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Grey Mailing Bags 12 x 16 Inches - 55 Microns (100 per pack)
From £0.04/ unit • Ex VAT
Product Code: 5474
·
SKU VSG-BM1KG_100
·COFFEE VALVE ·
In Stock Next Day Delivery Available
1kg 135x410mm Valve Black Matt Side Gusset Pouch/Bag (100 per pack)
135mm(W) x 410mm(H) + 70mm(G)
£78.33
Excl. VAT
£94.00 incl. VAT
Per pack • 100 units
| Quantity | Excl. VAT (Per Pack) | Incl. VAT (Per Pack) |
|---|---|---|
| 1 Pack | £78.33 | £94.00 |
| 2 Packs | £76.25 | £91.50 |
| 5 Packs | £74.17 | £89.00 |
| 10 Packs | £71.25 | £85.50 |
| 50 Packs | £63.35 | £76.02 |
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Overview
A Black Matt side-gusset bag with a one-way degassing valve, expandable side panels, a centre back seam and no resealable zipper. The bag is supplied flat and expands as it is filled; its lower section can be folded beneath the contents to create a more stable, flat-base-style presentation.
The built-in one-way degassing valve lets carbon dioxide escape from freshly roasted coffee without letting outside air back in, so the bag does not balloon or put pressure on its seals.
The smooth Matt outer finish gives the pack a clean, contemporary and professional appearance. It provides a strong background for printed labels with bold branding, product names, ingredient information, instructions, batch details, barcodes and other required pack information. Choose white matt for a bright, minimal presentation, or black matt for a darker, more premium-looking finish.
With no zip closure across the top, the bag has a full, unrestricted opening once cut or opened. This can make it easier to fill, pour from or scoop from, depending on the product. After filling, the bag is designed to be heat sealed, subject to validation on your equipment and with your product. Once opened, it can be folded and secured with a peg, clip or tin tie for straightforward reclosure.
The bag measuring 135mm(W) x 410mm(H) + 70mm(G) designed to hold approximately 1kg of coffee beans. If you are packing a different product, the actual fill weight or volume may vary depending on its density, shape, particle size, fill level and the headspace required for sealing and presentation.
We recommend ordering a sample to test the bag with your product before purchase or commercial use.
Key features
- One-way degassing valve that releases carbon dioxide from freshly roasted coffee without letting air back in
- Expandable side gussets for increased capacity after filling
- Centre back seam, with no side seams
- No built-in resealable zipper
- Full, unrestricted opening once the pack is opened
- Bottom can be folded to create a flat-base-style presentation
- Generous front and back panels for labels with branding and product information
- Opaque bag that keeps the contents concealed and protected from light
- Heat-sealable subject to validation on your equipment
- Lightweight flexible format supplied flat before filling
- Suitable for food contact applications, subject to suitability checks
- Next-day delivery available on eligible stocked orders
Why choose a side gusset bag?
Choose a side-gusset bag without a resealable zipper when you need a simple shelf-ready coffee pack. Without a zip sitting across the bag opening, customers can access the contents more easily for pouring, dispensing or scooping. This can be particularly useful for larger pack sizes, refill products and dry goods where a wide opening makes the product easier to use.
The expandable side gussets allow the bag to increase in capacity as it is filled, while the centre back seam leaves clean front and back panels available for labels and branding. Once packed, the lower section can be folded underneath to help create a more stable, flat-base-style format for shelf, counter or cupboard storage.
Although the bag does not include a built-in reclosure feature, it can be folded and secured after opening with a peg, clip or tin tie. This makes it a practical choice where a zip closure is not required, or where the priority is an unrestricted opening rather than repeat zip-lock access.
Looking for a matt pouch with a resealable zipper? View our Matt Pouches pouches.
Uses
What can I pack in it?
Suitable ambient food categories
The final migration report supports use for food packaging across dry, aqueous, acidic and fatty food categories under the stated test conditions and ambient-storage basis. The report identifies the tested bag as BOPP+VMPET structure with a PE food-contact material.
Suitable examples include:
This bag is designed first and foremost for coffee. Freshly roasted coffee releases carbon dioxide for days after roasting, and the one-way valve lets that gas escape without letting air back in.
- Freshly roasted whole coffee beans
- Freshly ground coffee, including filter, cafetière and espresso grinds
- Speciality, single-origin and micro-lot coffees
- House blends and espresso blends
- Decaffeinated coffee beans and ground coffee
- Light, medium and dark roasts — darker roasts typically release gas more quickly
- Coffee subscription, wholesale and retail packs
- Cold brew coffee grounds and brew packs
If your product does not release gas, you do not need a valve — view our Side Gusset Bag. Please do not use a valve bag for fine powders such as instant coffee or cocoa powder, which do not need a valve and could enter or block it.
