screen printing errors

Screen printing is a creative production method that combines manual labor with technology. However, this method, with its delicate processes, is also quite susceptible to errors. If proper preparation is not done, the resulting print may be problematic. paint spills, screen errors, curtain tension problems or institutional problems Many undesirable situations can arise, such as these.
In this series of articles, we will examine the most common mistakes and their solutions step-by-step, using technical approaches specifically designed for the year 2025.

screen printing errors

1. Mistakes Made During the Mold Making Stage

The most fundamental stage in screen printing is the plate. The more accurately the plate is prepared, the clearer and longer-lasting the print will be. The most common mistakes are:

a) Insufficient or incorrect tulle tension.

If the tulle tension is too low, the pattern will shift during printing; if it's too high, the tulle will tear easily.
📏 Correct ratio: 20–30 N/cm² for textile printing, 30–40 N/cm² for glass and metal surfaces.
To prevent the tulle from loosening over time aluminum pulleys should be preferred.

b) Uneven application of the emulsion layer.

If the emulsion is applied too thickly, details will be lost; if it is applied too thinly, the paint will not adhere properly to the surface.
The ideal number of layers is generally front side 1, back side 2 It is in this form.
In addition, the drying time of the emulsion is average. 20–25 °C And %40 nem It should be in the right environment.
👉 At this point okangokhan.com/serigrafi-ekipmanlari The "drying racks" on the website are one of the most practical solutions for this purpose.

c) Exposure time errors

Overexposure → the pattern hardens, the paint doesn't transfer.
Underexposure → the pattern dissolves and disperses during printing.
Each type of emulsion has a different exposure time.
💡 Recommendation: Along with your UV lamp step wedge Find the ideal duration by performing a (pose test).

screen printing errors

screen printing errors

2. Mistakes Made in the Use of Paint and Scraper

a) Using paint with the wrong viscosity.

Screen printing inks are generally used according to the manufacturer's instructions. dilution ratio %5–10 It should be thinned out between them.
Mixing paint thinner, water, or any other special thinner randomly will distort the print color.
Especially with water-based paints, the paint dries quickly and freezes on tulle when the ambient temperature exceeds 30°C.

b) Squeegee stiffness and angle

Squeegee stiffness directly determines print quality.

• 65 ShA → soft structure for textile printing
• 75 ShA → general use
• 85 ShA → Hard squeegee for glass and metal printing.

The angle is generally 70–75° It should be around that angle. A steeper angle reduces paint transfer, while a more horizontal angle leaves more paint on the ground.

👉 okangokhan.com/serigrafi-baski-masasi üzerinde doğru rakle açısıyla yapılan baskılar boya tüketimini %15 azaltabilir.

screen printing errors

screen printing errors

3. Common Errors Made During Printing

a) Mold alignment (registration) errors

In multi-color printing, each color needs to blend together.
If the mounting pins are not correctly positioned on the table, the colors will be distorted and the image will be flawed.
Solution: For each color reference point Create the design and perform a "dry run" (pre-press test without paint).

b) Printing speed and pressure imbalance

Screen printing can be done manually or with a semi-automatic system.
In hand printing, excessive pressure causes the paint to bleed to the edges.
In automated systems, tram errors occur when the speed-pressure synchronization is disrupted.

c) Insufficient post-printing drying.

If water-based paints don't dry properly, they will form a crust on the fabric.
For plastisol paints, heat curing at 160°C for 1–2 minutes is required.
at this point okangokhan.com/rayk-drying-rack The products prevent the paint from sticking together before it dries.

screen printing errors

screen printing errors

4. Errors Related to Environmental Conditions

The climate conditions in a screen printing workshop significantly affect the quality of production.

• High humidity → emulsion swelling, paint adhesion
• Low temperature → drying time increases, production slows down.
• Dusty environment → creates pinholes in the mold

The ideal workshop environment:
🌡️ Temperature: 22–28 °C
💧 40–55 % humidity
💨 Ventilation: continuous circulation (e.g., fan or air filter)

screen printing errors

screen printing errors

5. Drying Process and Final Inspection

The drying stage is often "neglected," but it's also where most mistakes are observed.

• If airflow between layers is not provided on the drying rack, the paint will not dry evenly.
• Stacking products on top of each other leads to moisture buildup in the substrates.
• If packaging is done before it is completely dry, the printed surfaces will stick together.

Solution:
Drying racks 50-100 stories Use it in the structure; minimum distance between the lower and upper floors. 25 mm Leave a space.
Support with fan systems if necessary.

