Biodegradable Mailers: How to Choose the Right One

Biodegradable Mailers: How to Choose Without Guesswork

I’ve spent enough time around packing lines in Newark, Edison, and the garment district warehouses outside Los Angeles to know that “eco-friendly” can mean almost anything in a sales deck and very little once the cartons start moving. I’ve watched mailers hold up beautifully in a sample room, then split at the seam after one wet delivery route, one sharp zipper pull, or one careless cart bump in a busy warehouse. That’s why biodegradable mailers how to choose is not a feel-good sustainability exercise; it’s a packaging decision tied directly to cost, damage rates, and customer trust, often measured down to the penny per unit and the percentage point on returns.

I remember standing beside a conveyor in a facility outside Newark, watching a stack of supposedly premium mailers get rejected because the seal area had been printed too heavily with a 4-color flood on a 70-micron film. The operator gave me that look — the one that says, “Well, the brochure didn’t mention this part.” Honestly, I think that’s the root of the whole problem. A mailer can be sold as biodegradable and still do next to nothing in a landfill, where oxygen is scarce and decomposition slows to a crawl. Some materials only break down under industrial composting conditions, which means heat, moisture, and microbial activity all need to be present at the same time. In many facilities, that means 55°C to 60°C for roughly 30 to 90 days, depending on the resin blend and the certification standard. If those conditions never appear, the claim may be technically accurate in a controlled test and practically useless in the disposal stream your customers actually use. That gap matters more than most brands realize.

In plain terms, biodegradable mailers are shipping bags made from materials that decompose through biological action over time. The label gets messy quickly. Compostable usually means the material is engineered to break down into non-toxic components under defined composting conditions. Recyclable means the item can enter a recycling stream, provided that stream accepts it. Oxo-degradable materials belong in a different bucket altogether; they often fragment into smaller pieces rather than fully biodegrading, which is why many packaging teams treat them with caution. Brands get burned most often when they buy the label instead of the science, and I’ve seen more than one team discover that after the purchase order was already signed for 10,000 units in a Ningbo sourcing call that seemed perfectly calm right up until the compliance questions started.

On a fulfillment floor in New Jersey, I watched a team move to an eco-branded mailer that looked sharp in photos but split at the side seam on heavier orders. They were shipping knitwear, each parcel about 1.2 kg, and the failure rate hit 4.8% in the first month across 3,000 shipments. That meant double packing, extra labor, and more customer complaints than they’d seen with their old poly mailer. The lesson was blunt: biodegradable mailers how to choose has to begin with the route, the product, and the disposal reality, not with a green slogan or a clever mockup approved in a 15-minute design review.

Four questions carry more weight than any product photo. How heavy is the item? How much moisture will it face? How far will it travel? Where is the customer likely to discard the mailer? Those answers tell you more than the marketing copy ever will. If you’re comparing Custom Packaging Products for a new launch, that is the filter I’d use before anything else, whether you’re shipping from a warehouse in Dallas, a 3PL in Atlanta, or a boutique fulfillment center in the Bay Area.

Decision framework in one sentence: the best biodegradable mailer is the one that survives shipping, matches your sustainability claim, and has a realistic end-of-life path for your customer base, with a cost structure you can defend at $0.15 to $0.28 per unit depending on quantity, print coverage, and freight.

How Biodegradable Mailers Work

Most biodegradable mailers use some combination of plant-based or degradable polymers. The names that show up often are PLA, PBAT, starch blends, and other biopolymer formulations. PLA, or polylactic acid, usually comes from corn starch or sugarcane feedstocks. PBAT, short for polybutylene adipate terephthalate, is a fossil-based but biodegradable polymer that is often blended in for flexibility and toughness. Starch-based films can also appear in the structure, usually to reduce dependence on conventional plastic. On paper, the chemistry looks tidy. In production, the formula is always a balancing act, and sometimes a very stubborn one, especially on extrusion lines in Guangdong or Jiangsu where a 1% shift in blend ratio can change seal performance enough to trigger a re-run of the test batch.

Breakdown depends on several conditions working together: microbes, oxygen, moisture, heat, and time. Remove one of those and degradation slows. Remove several and it can stall almost entirely. That is why industrial composting is not the same as tossing a mailer into a backyard compost bin and hoping for the best. Most industrial composting facilities hold materials around 55°C to 60°C, with controlled aeration and humidity. Backyard systems vary far more, which means a material approved for one environment may behave very differently in another, especially in cooler regions like the Pacific Northwest where pile temperatures may never hold above 40°C long enough to complete the cycle.