Suitable for packaging of dry, aqueous, acidic and fatty foods within the conditions tested in SGS. For curry, sauce, chilled or frozen-food applications, suitability must be checked by you for the specific filling temperature, product formulation, storage duration and process conditions. Not intended for baby food, hot-fill, pasteurisation, retort, boil-in-bag, oven or microwave use unless separately confirmed.
Not suitable
This bag is not suitable for the following uses. Contact Rightpak before purchasing or using the bag for any of these applications:
- Hot-fill products, Microwave applications, Oven applications, Retort processing, Boil-in-bag sous vide applications, Steam sterilisation
- Medical devices, Pharmaceutical products, Sterile barrier packaging, Clinical, diagnostic or laboratory applications
- Baby food or infant nutrition products
- Corrosive, flammable, oxidising, toxic or hazardous chemicals
- Agricultural chemicals, pesticides, fertilisers or herbicides
- Liquids, powders fine enough to enter the valve, or products that could block or contaminate the valve
This is not an exhaustive list. If your application is unusual, technical, regulated, temperature-sensitive, chemically active, high-value or safety-critical, check compatibility before ordering.
Product suitability and testingYou are responsible for ensuring that this bag is compatible with and suitable for your intended product before purchase or use. You should carry out your own checks and testing using your specific contents and packaging process, including fill weight, filling method, heat-sealing equipment and settings, storage conditions, transport conditions, temperature exposure and intended end use.
Product descriptions, suggested uses, and capacity guidance are provided for general information only and do not guarantee suitability for every application. If you are unsure whether this bag is right for your product, please request a sample and contact Rightpak before placing an order or using the packaging.
Capacity guidance
This size is commonly described as a 1kg side gusset bag based on the contents being coffee beans, but the actual weight it will hold depends on your product’s bulk density, particle size, shape, product settling, required headspace and seal area.
For example, the same weight of salt or sugar, whole coffee beans and light popcorn will occupy very different volumes. You also need to allow headspace for a clean seal, which reduces the usable fill.
Heat sealing
This bag is intended to be heat sealed closed. Actual seal settings and performance depend on your sealer, temperature, dwell time, pressure, product contamination in the seal area, bag handling and production environment.
Please order a sample and validate sealing performance using your own equipment and filled product before proceeding with a larger order or commercial launch.
FAQs
Will this bag hold 1kg of my product?
This bag is designed to hold approximately 1kg of coffee beans. Other products may occupy more or less space depending on their density, shape and particle size. We recommend testing a sample with your own product before ordering in volume.
For guidance on bag size, see our size chart, which suggests suitable bag sizes using examples including pick-and-mix sweets, protein powder and sugar or salt. This provides a useful starting point for comparing products with different densities and forms.
What are the dimensions of this bag?
The bag measures 135mm(W) x 410mm(H) + 70mm(G), Width x Height + Total Bottom Gusset.
What does the degassing valve do?
Freshly roasted coffee releases carbon dioxide. The one-way valve lets that gas escape from the bag but does not let outside air back in, so the bag does not balloon or put pressure on its seals.
Do I need a valve?
If you are packing whole coffee beans, especially freshly roasted, a degassing valve is strongly recommended. Without one, the gas builds up, the bag balloons, and it can eventually burst or force a seal open. For products that do not release gas, such as tea, granola or confectionery, a valve is not needed — view our Side Gusset Bag.
Can I put a label over the valve?
No. A label, sticker or stamp over the valve stops it releasing gas. Please position labels clear of the valve.
Does the valve keep my coffee fresh?
The valve lets gas out and restricts air getting in, which supports your coffee as it degasses. It does not make the bag airtight or guarantee a particular shelf life. Freshness also depends on your roast, packing process, storage and how the bag is resealed after opening, so please validate this with your own coffee.
Should I wait before packing freshly roasted coffee?
That is down to your roast and your own practice. Roast level, bean type and resting time all affect how much gas is released. Please test a filled, sealed sample over several days to confirm the bag does not inflate.
How does the bag seal?
The bag is designed to be heat sealed initially, and if contents are left within the bag, it can be folded and secured after opening with a peg, clip or tin tie.
Is this bag opaque?
Yes. The bag is opaque, keeping the contents concealed and protected from light.
Is this bag recyclable?
No, this bag is not recyclable. It is constructed from multiple layers which cannot be separated for conventional recycling. If you need a recyclable alternative, please view our Recyclable Pouches stand up pouches.