👉 Rayk brand Screen Printing Drying Rack These models, with their wheeled design, are the most efficient solution at this stage.

screen printing errors

screen printing errors

6. Print Quality Control

The final quality control stage determines the lifespan of the print.
Checklist:

• Color saturation
• Edge sharpness
• Institutional integrity
• Washing or rubbing test

Make a small sample print, and then water test Applying the paint will help you determine if it has fully adhered to the surface.

7. Solution Proposals Supported by External Resources

📘 Screen Printing Magazine According to the 2024 report published in the journal, the areas where the most errors are made in screen printing are, in order:

1. Molding exposure time
2. Paint viscosity
3. Lack of institution

The same study found that workshops with the right drying system %38 daha az fire It is stated that he gave it.

8. Conclusion

Screen printing is a delicate process; a small mistake can have a chain reaction affecting the entire production.
From molding to painting, drying to the environment, every detail matters.
Therefore, the use of professional equipment in the production line (for example) Rayk drying rack, vacuum printing table, high precision squeegeeThis guarantees quality in the long run.

COMMON ERRORS AND SOLUTIONS IN SCREEN PRINTING – COLOR, TRAMMA, AND INK TRANSFER PROBLEMS (PART 2)

Screen printing is an art form encompassing many technical steps, from design to production. However, no matter how professional the printing process may look, color transitions, tram density, paint mixture And layer alignment Even small mistakes in areas like these can ruin the whole effort.
This section covers the most common problems encountered in screen printing. Color and halftone related errors We will discuss these in detail and offer feasible solutions for each.

1. Gradient Errors

Color transitions in screen printing are not as easy as in digital printing. Due to the physical density and screen structure of the ink, transition areas are more difficult. color refractions or band effect Banding may occur.

a) Incorrect tram value selection.

The halftone value (LPI – lines per inch) determines the smoothness of color transitions.

• 35–45 LPI: ideal for textile printing
• 55–65 LPI: on surfaces such as paper and cardboard
• 75 LPI and above: on high-resolution hard surfaces

Incorrect screen value in print. sharp tonal boundaries It creates.
💡 Solution: When preparing the design, adjust the halftone value according to the absorbency of the surface to be printed on.
If the surface has high absorbency (for example, a cotton t-shirt), a low screen protector should be used.

b) Tram angle error

Misalignment of tram angles creates undesirable patterns called "moiré".
In standard multi-color printing:

• C: 15°
• M: 45°
• Y: 75°
• K: 90°
  It is used as.
  👉 For clear color transitions, the angle of each halftone is different from the others. at least 30° It should be different.

c) Color mixing ratios

In screen printing, color mixing is generally done manually. This increases the margin of error.
Especially in textile dyes, when the pigment concentration is high, the transition areas appear harsher.
Solution: Mix the colors by weighing them (based on grams).
Professional manufacturers formulate paint formulas. Pantone mix recipe with fixed points.
If you'd like, I can also prepare an Excel formula template for these mixture calculations.

2. Tram Errors and Solution Techniques

In screen printing, a halftone screen is a system that expresses grayscale through dot density. However, incorrect halftone selection can lead to tonal distortion and loss of detail in the print.

a) Extremely small tram points

If the curtain opening is smaller than the screen point, the paint cannot penetrate the surface.
Rule: Mesh count refers to the minimum tram line density. 4 times It should be.
For example, if you are using a 50 LPI screen, your minimum number of sheer curtains is... 200 mesh should be.

b) Insufficient exposure

When the exposure time is short, the edges of the halftone dots fade.
This causes "freezing" or "contamination".
By performing pose tests for each pattern. fixed position value determine.
📍 Note: Exposure times change if the UV lamps exceed 1000 hours of lifespan; check regularly.

c) Screen thickness (emulsion layer) imbalance

Using an overly thick emulsion in tram zones will cause the dots to merge.
The thin emulsion layer preserves the tram detail.
👉 On this matter Rayk screen printing drying racks, This provides a great advantage for molds that dry properly.
Review: okangokhan.com/serigrafi-ekipmanlari

screen printing errors

screen printing errors

3. Paint Transfer Problems

a) Difference in paint density

If the paint viscosity is too low, it will spread too much; if it's too high, it will clog the screen markings.
While preparing the paint viscometer Or you can use a simple flow test.
Ideal duration: 20–25 seconds (Ford Cup No.4)

b) Squeegee angle and pressure error

If the squeegee is pressed too hard, the halftone dots are crushed and detail is lost.
At extremely low pressure, the paint will not pass through.
Suggested angle: 70–75°
Pressure: Just enough to ensure an even distribution across the surface.

c) Curtain soiling or dye buildup

Mesh eye obstruction is very common in tram prints.
In this case, the color transitions appear "fragmented".
After each print, the bottom of the tulle with a soft brush + suitable cleaner. Clean.
→ Thinner, alcohol, or aggressive solvents weaken tulle fibers in the long run.