I once reviewed a spec package with a brand manager who assumed “biodegradable” meant “will disappear anywhere.” That assumption cost them six weeks of sourcing back-and-forth on a 25,000-unit order because the supplier’s data sheet showed compostability only under commercial composting conditions, and the client’s customers were mostly suburban households with no access to that infrastructure. The mailer was technically compliant and strategically wrong, which happens more often than people like to admit. I wish I could say that was unusual. It isn’t, especially when the item ships through a regional distribution network in Ohio or Texas but lands in markets where municipal composting is practically nonexistent.

Certification matters more than the adjective. If a supplier says a mailer is compostable, ask whether it meets ASTM D6400, ASTM D6868, EN 13432, or another recognized standard. For packaging claims, third-party validation separates marketing language from something you can defend in a customer complaint, a retailer review, or an audit. The U.S. EPA has useful guidance on organics and composting systems, and it’s a good place to sanity-check claims: EPA recycling and composting resources.

Thickness and additive load matter too. A very thick mailer, especially one loaded with inks, opacifiers, barrier coatings, or mixed laminations, can slow decomposition sharply. I’ve seen a 70-micron structure outperform a 90-micron structure in one test because the first had a cleaner blend and fewer print layers. The procurement team found that surprising, though it shouldn’t have been. The more complex the build, the harder it is for microbes to access the polymer chains, and the harder it is for a factory in Shandong to keep the seal jaw temperature consistent across a 12-hour shift.

There’s a practical design truth many buyers overlook: the better a mailer protects the product, the harder it can be to break down. That doesn’t mean durability and biodegradability are enemies. It means the balance has to be chosen with care. A mailer for cotton T-shirts can behave very differently from one shipping metal accessories or boxed cosmetics. If your comparison set includes Custom Poly Mailers, judge them against biodegradable options on actual shipping performance, not ideology, and not just on a sample that arrived flat and perfect from a factory in Shenzhen.

For brands using FSC-certified paper components, that can support the fiber side of the package, but it does not automatically make the entire mailer compostable or biodegradable. FSC speaks to responsible forest management, not decomposition performance. More than one client has mixed those claims up, and I get why — packaging jargon can sound like it was invented to make smart people squint. The distinction matters, especially when the package includes mixed substrates or adhesive systems. You can verify certification basics through the Forest Stewardship Council here: FSC certification standards.

Key Factors to Compare Before You Buy

When I help a brand narrow options, I use a simple scoring sheet with five columns: material, performance, compliance, branding, and landed cost. Biodegradable mailers how to choose gets far easier once you stop asking, “Which one is greenest?” and start asking, “Which one performs across the full supply chain?” That shift saves time and a fair amount of regret, especially if your inbound quote from Ho Chi Minh City includes shipping but not duties, or if your sample approval in 2024 turns into a 2025 replenishment at a different resin price.

Material composition is the first filter. Plant-based films can reduce dependence on virgin petrochemicals, but they are not all equal. A PLA-heavy mailer may be stiffer and more brittle than a PBAT-rich blend. A starch-heavy structure may feel softer but lose toughness in humid storage. Mixed-material mailers can offer better functionality, though they complicate end-of-life processing. If your brand’s priority is industrial composting, the material stack has to be designed for that path. If your goal is lower-impact packaging with practical shipping durability, a recyclable option may outperform a flimsy biodegradable one every time, especially for items packed at 500 to 1,000 units per day on a busy line in Chicago or Miami.

Strength and puncture resistance should be tested against the actual contents. Apparel is one thing. Hair accessories with hard clips are another. A 60-micron mailer may be perfectly adequate for soft goods, but not for a boxed serum with a rigid edge. In one supplier negotiation I sat through, the buyer pushed for the thinnest possible material to save $0.03 per unit on a 5,000-piece order. Two weeks of transit tests later, the damaged-order cost wiped out that saving ten times over. Tiny unit price gains can mislead, and they have a sneaky habit of coming back to bite you later.

