Water-based screen printing inks have evolved from simple, early textile dyes into one of the most advanced, sustainable, and high-performance ink systems used in today’s apparel and specialty printing. This guide distills the history, chemistry, techniques, equipment, and expert insights (including Mark Gervais’ professional training) into a single, easy-to-read resource.
What Makes Water-Based Inks Different?
Unlike plastisol—which sits on top of the fabric—water-based inks penetrate and bond into the fibers. When the water evaporates and the binders cure, the result is a print that feels soft, breathable, flexible, and integrated with the garment.
Core principle:
Water is the carrier. As it evaporates, pigment and binders fuse inside the fabric.
Curing temperature:
~ 320°F / 160°C (depending on formulation), with airflow being just as important as heat.
A Short History of Water-Based Printing
Early Origins
Water-based formulas were the first inks ever used in textile printing. Artists like Andy Warhol relied on water-soluble dyes and binders long before industrial ink systems existed.
The Plastisol Takeover (1961)
Plastisol introduced:
- Easy handling
- High opacity
- Long open time
- Simple curing
These advantages pushed water-based inks aside for nearly 40 years.
The Global Comeback
From the 1990s onward, water-based inks came roaring back thanks to:
- Increased environmental regulations
- The demand for soft-feel fashion prints
- European market adoption
- Major advancements in ink chemistry
Today, they are a top choice for premium apparel and forward-thinking printing shops.
How Water-Based Inks Actually Work
1. The Mechanism
- Water carries pigment + resin.
- Heat and airflow evaporate the water.
- Resin and pigment crosslink inside fibers.
- A permanent, flexible bond is formed.
2. Ink Types
• RFU (Ready-for-Use) – simple to use, ideal for everyday production
• High Solids Acrylic (HSA) – high opacity for brights and darks
• Discharge inks – remove the garment dye and replace it with pigment
• Pigment/lacquer inks – used on posters, glass, metal, wood
3. Curing Requirements
Water must leave the ink first, before binders can fuse.
Airflow is mandatory: without it, the print steams instead of curing.
The Advantages of Water-Based Printing
✓ Ultra-Soft Hand
The fabric breathes; the print becomes part of the garment.
✓ Durability
Properly cured prints resist cracking, peeling, and flaking.
✓ Eco-Friendly Characteristics
- No PVC
- No phthalates
- Lower VOCs
- Water cleanup
(Always follow local wastewater regulations.)
✓ High Detail
Thin-thread meshes + low viscosity = crisp lines and fine halftones.
✓ Color Vibrancy
Especially strong on 100% cotton.
✓ Versatile Applications
Beyond apparel:
- Posters
- Canvas
- Wood
- Glass
- Metal
- Product decoration
Real-World Challenges (and How to Solve Them)
Water-based inks are powerful, but they demand proper technique.
1. Fast Drying in the Screen
Ink can dry in minutes.
Solutions:
- Mandatory flood stroke
- Retarders/humectants
- Controlled humidity
- Continuous printing discipline
2. Opacity
Challenging on dark garments.
Solutions:
- HSA systems
- Discharge underbases
- Tight mesh selection
3. Stencil Durability
Water aggressively attacks emulsions.
Solutions:
4. Color Matching Difficulty
Less opaque inks = less forgiving Pantone mixes.
Solution:
- Record mixes carefully
- Test and document everything
5. Production Speed
Extra flashes, airflow needs, and screen maintenance can slow runs.
Screens, Stencils & Mesh (Critical Setup)
Screen Cleaning
- Clean immediately — dried ink is extremely difficult to remove.
- Avoid hot solvents (MEK, Acetone) with water-resistant emulsions.
- Use warm water buckets for initial rinsing.