🧽 Developed in Okan Gökhan's workshop “"curtain care kits"” This minimizes the problem.
More information: okangokhan.com/serigrafi-tul-bakimi

4. Errors in Multicolor Printing

Screen printing is relatively simple when it's monochrome; however, alignment errors become inevitable when two or more colors are added.

a) Registration slip

Because each plate is printed separately, even millimeter-sized differences can disrupt the color transition.
Secure the registration pins at the same point on each die.
If your printing table has wheels or is mobile, you will need to secure it in place. vacuum table with mechanical locking system Use it.

b) Drying time between colors

If you apply the second coat before the first coat dries, the underlying paint dissolves and a color mixture forms.
Solution: Between each color 5-10 minutes wait or flash dryer Use it.
Alternatively okangokhan.com/rayk-drying-rack You can control the drying speed between layers with these products.

c) Color sequence

Always print lighter colors before darker colors.
When dark tones (such as black or navy blue) are placed on top of lighter colors, the underlying color becomes invisible.

5. Quality Control Methods in Screen Printing

The most effective way to maintain quality in screen printing is..., standard control tests to do.
The following methods are applied in professional workshops every shift:

1. Trajectory control with a loupe (magnifying glass):
   Is there any point deformation or merging?
2. Densitometer measurement:
   Is the color intensity in the range of 1.30–1.40?
3. Print repeatability test:
   When the same design is printed 10 times, is the color difference within the ±5% limit?
4. Institutional control:
   Does the paint adhere to the surface as it dries? (If it collects dust during the hand test, it means it's not completely dry.)

6. External References

📚 FESPA Technical Guide – “Screen Printing Process Control” raporunda, renk geçişlerinde doğru tram açısı ve nem kontrolünün baskı hatalarını %30 azalttığı belirtiliyor.
📘 Screen Printing Magazine – Issue 05/2024 – The importance of paint viscosity and screen balance is emphasized.
🔗 Wikipedia – Halftone Printing – Tram logic and optical density calculations.

7. Conclusion

Color and halftone errors are the most common, but also the most easily preventable, problems in screen printing.
With the right screen selection, appropriate exposure time, and controlled drying, you can elevate your print quality to industrial levels.
Always remember: Quality is repeatability.

In the next section, we will move on to the following topics 👇
➡️ “Post-screen printing maintenance errors”
➡️ “Ways to extend mold life”
➡️ “Quality assurance routines applied in professional workshops”

COMMON MISTAKES AND SOLUTIONS IN SCREEN PRINTING – MAINTENANCE, QUALITY AND LONGEVITY (PART 3)

Achieving excellent results in screen printing depends not only on the correct printing techniques, but also on the post-printing processes. maintenance, cleaning and storage It is also directly related to its applications.
This final section will help you maintain production quality in the long term. Maintenance routines, methods for extending equipment life And with frequently asked questions, we will bring the entire process to a professional workshop standard.

screen printing errors

1. The Most Common Post-Printing Errors

a) Do not wash the mold immediately after printing.

The paint remaining on the mold clogs the pores as it dries.
This also prevents the paint from transferring properly in subsequent prints and distorts the pattern.
Correct application:
Once printing is complete, rinse the plate with lukewarm water, then use a neutral pH cleaner.
Thinners or abrasive solvents weaken the emulsion layer, leading to mold cracking in the long run.

🧴 Used in Okan Gökhan's screen printing workshop emulsion-friendly cleaning solutions, tülün ömrünü %40’a kadar uzatabilir.

b) Leaving printing equipment uncleaned

Dried paint remaining on parts such as squeegees, paint containers, and stirrers can cause color contamination (mixing) in subsequent prints.
Solution:
Clean your equipment immediately after each color change. Wiping the squeegee rubber with a damp cloth, in particular, will prevent paint from accumulating on the edges.
➡️ Paint residue Instead of scraping from metal surfaces, dissolve it with a solvent-soaked cloth. It is the safest method.

c) Increasing the heat to shorten the drying process.