Barrier performance matters more than many teams expect. If a shipment passes through humid regions, rainy delivery routes, or multi-stop sortation hubs, moisture resistance and seal integrity become non-negotiable. A mailer that swells, softens, or opens at the flap creates returns, replacements, and a customer service headache. For ecommerce apparel, I’d rather see a slightly thicker structure with a reliable seal than a fragile “green” option that can’t survive a wet porch in Seattle, Boston, or Atlanta during a July thunderstorm.

Certifications and claims are where diligence pays off. Ask for third-party proof. Ask for the exact test standard. Ask whether the certification applies to the full finished mailer or only the base resin. That last point is easy to miss. Printing inks, adhesives, and closures can change the claim. If a supplier cannot explain the full bill of materials on one clean page, keep asking. Careful buyers win in this part of the process, especially when a supplier in Xiamen or Dongguan offers a beautiful quote sheet but leaves the test report in a separate attachment nobody opened.

Cost and pricing should be measured as total landed cost, not sticker price. A biodegradable mailer might quote at $0.18/unit for 5,000 pieces, while a conventional poly mailer sits at $0.09/unit. That looks like a clean comparison until you add custom print, freight, duties, damage rates, and customer response. If the biodegradable option lowers damage, improves repeat purchase sentiment, and supports a retailer sustainability requirement, the premium may be justified. If it only looks good in a presentation, maybe not. A quote of $0.15 per unit for 5,000 pieces can still land closer to $0.21 once you add a printed return address, a matte finish, and ocean freight from Ningbo.

Branding and print quality are the final filter. High-coverage graphics, dark inks, metallic finishes, and complex varnishes can complicate compostability claims and raise cost. I’ve seen brands spend $1,200 on a glossy print setup only to discover that a simpler one-color design would have tested better and cost less. If the mailer is part of a premium unboxing moment, keep the graphics sharp but restrained. A 2-color print on a matte surface often reads cleaner than a busy, high-gloss design anyway, especially on a 350gsm C1S artboard insert paired with a softer mailer exterior.

Option	Typical Unit Cost	Strength	Best For	End-of-Life Path
PLA/PBAT biodegradable mailer	$0.16-$0.28 at 5,000 units	Medium to high	Apparel, soft goods, ecommerce subscriptions	Industrial composting, if certified
Starch-blend compostable mailer	$0.14-$0.24 at 5,000 units	Medium	Lightweight products, lower-abuse routes	Industrial composting, depending on certification
Recycled poly mailer	$0.08-$0.16 at 5,000 units	High	General ecommerce, long-haul shipping	Recycling streams where accepted
Paper mailer with barrier layer	$0.20-$0.35 at 5,000 units	Medium	Retail-facing branding, lower moisture risk	Fiber recycling or composting, depending on construction

That table is a starting point, not a verdict. A $0.14 mailer can become a $0.23 mailer after print, custom sizing, and freight. A “cheaper” option can also become more expensive if it triggers returns or repackaging. Procurement teams have learned that lesson the hard way more than once, especially when a factory in Guangzhou quotes one FOB price and the final delivered cost into Los Angeles or New York is a different number altogether.

Biodegradable Mailers How to Choose Step by Step

Here’s the process I recommend when a brand wants a smart, defensible decision. It sounds methodical because it should be. Biodegradable mailers how to choose becomes manageable once you separate shipping requirements from sustainability preferences and then put the two back together with data, sample testing, and a real quote that includes freight, print, and overage allowances.

1. Identify the shipping profile. Start with product weight, dimensions, edge sharpness, and exposure risk. A 300-gram apparel item and an 800-gram skincare bundle should not share the same mailer spec unless the test data says they can. A pair of folded leggings packed in Austin is not the same as a boxed face oil shipped through Phoenix in August.
2. Decide the disposal outcome you want to support. Home composting, industrial composting, or a lower-impact alternative? These are not interchangeable. If the customer base doesn’t have compost access, the claim needs a reality check, especially if your orders ship into suburban ZIP codes where curbside organics pickup is still limited.
3. Shortlist constructions and request documents. Ask for spec sheets, thickness in microns, seal type, tensile strength, puncture resistance, and certification proof. Do not accept a sales sheet alone. A proper supplier packet from a plant in Dongguan or Suzhou should include the resin blend, the finished gauge, and the test standard in plain text.
4. Test with real products. Load the mailer with actual items, run drop tests, and ship through real routes. Empty mailers can fool you. Full ones tell the truth. If you ship 2 kg bundles to Colorado in winter, test those conditions, not a desk-side mockup.
5. Compare total cost and lead time side by side. A better-performing mailer that arrives in 18 days may beat a cheaper one that takes 35 days and causes stockouts. Missed sales count as a cost too. In one replenishment cycle I reviewed, a 12-day delay wiped out the savings from a $0.02 lower unit price.

