves of this group have a distinctive, smooth leaf surface.

U.S. grades	Grade names and specifications
B1F	Choice Medium-brown Heavy Leaf.
	Medium body, ripe, firm, oily, semi-elastic, strong, bright finish, deep color intensity, broad, 95 percent uniform, and 5 percent injury tolerance.
B2F	Fine Medium-brown Heavy Leaf.
	Medium body, ripe, firm, oily, semi-elastic, strong, clear finish, deep color intensity, spready, 90 percent uniform, and 10 percent injury tolerance.
B3F	Good Medium-brown Heavy Leaf.
	Medium body, mature, firm, oily, semielastic, normal strength, clear finish, moderate color intensity, normal width, 80 percent uniform, and 20 percent injury tolerance.
B4F	Fair Medium-brown Heavy Leaf.
	Medium body, mature, close, lean in oil, inelastic, weak, dull-finish, pale color intensity, narrow, 70 percent uniform, and 30 percent injury tolerance.
B5F	Low Medium-brown Heavy Leaf.
	Medium body, mature, close, lean in oil, inelastic, weak, dull finish, pale color intensity, narrow, 60 percent uniform, and 40 percent injury tolerance.
B1D	Choice Dark-brown Heavy Leaf.
	Heavy, ripe, firm, oily, semielastic, strong, bright finish, deep color intensity, spready, 95 percent uniform, and 5 percent injury tolerance.
B2D	Fine Dark-brown Heavy Leaf.
	Heavy, ripe, firm, oily, semielastic, strong, clear finish, deep color intensity, spready, 90 percent uniform, and 10 percent injury tolerance.
B3D	Good Dark-brown Heavy Leaf.
	Heavy, mature, firm, oily, semi-elastic, normal strength, clear finish, moderate color intensity, normal width, 80 percent uniform, and 20 percent injury tolerance.
B4D	Fair Dark-brown Heavy Leaf.
	Heavy, mature, close, lean in oil, inelastic, weak, dull finish, pale color intensity, narrow, 70 percent uniform, and 30 percent injury tolerance.
B5D	Low Dark-brown Heavy Leaf.
	Heavy, mature, close, lean in oil, inelastic, weak, dull finish, pale color intensity, narrow, 60 percent uniform, and 40 percent injury tolerance.
B3M	Good Mixed Color Heavy Leaf.
	Medium to heavy body, mature, firm, oily, semielastic, normal strength and width, 80 percent uniform, and 20 percent injury tolerance.
B4M	Fair Mixed Color Heavy Leaf.
	Medium to heavy body, mature, close, lean in oil, inelastic, weak, narrow, 70 percent uniform, and 30 percent injury tolerance.
B5M	Low Mixed Color Heavy Leaf.
	Medium to heavy body, mature, close, lean in oil, inelastic, weak, narrow, 60 percent uniform, and 40 percent injury tolerance.
B3G	Good Green Heavy Leaf.
	Medium to heavy body, mature, firm, oily, semielastic, normal strength, clear finish, normal width, 80 percent uniform, and 20 percent injury tolerance.
B4G	Fair Green Heavy Leaf.
	Medium to heavy body, immature, close, lean in oil, inelastic, weak, dull finish, narrow, 70 percent uniform, and 30 percent injury tolerance.
B5G	Low Green Heavy Leaf.
	Medium to heavy body, immature, close, lean in oil, inelastic, weak, dull finish, narrow, 60 percent uniform, and 40 percent injury tolerance.

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