When we order black printed zipper bags for wholesale, we need a complete specification for the bag and the print. This includes the dimensions and thickness of the bag, the position of the zip, the logo or print and how the bags shall be packed into cartons. We like to approve all of these points at the same time, so that the finished bag looks good when closed, and the print is still visible after packing.
Hualei provides a full range of zipper bags of different sizes, such as 14 x 20 cm, 18 x 25 cm, 24 x 30 cm, 30 x 35 cm, 35 x 40 cm, 40 x 45 cm, 45 x 50 cm and 50 x 60 cm. The thickness of the bags can vary from 50 to 90 microns. Custom printed logos, branding and warning text can be supplied. The MOQ for these bags is 20,000 pieces. These bags are suitable for T-shirts, jeans, underwear, slippers, footwear, accessories, retail stores and e-commerce packaging.
Quick checklist for a zipper bag quote
- Measure the folded product including inserts, labels, etc. and pack thickness.
- Choose from listed sizes or create your own custom finished drawing.
- 50 to 90 micron film– dependent on product weight, edge profile and general handling.
- Black prints should be stored away from the zipper track and main viewing area.
- The final approved version of the warning text must be sent and not the draft version.
- Zipper engagement, print registration and carton closure to be checked using a full carton.
How to choose a finished size
Measure the packed garment
All of these need to be folded in the same manner as the rest of the production. The sizes are listed from smallest to largest: 14 x 20 cm, 18 x 25 cm, 20 x 25 cm, 20 x 30 cm, 25 x 30 cm, 25 x 35 cm, 25 x 37 cm, 28 x 38 cm, 30 x 35 cm, 30 x 40 cm, 32 x 44 cm, 35 x 45 cm, 40 x 50 cm, 40 x 60 cm, 45 x 60 cm, 45 x 65 cm, 50 x 60 cm.
To ensure that an item packed within a parcel will pass through the zipper opening of the parcel without rubbing or becoming bunched up within the pack, the packed item must be of sufficient dimensions. Once the pack is closed the items within the pack must remain flat so that any text on the pack can be clearly read. Items such as jeans/footwear require a little more height and insertion clearance than say underwear/lightweight T-shirt.
Keep the zipper area clear
The full height of the bag is not available as effective print space as there needs to be sufficient room for the zip track to operate and for the material above the zip track to be able to grip. Clearly mark the effective internal length of the bag and the print safe area on the factory drawing.
How to select 50 to 90 micron film
Start with the packed weight and edge risk
Hualei retail cash registers are equipped with 50, 55, 60, 65, 70, 75, 80, 85 and 90 micron gauges. Light weight apparel is normally opened with a lower gauge. Denim, shoes, hard accessories and frequent opening require higher gauges.
Measuring the film thickness does not guarantee any performance. The film must be tested on the zipper ends, on the corners, and on any hard product edges. A 60-micron film, designed as a bag of correct size for the intended application, will outperform a 90-micron film of oversize bags. The item will move inside the oversized bag and will strike the seals.
Check the feel after printing
Black ink changes the way a clear bag looks and may make the printed area feel different. Approve the film and print together, especially when a large warning block or brand panel covers much of the surface.
How to plan black printing
Separate branding from required information
Black text can be printed for logos, product names, care notes, warnings and use instructions. Each item should be printed in a specific position on the garment and the most important text printed away from seams, zip, folds and the darkest part of the garment.
Lock the final warning text before production
Where a bag requires a warning notice then the wording for such notice must be supplied by the buyer for the required market and usage as approved copy which will need to be translated into all languages used, printed at the minimum size and positioned as shown.
Print out a full-size test of the text on an empty clear bag. Then test the bag with the garment in it. Black text that looks great on the empty clear bag may not read well over dark denim or printed T-shirts.
What to test in the zipper closure
Open and close a sample several times as a packer or customer would. The track should grab the opposite track over the full width of the track without twisting. Check both ends of the sample as local stress tends to occur at the ends of the zipper.
Fill the bag, close it up and stack up the bags in cartons. After the test open up the bag again to look for film whitening, stretch, print rub and zipper separation. For more information on the structure of a zipper bag please refer to the zipper bag specification guide.
