Panel testing (PT) slides were prepared by Bleach Ammonium sulphate (BAS) and N-acetyl L- Cysteine (NALC) methods. A total of 150 slides were prepared, 80 slides were stained and two different technologists validated 60 slides. Consistency was found true when compared with standard consistency table for all grades in both methods and M±2SD was within the limits. This study suggests that BAS method is equally good as NALC sputum concentration method.