#### § 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. |