In a client meeting last year, a skincare brand wanted a biodegradable mailer for a set of glass jars. Their first instinct was to go thin to cut costs. We tested three constructions: 45-micron, 60-micron, and 70-micron. The 45-micron version failed at the corner seam after two drops from 1 meter. The 60-micron version held, but showed abrasion on the print. The 70-micron version passed the test and looked the cleanest after route simulation. They chose the 70-micron option even though it cost $0.05 more per unit on a 5,000-piece run. That was the right call. The cheaper choice would have cost more later.

Step 1 is always the product. If your product has hard edges, pressure points, or a high chance of puncture, test those exact pain points. Apparel brands often underestimate zipper pulls, metal tags, and folded seams. Subscription brands often overlook inserts and sample sachets. The mailer is not protecting a concept. It is protecting a physical object with geometry, friction, and weight, often packed at a line speed of 300 to 600 orders per hour.

Step 2 is disposal logic. If you want to support composting, tell customers exactly what to do and where. If you want the package to be recyclable, do not mix in components that break that path. If you only want lower-impact material choices, say that clearly instead of overclaiming. Trust is fragile. One confused customer email can undo a month of sustainability messaging, especially if your post-purchase flow sends the wrong disposal instructions.

Step 3 is documentation. Ask for testing against ASTM D6400, ASTM D6868, EN 13432, or relevant local standards. Ask whether the adhesive, ink, and closure are included in the certification scope. Ask for the material data sheet and a sample lot number. If the supplier hesitates, that tells you something useful. A factory in Ningbo that can’t produce the finished-packaging report within 24 hours is telling you to slow down for a reason.

Step 4 is real-world testing. I like three basic checks: seal integrity, drop resistance, and scuffing. If the mailer opens under normal handling, the packaging is not ready. If the print scratches off after one carton transfer, the unboxing experience will feel cheap. If a customer cannot tell how to dispose of it, the sustainability story falls apart at the finish line. A 10-shipment sample from a showroom in Brooklyn is not enough; 50 to 100 real shipments will tell you much more.

Step 5 is total cost. Include freight, customs if applicable, overage, print setup, and failure-related costs. Some buyers also forget storage. A more delicate material may need better warehouse conditions. That can affect inventory handling in summer months when humidity spikes to 70% or higher. That detail sounds minor until a pallet of mailers arrives warped after a 22-day ocean transit from Yantian to Long Beach and sits in a hot cross-dock for 48 hours.

Process, Lead Times, and Cost Realities

Custom biodegradable packaging rarely moves in a straight line. Sampling comes first. Then artwork approval. Then production. Then shipping. Each stage can stretch if the spec changes midstream. I’ve seen a run slip by 12 days because a brand wanted to switch from a plain kraft-look finish to a full-coverage green print after proof approval. The material stayed the same; the timeline did not. Packaging, inconveniently, does not care about marketing enthusiasm, and a factory schedule in Zhejiang is usually set long before the last-minute design tweak arrives.

For a custom order, I usually expect 7 to 10 business days for samples, 10 to 20 business days for production after approval, and another 3 to 12 days for transit depending on origin and destination. Highly customized orders need buffer. Lead times are not guesses; they come from material sourcing, print complexity, and order volume. If a supplier promises an 8-day turnaround on a fully printed biodegradable mailer with non-standard sizing, I’d ask for the plant schedule and freight method before taking the number seriously. In many cases, the more realistic timeline is 12 to 15 business days from proof approval for a standard run and 18 to 25 business days for larger or more complex orders.

Biodegradable mailers usually cost more than conventional poly mailers because the resin blend is specialty-grade, the testing burden is heavier, and the manufacturing window is narrower. You are not only paying for a bag. You are paying for controlled material selection, tighter process management, and sometimes certification work that can run into the low thousands of dollars. For small brands, that premium can sting. For others, it is a reasonable cost of entry into a lower-impact packaging position, especially if the order starts at 3,000 pieces instead of 30,000 and the factory is still charging setup over a smaller base.

