ZX (12 mg) | Strong tobacco on fire end | Increased strength | Matched Marlboro with increased smoothness at end of cigarette |
| Smoother tobacco on filter end | Increased smoothness | |
| Reduced differential between ends | Reduced harshness | |
|
CT-790-A | Experimental G-7 (without G-9) | Increased smoothness | Smoother product but too harsh; recommend further development using prototype as basis |
| Experimental G-13 (puffed tobacco without top dressing) | Increased smoothness | |
| No air dilution | Increased strength | |
| No denicotinised tobacco (KDN) | Increased strength | |
|
CT-1559-B | Lower nicotine burley | Increased smoothness | Implemented in February 1989 as Camel Lights; rated parity to Marlboro on acceptance |
| Low nicotine flue cured tobacco | Less harsh, smoother | |
| G-7-4 (new reconstituted sheet) | Improved acceptance | |
| Increased humectant | Increased smoothness | |
| New top dressing | Increased smoothness; “Marlboro-Like” | |
| Reduced draft/reduced draw resistance | Increase strength without harshness | |
|
CT-1582 A/D | No burley casing | Decreased harshness | Preliminary testing found increased smoothness among 18–20 year olds; manufacturing prototype too harsh, less smooth |
| Low pack moisture | Increased strength | |
| 4% Glystar (Hystar/glycerin) | Decreased harshness | |
| K22 (Heat treated burley, no KDN) | Decreased harshness | |
| Decreased dilution/ increased draft | Increased tobacco taste | |