How to Safely Test and Store Refurbished Epson R1390 Printheads Without Causing Internal Damage

Question:
I've been helping customers in Italy with Epson R1390 printers and recently purchased several refurbished printheads from Alibaba to resell. I want to test them safely and store them long-term (6-12 months). I used a syringe with a rubber tube to gently flush cleaning fluid and distilled water through the heads before installing them. One head worked perfectly, but another started leaking black ink internally, suggesting a membrane failure. Did I damage it with the syringe, or are these refurbished heads just fragile? What's the correct way to test and store them?

Answer:
What Likely Happened to Your Printhead

Based on your description, you didn't necessarily do anything "wrong" in terms of technique-your approach was actually careful and methodical. However, the key issue lies in the quality of refurbished printheads from low-cost sources like Alibaba.

Many of these ~$100 printheads fall into the lowest grade of refurbishment, and here's what that typically means:

• They often use inferior adhesives (glue) to reseal internal layers.

• The internal membrane structure (ink chamber partitions) is already weakened.

• They may pass a basic printing test, which is why sellers claim they are "working."

• However, they are not designed to withstand any reverse pressure, even very gentle syringe flushing.

When you used the syringe-even VERY gently-you introduced positive pressure into the ink chambers, which these heads are often unable to tolerate. As a result:

• The internal seal between ink channels (e.g., black vs. color) can rupture.

• This leads to cross-contamination or sideways leakage, exactly as you observed.

• Once this happens, the printhead is permanently damaged and cannot be repaired.

Why Syringe Flushing is Risky for Refurbished Heads

Even though syringe flushing is a common technique, it assumes that the printhead:

• Has intact internal seals

• Was rebuilt using OEM-grade materials

• Can handle controlled pressure

Unfortunately, with low-cost refurbished heads:

• The glue holding layers together is often weak

• Internal layers can delaminate under minimal stress

• Even a slight push can separate the nozzle plate or internal membranes

So yes-it is normal for these types of printheads to fail under syringe pressure, even if you were extremely careful.

Recommended Testing Method (Safer Approach)

For lower-grade refurbished printheads, avoid syringe flushing entirely. Instead:

1. Install the printhead directly into the printer

2. Use dampers filled with cleaning solution or distilled water

3. Perform 1-2 gentle head cleanings via the printer

4. Run a nozzle check

5. If the pattern is acceptable, proceed with light use

This method avoids applying direct pressure and uses the printer's controlled vacuum system, which is much safer.

Recommended Storage Method (6-12 Months)

Once tested, here's a safer way to store them:

1. Do NOT flush with a syringe again

2. Perform a final cleaning cycle using moisturizing solution (via dampers)

3. Remove the printhead and:

   • Cap the ink inlets (or use dampers left attached)

   • Wrap the printhead in a lint-free cloth lightly dampened with moisturizing solution

4. Place it in an airtight sealed bag

5. Store in a cool, dark environment (avoid temperature extremes)

Reality of Low-Cost Refurbished Printheads

To be very direct:

Printheads sold at around $100 are typically:

• Heavily used units with cosmetic or internal wear

• Possibly containing scratches or partially degraded nozzles

• Only semi-functional, not suitable for long-term reliability

If these heads were high quality, suppliers would:

• Sell them to industrial DTF manufacturers

• Supply repair shops at higher prices

Instead, they are sold cheaply to consumers with the expectation that:

• Buyers may not test them thoroughly

• Return processes are difficult or unsuccessful

What You Can Do Moving Forward

• Avoid syringe flushing on unknown-quality printheads

• Test using printer-based cleaning only

• Expect a higher failure rate with low-cost inventory

• If a unit fails, unfortunately, there is no recovery method

Regarding returns, many users experience difficulty. If the product is clearly defective, you may consider pursuing a chargeback through your payment provider, as refund disputes can become complicated.

Addressing printer issues can be a complicated affair due to the hands-on nature of the problems. So, we're not able to provide remote troubleshooting, suggestions, or support for printer repairs. We do offer an in-person evaluation and repair service via our local diagnostic facility (https://bchtechnologies.com/printer-repair-service [https://bchtechnologies.com/printer-repair-service]). Due to high demand, we operate on a first-come, first-served basis, and it may take a few weeks before we can accept new drop-offs. Our services are designed to repair either complete printers or specific components, with clear guidance throughout the process. However, we understand that our rates may not be the most economical option.

For that reason, we strongly recommend exploring self-help resources. A great place to start is YouTube or our channel homepage (https://youtube.com/@bchtechnologies [https://youtube.com/@bchtechnologies]). Use the search icon next to the "About" section on the right-hand side to find videos on specific topics. Since we've created content over the past nine years, it's the fastest way to locate relevant guides. YouTube may also suggest helpful videos from other creators.

Thanks again for your thoughtful question and for the work you're doing to help others with their printers. Your attention to detail is excellent-this is simply one of those situations where the product quality limits the outcome.