Is this bag compostable or biodegradable?
No. It is neither compostable nor biodegradable. Please do not describe or label it as compostable, biodegradable or home compostable.
Can I heat seal this bag?
The bag is designed to be heat sealed. Seal settings and results depend on your equipment, product, temperature, dwell time, pressure and production conditions. Please test the bag with your product before commercial use.
Is this bag suitable for food packaging?
Food-contact suitability must be confirmed for the exact bag construction and your intended application. Please request the relevant technical specification and, where applicable, food-contact documentation before ordering or using the bag.
Can I use this bag for hot products or liquid products?
No general hot-fill or liquid-product claim is made for this bag. Please contact Rightpak before using it with hot, warm, wet, liquid, acidic, oily or other specialist products.
How many bags do I receive?
Products are sold in multiples of 100 bags and may be supplied in more than one inner bag or carton for safe handling and delivery.
Is there a minimum order quantity?
Yes. The minimum order quantity for ready-made stock bags/pouches is 100 bags/pouches, excluding fully customised bags/pouches.
Stock bags/pouches are sold in multiples of 100, so you can order 100, 200, 300, 400 bags/pouches and above. Fully customised bags/pouches are subject to separate minimum order quantities.
How do bulk-buy discounts work?
Bulk-buy discounts apply when you order larger quantities of the same product and SKU. Different products, sizes, colours or formats cannot be combined to qualify for a quantity discount.
Can these bags be printed on?
We would advise against it, and we do not offer it. Applying ink and heat to a finished bag can affect the inner food-contact layer and risks migration, so the bag may no longer be suitable for food use. Once a bag has been over-printed after manufacture, it can no longer be relied upon as suitable for food contact, and our technical and food-contact documentation no longer applies to it.
Custom printed bags/pouches work differently. The design is printed as part of the manufacturing process, before the bag/pouch is laminated and formed, so the print is sealed within the structure, and the food-contact layer is unaffected. Get In Touch with us discuss custom printed bags/pouches or Get a Quote.
What is the difference between stock bags/pouches and custom printed bags/pouches?
Stock bags/pouches are ready-made, held in stock and supplied unprinted, so you add your own labels. Minimum order quantity is 100 bags/pouches.
Custom printed bags/pouches are manufactured to order with your design printed into the bag/pouch during production, rather than applied afterwards. You choose the size, material, finish and features, and the print covers the full bag/pouch. Minimum order quantities and lead times apply, and we will guide you through artwork requirements.
If you would like your branding on a stock bag/pouch in the meantime, labels are the right route, and many of our customers start there before moving to custom printed bags/pouches as volumes grow.
Are technical and compliance documents available?
Relevant documents may be available for approved business customers. Request access before ordering or using the bag/pouch where your application requires food-contact, technical, regulatory or quality approval.
Product Specifications
| Specification | Detail |
|---|---|
| SKU | VSG-BM1KG_100 |
| Product Type | Coffee Valve |
| Dimensions | 135mm(W) x 410mm(H) + 70mm(G) |
| Pack Size | 100 units per pack |
| Minimum Order | 1 pack (100 units) |
| Colour | Black |
| Finish | Matt |
| Material structure | 25 MATT BOPP+12 VMPET+105PE |
| Thickness | 145µm |
| Resealable | No |
| Tear Notch | No |
| Corner shape | Square |
| Heat sealable | Yes |
| With degassing valve | Yes |
| Suitable for food contact | Yes (Refer to DOC) |
| Dimension tolerance | Dimensions may vary +/-2mm |
| Capacity | Approx 1Kg (based on whole bean coffee) |
| Product category | Side gusset with expandable sides and bottom gusset |
Custom Printing
Turn this pouch into your own branded packaging. We print in-house with low minimums and a free artwork check — so you can get to market fast without over-ordering.
From 1,000 unitsLow digital-print MOQ
Full-colour printUp to 8 spot colours
Matt, gloss & moreChoice of finishes
~10 working daysIndicative turnaround
Free artwork checkWe proof before print
Food-grade materialsFDA & EU compliant
Samples
Add a sample to your basket and test the pouch with your own product before placing a larger order. Checking a sample helps you confirm the fill level, product fit, shelf presentation, resealable closure and heat-sealing performance on your equipment.
Please ensure the pouch is suitable for your specific contents, filling process, storage conditions and intended use before purchase or production use. If you are unsure, contact Rightpak for guidance or request the relevant technical and compliance documentation.
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Tags: Valve Black Matt, Side Gusset Pouch, Heat Sealable, Expanding Side Gussets, 135x410, 135x410+70mm, 1kg, , 4688
