Chemical SOP
Microbiology SOP
Warehouse SOP
Manufacturing SOP
Information technology SOP

1. Pre-entry checks (outside change room)

Before even touching the change room door:


2. Change Room – Stage 1 (Black to Grey)

Purpose: Remove gross contamination from outside environment.


3. Handwashing & Hand Disinfection

Performed before putting on sterile gloves.

  1. Remove visible dirt under nails (no long nails).
  2. Turn on water (hands-free tap if available).
  3. Wet hands and forearms up to the elbow.
  4. Use approved non-perfumed antiseptic soap.
  5. Wash for at least 30–60 seconds:
    • Palm to palm
    • Back of hands
    • Between fingers
    • Fingertips & nails
    • Thumbs
    • Wrists / forearms
  6. Rinse thoroughly – no soap residue.
  7. Dry with lint-free single-use towels.
  8. Apply alcohol-based hand rub (ABHR) and allow to air dry completely.

4. Change Room – Stage 2 (Grey to White)

This is where you wear sterile cleanroom garments.

Typical sequence (never touch the outside of sterile garments with unclean hands):

  1. Don hood / head cover
    • Ensure all hair and ears are fully covered.
  2. Face mask
    • Cover nose, mouth, and chin; mold nose strip; no gaps.
  3. Shoe covers / boots
    • Wear over plant shoes or use dedicated sterile boots.
    • Tuck trouser legs inside if required by SOP.
  4. Inner sterile gloves (if double-gloving)
    • Open sterile pack correctly.
    • Touch only inner surface while donning.
  5. Sterile coverall / suit
    • Handle from inner surface only.
    • Avoid touching the floor.
    • Zip fully; ensure cuffs and ankles are properly closed.
  6. Goggles / eye protection
    • Use sterilized goggles (packed or autoclaved).
    • Ensure no fogging; if fogging, adjust before entry.
  7. Outer sterile gloves
    • Disinfect inner gloves with ABHR, let dry.
    • Open outer glove pack aseptically.
    • Don without touching outer surface with bare skin.
  8. Final check in mirror
    • No exposed hair, no gaps in mask, zipper closed, boots secure.

Golden rule: Once gowned, do not touch face, mask, hood, or non-sterile surfaces. If you do, disinfect or change gloves/garments as per SOP.


5. Airlock Entry to Aseptic Area


6. Behaviour Inside Aseptic Area

Once inside:


7. Re-entry & Re-use Rules


8. Common Non-compliances (to use as “Don’t” list on a poster)

Leave a Reply

Your email address will not be published. Required fields are marked *

error: Content is protected !!