Emulsion Selection
Recommended:
- Water-resistant dual-cure
- Harden for runs > 500 prints
- Use the same emulsion for blockout
- Avoid heavy tape use on discharge jobs
Mesh Count Guide
- 110–160 TPI (43–63 t/cm): General water-based printing
- 225 TPI / 40-micron threads: Fine detail
- Lower mesh = flooding
- Higher mesh = faster clogging
Printing Technique: The Mark Gervais Method
From the well-known 6-part training series.
1. Mandatory Flood Stroke
After every print stroke:
- Lift squeegee
- Lightly flood the image area
- Keep mesh moist — no exceptions
2. Printing Flow
- Do not pause more than ~1 minute
- If stopping:
- Flood screen heavily or
- Move all ink out of the image area
- Cover ink with plastic film
3. Environmental Control
- Humidifier near press
- Spray bottle for minor clogs
- Wipe with water or water-safe screen opener
4. Additives
- Retarders: slow drying
- Humectants: prevent clogging without thinning
- Catalysts: help curing if heat is insufficient
- Crosslinkers: lower curing temp (great for polyester)
Press Set-Up Essentials
Squeegees
- Must be sharp
- Consistent pressure, speed & angle
- Maintain blade edges regularly
Pallet Temperature
140–150°F (60–65°C) is ideal
This temperature:
- Drives off water
- Maintains ink flow
- Prevents buildup on screens
Flash Curing
Air-assisted flash cures work best.
You need:
- Heat
- Air movement
Machine Warm-Up
Before printing:
- Warm platens
- Warm screens
- Run test pulls
Curing Water-Based Ink (The Most Important Step)
Water-based inks do not cure like plastisol.
You must satisfy all 3:
1. Time – usually 2.5–3 minutes
2. Temperature – depends on manufacturer
3. Airflow – removes water vapor efficiently
The Dual-Pass Method
- First pass: evaporate water
- Second pass: cure resins
Small dryers may require 3 passes.
Avoiding Problems
- Too little time = undercure
- Too little airflow = condensation inside dryer
- Inconsistent heat = color variation
Scientific Note
During curing, water-based inks shift from:
- Alkaline → Acidic
This activates crosslinking and final adhesion.
Eco-Debate, Myths & Misconceptions
Misconceptions
“They wash out easily.”
False — only undercured prints wash out.
“Too hard to use.”
Modern HSA and additives make them beginner-friendly.
“Requires expensive new equipment.”
Not true — lower-temp curing can reduce equipment cost.
Important Realities
- Water cleanup still produces wastewater
- Some formulas include additives not 100% natural
- Plastisol is also evolving (PVC-free options exist)
The Future of Water-Based Printing
1. Sustainability
Manufacturers are pushing toward:
- Zero VOC
- Bio-based resins (corn, wood waste, bacteria)
- Non-toxic chemistries
2. Smart Chemistry
Expect new:
- Crosslinkers that cure at very low temps
- Humectants with hours of open time
- Fixers that boost wash durability
- Additives for stretch and migration resistance
3. Expanded Applications
Water-based systems are moving into:
- Plastics
- Electronics (conductive inks)
- Medical devices
- Functional coatings
4. Hybridization
Blended plastisol + water-based systems and digital hybrid equipment continue to rise.
Why Water-Based Inks Matter
Water-based inks represent:
- Comfort (soft prints)
- Longevity (properly cured durability)
- Sustainability (safer chemistry)
- Innovation (smart additives, nanotech, hybrid workflows)
From high-fashion brands to local shops, water-based printing signals quality, environmental responsibility, and technical sophistication.
The Ultimate Guide to Water-Based Printing Videos
Mark Gervais, an experienced screen printer specializing in water-based and PVC-free inks, has put together a six-part video series that covers everything you need to know about printing with these inks.
From color separation to shop workflow, these tutorials walk you through the entire process. Mark is known for his clear, detailed explanations, making it easy to pick up effective techniques and avoid common mistakes.
The videos are from 2013, so the audio quality isn’t perfect—but the information is invaluable and completely free. If you want to master water-based screen printing, this series is all you need.