How do you know if the premium is worth it? Compare three things: damage rate, customer perception, and operational simplicity. If a mailer costs $0.06 more but cuts damage from 3% to 0.8%, the math may already work. If customers frequently mention packaging in reviews, the brand value can be even greater. And if the packaging reduces the need for secondary dunnage or a return insert, that is one less item to buy, stock, and pack. Cost rarely lives in one line item, and a warehouse in Charlotte or Sacramento can quietly spend the difference in labor within a single month.

There’s another layer people miss: minimum order quantity. A supplier may quote a lovely unit price at 20,000 pieces but a much higher one at 3,000 pieces. If your monthly volume changes, that matters. I’ve negotiated more than one order where a brand saved nothing by chasing a lower piece price and ended up overstocked with 14 months of packaging inventory. Money sitting on a shelf is still money, just less useful, especially when storage in a Dallas warehouse costs $0.12 to $0.18 per cubic foot each month.

If you’re planning a pilot, start with a realistic test batch. I usually recommend 500 to 1,000 units for a small brand, enough to measure shipping performance without tying up too much cash. Then track the actual damage rate, customer comments, and Packaging Cost Per order. Those numbers tell you far more than a supplier presentation ever will. If the pilot ships from Portland to Denver, Miami, and rural Ohio, even better — the route spread will expose weak points quickly.

For teams building out their packaging portfolio, it helps to compare biodegradable mailers with other formats in the same family. A broader review of Custom Packaging Products can show when a mailer is the right answer and when a box, sleeve, or paper envelope might be smarter. The right format usually depends on the product, not the trend, and not the latest sustainability headline out of a trade show in Chicago.

Common Mistakes Brands Make With Biodegradable Mailers

The first mistake is buying on language alone. “Eco,” “earth-friendly,” “green,” and “biodegradable” are not proof. They are adjectives. Biodegradable mailers how to choose should begin with test data, not vocabulary. If the supplier cannot explain the standard, the thickness, and the disposal path, keep looking. A polished quote from a factory in Shenzhen is not the same thing as a valid finished-product test report.

The second mistake is under-specifying strength. A mailer that is too thin may seem financially attractive until the first wave of returns arrives. I saw a fashion brand move from a 60-micron mailer to a 45-micron version to save $0.02 per unit on a 7,500-unit order. Their return-related rework cost rose by $1,900 in a single quarter. That trade-off was avoidable, and the finance team had to explain it line by line.

The third mistake is ignoring disposal instructions. If the package is industrial compostable, say so clearly. If it should not go in curbside recycling, say that too. Confused customers do not create good sustainability outcomes. They create frustration, and frustration gets posted online — sometimes with a photo of the torn mailer and a very unkind caption, usually after a delivery from a distribution center in Atlanta or Indianapolis.

The fourth mistake is forgetting that print and adhesive choices can affect end-of-life claims. Heavy ink coverage, incompatible adhesive strips, and mixed lamination layers can all weaken compostability or recyclability. A well-designed mailer can fail in documentation because of one small closure component. That is why spec sheets matter, and why a 2-mil adhesive strip can matter as much as a 70-micron film.

The fifth mistake is not route-testing. Heat, rain, rough handling, and multi-stop distribution can destroy a package that looks fine in the sample room. I’ve seen a northern route test pass cleanly, then a southern summer route reveal adhesive creep at 34°C. Same mailer. Different environment. Different result. The warehouse manager just stared at me like the climate had personally betrayed him, and frankly, I understood the feeling. A 14-hour truck move through Alabama in August can tell you more than a polished sample board ever will.

“We thought the greener label was enough. After the first damage spike, we realized the packaging had to survive the carrier network first, and impress customers second.” — ecommerce operations manager I worked with on a 9,000-unit pilot

Expert Tips for Better Packaging Decisions

If you want a cleaner decision process, use a weighted scorecard. I usually suggest scoring each candidate mailer from 1 to 5 across four criteria: sustainability claim strength, shipping durability, branding fit, and total cost. Then weight durability and compliance higher than aesthetics. Pretty packaging that fails transit is still a failure, even if the mockup looked excellent under studio lights in a Manhattan photo shoot.