How to create a print safe zone for black text
Start with your finished bag drawing and do not work with a rectangular box. Include in your drawing the zipper track and material above the zipper, the side seals and bottom seals and the space where the packed garment will sit. The space left over from this area is your working print area. Ensure that your logo and warning text are contained within this area. Also, be aware that small characters can become unreadable when printed in the corners of a seal. This is due to variation in seal and product movement.
Use the darkest garment in your range to check contrast against a black message. A black message will read well on a light-colored T-shirt but will almost disappear on dark denim. If your product is to be the background to your message, try to place the message in light areas of product or re-work the artwork so that it will read with sufficient contrast against the background. Show the factory sample printed on the specific film that will be used for production of your garment.
Check the empty and filled bag. In the empty bag the front and back print could cover each other in some places in the transparent film. In the filled bag the folds and garment edges could break a line of text. Check the printed sample – flat, filled, zipped and stacked – against the other packs. Only approve the exact artwork revision after you have checked all four views against the printed samples.
How to manage several sizes under one order
Create a specification table for all product types. For folded articles like T-Shirts and Underwear this could outline the dimensions of the folded articles, the bag size, film gauge, position of zip etc. The print version and the quantity to be packed and the number of cartons required for each garment type would also need to be included in the table. Note that items such as Jeans, Slippers and Footwear will have different clearance requirements and possibly need to be packaged with a heavier gauge film. Check out how the garments actually pack.
The MOQ listed is 20,000 pieces. However, the supplied information does not specify whether sizes and/or variations of artwork can be included within the MOQ quantity. It would be helpful for the manufacturer to indicate how the quoted MOQ would be allocated within a quotation for, for example, a four-size order with one logo versus one size with four warning languages.
By reducing product sizes down to single stockholding sizes a balance can be reached between attempting to manage inventory and achieving a good pack fit. However, by taking this approach a number of potential problems could arise, such as product becoming a loose pack, increased product movement and poor print placement. Use your filled trial as a means to establish whether or not you can stock a particular product as a single size or whether it is required to be packed in a separate bag.
Build the inspection checklist before production
Use the signed preproduction sample as your visual and functional reference. Check dimensions, gauge, zip placement, opening width, side and bottom seal to reference sample. Check print placement, all content on print and text, contrast and cleanliness of all surfaces as well as packaging within the carton. Open and close samples from more than one carton, then test putting garments in the samples.
It is wise to require the supplier to work from a separate document for reproducing warning texts, outlining the approved text, languages, line breaks and minimum font sizes, as well as any other required artwork changes. Verify the special requirements for the respective markets for which a product is intended and how the product will be used.
When re-running the same sample, list all the changes that have been made to the signed sample. Note that changes to the folding of the sample will mean that any printed message will now be on the inside of the product. Repeat the approval process for any changes to product, warning text, size, weight or artwork of the completed sample.
What to confirm with the manufacturer
Send finished size, usable internal size, thickness, resin or film requirement if specified, zipper type, black print artwork, warning copy, quantity by size, carton plan, destination, and target arrival date. Hualei’s supplied information gives a 20,000-piece MOQ and a typical 10 to 15 business day lead time depending on volume and customization. Confirm both figures for the final order.
Check a printed filled sample for Zipper alignment, Print position, Text contrast, Tear resistance, Odor, Surface cleanliness and Carton compression. Keep 1 signed sample from the incoming inspection for repeat orders.
Conclusion
Black printed zipper bags wholesale orders should begin with the folded product and end with a signed filled sample. Hualei’s size range from 14 x 20 cm to 50 x 60 cm and 50 to 90 micron options cover light apparel through heavier retail packs. The 20,000-piece MOQ makes artwork and size approval especially important: confirm the zipper, black print, warning copy, and carton setup before production starts.
FAQ
What sizes are available for black printed zipper bags?
Hualei’s zipper bags are available in 17 standard sizes, ranging from 14 x 20 cm to 50 x 60 cm, with custom sizes available upon request.
What thickness should a clothing zipper bag use?
We can select weight, sharpness of edges, degree of opening and distribution of holes for you within the listed range of 50-90 microns. The selection can be verified by a filled test.
Can warning text and a logo be printed together?
Yes. The information given by Hualei regarding custom logos, your brand, any warning messages and product information must be separated into individual zones and all text approved prior to print.
What is the MOQ and lead time?
The supplied product information lists an MOQ of 20,000 bags and a typical lead time of 10 to 15 business days depending on quantity and customization. Confirm current terms with the final artwork and delivery plan.