Fresh Keeping Bag Pre-Cut Roll

What are some tips to quickly expand the fresh keeping bag pre-cut roll?
In the bustling aisles of supermarkets and grocery stores, one often encounters the ubiquitous fresh keeping bag pre-cut roll. This ingenious creation, a roll of connected bags with perforated lines, has revolutionized the way customers handle fresh produce. 
While the fresh keeping bag pre-cut roll offers unparalleled convenience, some users have encountered difficulties in quickly expanding the bag's mouth. The flat, snug fit of the bag's opening can sometimes pose a minor inconvenience during busy shopping trips or when handling delicate items.
Prep and Positioning: Before tearing off a bag from the roll, gently massage the perforated lines near the opening. This helps loosen the bag and prepares it for effortless expansion. Additionally, ensure that the bag is positioned flat on a stable surface for optimal control.
Thumb Technique: Utilize your thumb and index finger to grip the edges of the bag's mouth. Apply gentle outward pressure while simultaneously pulling upwards. This technique allows for smooth expansion without compromising the integrity of the bag.
Air Infusion: For stubborn bags that resist opening, introduce a small puff of air into the bag before attempting to expand it. This simple trick creates internal pressure, making it easier to separate the bag's layers and achieve a fully opened mouth.