Ask for the material data sheet before you approve anything. Ask whether the product meets ASTM, EN, or local compostability requirements. Ask for finished-packaging testing, not resin-only claims. Ask about seal type, film thickness, and print area coverage. These are not bureaucratic questions. They are the difference between a controlled purchase and an expensive surprise, and they matter just as much on a 2,000-unit launch as they do on a 50,000-unit replenishment.

Do not force one mailer format to fit every SKU. A soft cotton tee, a hardcover notebook, and a boxed cosmetic kit do not need the same solution. If your catalog is diverse, create a packaging matrix by category. That lets you match the mailer to the product instead of asking one material to do everything. In practice, that may mean one 60-micron mailer for apparel, a sturdier paper-based option for books, and a different structure for rigid beauty kits.

Add disposal language on the mailer itself or on a small insert card. Keep it simple: “Commercial composting only where facilities exist” or “Check local recycling guidance before disposal.” That sentence can save your customer service team from a dozen repeat questions. It also makes your sustainability position clearer and more honest, whether you print it on a 90gsm insert card or on the flap of a shipping bag leaving a warehouse in Philadelphia.

Seasonality matters more than many brands expect. A mailer that performs fine in dry spring weather may behave differently in humid August conditions. Shipping lead times can stretch during peak season, too. If your launch is tied to a holiday spike, order early and test in the climate you actually ship through, not the climate you wish you had. A July production slot in Vietnam or Eastern China can move very differently from a January one.

One more practical tip: keep a small archive of approved samples. Save the spec sheet, the printed sample, and the test notes in one folder. When a procurement manager changes or a supplier revises a formula, you’ll have a point of reference. I’ve seen teams lose weeks because no one could find the original approved mailer after a staff transition. A simple archive can save a 4-week chase through email threads, WhatsApp messages, and a very unhelpful shared drive.

My honest take: the best packaging decisions are boring in the best way. They are repeatable, documented, and easy to explain. If a biodegradable mailer sounds impressive but creates confusion in operations or disposal, it is not a win. Simple usually beats clever, and a clean spec approved in 2025 is worth more than a flashy concept board that never made it past the sample table.

Next Steps: Narrow Your Options and Test

Start with a shortlist of three biodegradable mailers that fit your product dimensions, shipping distance, and budget. If you are shipping lightweight apparel, keep one PLA/PBAT option, one starch-blend option, and one comparison against a strong recycled or conventional alternative so you can judge trade-offs fairly. That side-by-side view makes biodegradable mailers how to choose much easier, because the “best” option becomes visible instead of abstract. A three-way comparison from factories in Dongguan, Suzhou, and Ho Chi Minh City can also show how material blends and lead times differ in practice.

Request the same information from every supplier: price at your target quantity, lead time, thickness, material composition, seal type, certifications, and print options. Without that consistency, you are comparing apples to oranges, or worse, apples to packaging claims. I’ve sat through too many sourcing reviews where one supplier’s quote included freight and another’s did not. That is how budgets get distorted, especially when one quote is for $0.15 per unit for 5,000 pieces and another excludes ocean freight, export cartons, and a $180 plate charge.

Run a pilot with real orders. Use at least 50 to 100 actual shipments if you can, and track three numbers closely: damage rate, customer feedback, and Packaging Cost Per order. Add notes about route conditions if your shipments cross humid regions, long-haul routes, or rough carrier networks. A data set that includes those variables is far more useful than a one-time sample test in a conference room. If the pilot covers Chicago, Tampa, and Albuquerque, you’ll learn much faster than from one local route alone.

After the pilot, make the decision with a cool head. If the mailer performed well, scale it. If the size was off, adjust the dimensions. If the material met the sustainability goal but not the damage threshold, do not force it. Switch materials or change the packaging format. There is no prize for staying loyal to a bad specification, and no customer in Minneapolis is going to reward a package that arrives torn just because it was compostable on paper.

One final reminder: biodegradable mailers how to choose comes down to matching claims, performance, and disposal reality. Not the greenest-sounding label. Not the lowest quote. Not the flashiest print. Choose the mailer that holds up in transit, fits the customer’s disposal path, and can stand behind its environmental claims. That is the packaging decision I’d trust, whether the order begins with 3,000 pieces or 30,000 pieces, and whether the factory is in Zhejiang, Guangdong, or a domestic plant in Ohio.