120G Polythene Bags
Clear Poly Bags (Approx. 12 x 18 in / 305 x 457 mm) — Product Overview
These clear polythene bags are a practical, everyday packaging choice when you need a clean presentation and reliable protection for products in storage, transit, or on display. Manufactured in clear polythene at a listed thickness of 120 gauge (30 micron / 30mu), they provide a lightweight barrier against dust and handling marks while keeping contents visible for quick identification.
This product page may represent multiple pack quantities of the same bag style. The bag size is commonly referenced in both imperial and metric measurements (approximately 12 x 18 inches / 305 x 457 mm), making it easy to match to existing packing specifications.
Key Features
Clear presentation: The transparent film helps you showcase or identify contents without opening the bag—useful for picking, packing, and retail preparation.
Everyday protection: Helps protect items from dust, light scuffs, and general handling during storage and distribution.
Consistent thickness (120g / 30mu): A popular “general purpose” thickness that balances flexibility with durability for many non-sharp products.
Simple, versatile format: A straightforward poly bag format that suits a wide range of packing workflows, from manual packing benches to busy dispatch areas.
Space-efficient storage: Supplied flat, these bags store neatly and are easy to dispense as needed.
Key Features (Bullet Summary)
- Size: approx. 12 x 18 in (305 x 457 mm)
- Material: clear polythene
- Thickness: 120 gauge / 30 micron (30mu)
- Visibility: clear film for easy identification
- Use: general-purpose protection for packing, storage, and distribution
Typical Uses
- Protecting products from dust during storage
- Keeping sets, kits, or components together
- Packaging items for dispatch where visibility helps with order checking
- Retail back-of-house bagging and organisation
- General warehouse picking and packing
Clear Poly Bags (120g / 30mu) — Full Product Guide
Choosing the right polythene bag is about matching the bag’s size and film thickness to your product and your packing process. This guide explains what the listed specifications mean, how these bags typically perform, and how to get the best results in day-to-day use.
How It Works
Polythene bags provide a simple protective enclosure around your product. The clear film acts as a barrier against dust and light surface contamination while allowing the contents to remain visible. In many packing environments, this visibility speeds up picking and reduces errors because items can be checked at a glance.
These bags are commonly used as an inner pack (inside a carton or mailing bag) or as a standalone protective bag for storage and handling. They are also frequently used to group multiple items together—helpful when you need to keep components, accessories, or paperwork with the main product.
Materials and Construction
The bags are made from clear polythene. Polythene film is valued for its flexibility, low weight, and resistance to moisture in typical storage conditions. The listed thickness for this product is 120 gauge, also shown as 30 micron (30mu). This thickness is widely used for general-purpose packaging where you want a dependable bag without moving into heavy-duty film.
Because polythene is flexible, it conforms around many shapes and helps reduce wasted space compared with rigid packaging. It also folds flat, which makes it efficient to store in bulk and easy to handle at a packing station.
Understanding the Size (Imperial and Metric)
This product is described as 12 x 18 and also as 305 x 457 mm. These are two ways of expressing the same approximate bag size. If your operation uses mixed specifications (for example, legacy imperial sizes in purchasing but metric measurements on internal documentation), having both references can make ordering and stock control simpler.
When selecting a bag size, consider not only the flat dimensions of the item but also its thickness/bulk. Products with depth may require a larger bag to allow comfortable insertion and to avoid stressing seams. If you are packing multiple items together, allow extra room for the combined bulk.
Thickness Guide: 120 Gauge / 30 Micron (30mu)
Film thickness is one of the most important factors in performance. At 120 gauge (30 micron), these bags are typically chosen for everyday packing tasks where the contents are not sharp or highly abrasive. This thickness is often used for clothing, printed materials, boxed items, and general components.
If your products have sharp corners, exposed edges, or heavy weight, you may need a thicker film to reduce the risk of punctures or tearing. Conversely, if you are packing very lightweight items and want to minimise material use, a thinner film may be suitable. The best choice depends on your product and handling conditions.
Floor Type Compatibility (Warehouse & Packing Environments)
While “floor compatibility” is more commonly discussed for tapes and protective films, it can still matter for poly bags in busy packing areas. Clear poly bags are lightweight and can be affected by airflow from doors, fans, or conveyors. In warehouses with smooth floors, dropped bags can slide and become a housekeeping issue.
Good practice is to keep bags in a dispenser or carton at the packing bench, and to maintain clear walkways. If you use automated or semi-automated packing lines, ensure the bag format and thickness are suitable for your dispensing method.
Health and Safety
As with all plastic bags, keep away from babies and children to avoid suffocation risk. In a workplace setting, store bags neatly to prevent slips or trips caused by loose packaging on the floor. If you are packing food or medical items, confirm suitability for your specific compliance requirements and intended use before purchase.
When opening bags quickly in high-volume environments, consider training and safe handling practices to reduce repetitive strain and to avoid paper cuts or minor abrasions from associated packaging materials.
Ideal Applications and Use Cases
These clear poly bags are commonly used across retail, e-commerce, warehousing, manufacturing, and office environments. Typical applications include:
- Retail preparation: keeping garments, textiles, or boxed goods clean and presentable.
- E-commerce fulfilment: using as an inner protective layer inside mailing bags or cartons.
- Warehousing: organising stock, separating SKUs, and protecting items from dust.
- Manufacturing and assembly: bagging components, kits, or spare parts for easy identification.
- Printed materials: protecting brochures, manuals, or paperwork from handling marks.
If you are unsure whether 30 micron is right for your product, a simple test is to pack a sample item and simulate your normal handling: insertion, stacking, and a short transit cycle. This quickly reveals whether you need more thickness or a different bag style.
Maintenance, Cleaning and Care
Polythene bags are typically supplied ready to use and do not require cleaning. Store them in a clean, dry area away from direct heat sources and prolonged sunlight. Keeping bags in their outer carton until needed helps prevent dust build-up and keeps the film clear for presentation.
To maintain efficient packing:
- Keep bags near the point of use in a dispenser or open carton.
- Avoid overfilling; choose a larger size if insertion is tight.
- Handle with clean hands or gloves if presentation is important.
Case Study (Typical Workflow Example)
Scenario: A small e-commerce operation dispatches mixed orders containing boxed items and accessories. The team needs a quick way to keep items clean and grouped while allowing easy order checking.
Approach: Items are placed into clear poly bags at the packing bench before being put into cartons. Because the contents remain visible, packers can verify the correct SKU and quantity without reopening packaging. The bag also reduces scuffing and keeps small accessories from moving around inside the carton.
Outcome: Faster packing checks, improved presentation on arrival, and fewer issues with missing small components.
Who Is It For?
- Businesses that want a clear, simple protective bag for everyday packing
- Warehouses and stockrooms that need quick visual identification of contents
- Retailers preparing goods for storage or customer collection
- Manufacturers and assemblers creating kits or bagging components
Colours / Features Available
This listing is for clear poly bags. Clear film is ideal when visibility is important for picking, presentation, or quality checks. If you require tinted, printed, or specialist bags (for example, anti-static or resealable formats), consider alternative bag types depending on your application.
Sizes Available
This product page relates to the 12 x 18 size (approx. 305 x 457 mm) in the 120g / 30mu thickness range. Sapphire product pages may include multiple pack quantities for the same bag size and specification. If you need a different size, the wider 120g (30mu) clear poly bag range may offer additional options.
Need help choosing? If you tell us what you’re packing (dimensions, weight, and whether there are sharp edges), we can help you select the most suitable bag size and thickness for your workflow.