Increasing the dryer temperature to produce more in a shorter time is a common but dangerous mistake.
Extreme temperatures cause the paint to crack on the surface and harden in textile prints.
💡 Ideal temperature: 160 °C for plastisol paints, 110–120 °C for water-based paints.
You can speed up this process with fan-assisted drying racks.
Detailed models: okangokhan.com/rayk-drying-rack

2. Methods for Extending Mold and Equipment Life

a) Mold storage

Cleaned molds should be stored upright in a dark, dry place.
In molds exposed to direct sunlight, the emulsion surface crystallizes.
Clue: Storing the molds in protective sleeves protects them from both dust and moisture.

b) Checking the tulle tension.

Tulle loosens over time, which affects pressure leveling.
Every 3 months voltage meter Check with.
Tulle fabrics that fall below 20 N/cm² must be re-stretched.

c) Squeegee rubber maintenance

Microscopic abrasions on the squeegee edges create lines in the print.
Replace the squeegee blade with fine sandpaper after every 3–5 pressing sessions.
In the long run, instead of a straight edge 45° cutting profile squeegee Using it optimizes paint transfer.

3. Paint and Environmental Management

a) Storage conditions for paints.

• Paints light-free, at constant temperature (18–25 °C) Store in suitable environments.
• Keep opened paint containers tightly closed, as paint exposed to air will quickly form a crust.
• Do not attempt to thin paints that have lost their viscosity with thinner; this will alter the pigment ratio.

b) Maintain humidity and temperature balance.

Serigrafi atölyesinde optimum nem %40–55, sıcaklık 22–28 °C aralığında olmalıdır.
Heaters dry out the air in winter; use a humidifier in this case.
Placing the printing table directly under an air conditioner in the summer — the airflow will unevenly regulate the drying rate.

4. Production Planning and Quality Monitoring

In professional workshops, at the end of every job... “"production card"” It is held.
This card contains the following information:

• Paint brand and code
• Squeegee stiffness and angle
• Tulle mesh number
• Drying time and temperature
• Mold number used

Thanks to this information, when the same task comes up again, you won't need to start from scratch.
📋 I can do this for you if you want. Word + Excel template I can prepare: “Screen Printing Production Tracking Form”.

5. Quality Assurance Procedures (Q-Control)

To ensure quality assurance in screen printing, standardize the following three steps:

1. Sample Approval: Before each project, produce one test print and obtain written approval from the customer.
2. Intermediate Check: Perform color and alignment checks every 20 prints during production.
3. Final Check: Compare the dried samples under light to determine the difference in color.

This procedure is the most guaranteed way to increase customer satisfaction.
Düzenli kontrol, iade oranlarını %60’a kadar azaltır.

6. Techniques for Reducing Waste in Screen Printing

• Label paint mixtures with a "color code + date" tag.
• Do not reuse the used emulsion; prepare a fresh one.
• After production, store excess paint upside down under the lid (this reduces air contact).
• Wipe the printing table with a microfiber cloth between plate changes.
• All equipment regularly 5S system (Sort, Sort, Remove, Standardize, Maintain) Organize with it.

7. Frequently Asked Questions (FAQ)

Question 1: Why does the ink crack after screen printing?
Reply: This is usually caused by rapid drying at excessively high temperatures or poor quality emulsions. The ideal drying temperature range is 110–160 °C.

Question 2: Why does tulle tear so quickly?
Reply: Excessive tension or the use of a stiff squeegee can cause this. Do not use squeegees above 75 ShA on delicate tulle.

Question 3: Why do the color tones appear so different?
Reply: Different viscosities or layer thicknesses can cause color variations. Perform color mixing using a digital scale.

Question 4: After how many prints should the mold be replaced?
Reply: It should be replaced after approximately 1000–1500 prints. However, with proper maintenance, it can last up to 3000 prints.

Question 5: Is it possible to reduce the smell of paint?
Reply: Yes, you can use water-based paint instead of solvent-based paint, or you can strengthen the ventilation system.

screen printing errors

screen printing errors

screen printing errors

screen printing errors

8. Conclusion

In screen printing, quality is not only determined at the printing stage, before and after It is protected by the procedures carried out.
Mold cleanliness, environmental balance, the right drying equipment, and regular maintenance are essential for long-term success.
Don't forget: Professional results stem from a consistent process.

Throughout all these stages, we, as OkanGökhan, have developed... Rayk Screen Printing Drying Racks, vacuum printing tables And Curtain care solutions, It was designed to guarantee quality on the production line.
Detail: okangokhan.com/serigrafi-ekipmanlari

screen printing errors

screen printing errors

screen printing errors

screen printing errors

screen printing errors

screen printing errors

screen printing errors

screen printing errors

screen printing errors

screen printing errors

screen printing errors