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Ink may be too viscous.
Mix thoroughly first. If needed, add the correct thinner in small increments, remix and retest.
Printcolor Ink Preparation & Process Control
Visco Spatula for Pad & Screen Printing Ink Viscosity Control
Stop guessing at ink consistency. The reusable stainless-steel Visco Spatula gives operators a fast, repeatable flow-time reference for preparing and checking pad printing and compatible screen printing inks before production.
~8 SecondsTypical Deco Tech pad-printing flow-time reference.
Why Ink Viscosity Matters
Ink can look right and still print wrong.
Viscosity influences ink release, transfer, edge definition, opacity and drying behavior. A repeatable flow-time check gives operators a documented production reference instead of adjusting thinner by appearance or feel alone.
Cleaner Ink TransferSupports more consistent release from the cliché or screen to the part.
Sharper Print DetailHelps protect fine lines, small text and controlled ink deposits.
Less Operator GuessworkUse a timed reference that can be repeated by different operators.
Faster Setup DecisionsQuickly determine whether mixing or a controlled viscosity adjustment is needed.
How it works
How the Visco Spatula Works
Dip. Lift. Time. Adjust.
After the ink, hardener and appropriate thinner are mixed, the Visco Spatula turns ink consistency into a repeatable flow-time check.
8seconds is the typical Deco Tech pad-printing reference from the large upper opening to the bottom opening.
1
SubmergeCover all calibrated openings with mixed ink.
2
Lift & timeLift vertically and allow the ink to flow back into the cup.
3
Watch the openingsTime the flow as the openings clear in sequence.
4
Adjust & repeatDocument the flow time that produces the approved print condition.
Ink Viscosity Control
Read the result, then make a controlled adjustment.
Use flow time as a repeatable production reference. The best target is the condition that produces the approved transfer, opacity, edge quality and drying behavior for the specific job.
Repeat the approved flow time.
Record the flow time that produces an accepted print and use it as the setup reference for repeat production.
Ink may be over-thinned.
Stop adding solvent and recheck the mixture against the ink technical data sheet and approved setup.
Pad Printing Ink Viscosity
Pad printing depends on controlled solvent evaporation and clean transfer from the cliché to the silicone pad and then to the part. Use the ~8-second benchmark as a starting reference and document the approved job condition.
Explore Printcolor pad printing inks →Screen Printing Ink Viscosity
Screen printing viscosity is application-specific and influenced by ink chemistry, mesh, stencil, artwork, squeegee setup, speed and desired deposit. Use a repeatable flow-time reference when appropriate for the ink system.
Explore Printcolor screen printing inks →Processing note: Deco Tech's Visco Spatula bulletin lists approximately 5–8% thinner by weight as a typical pad-printing starting point. The correct amount can vary by Printcolor ink series, color, hardener, ambient conditions, artwork, cliché depth and production setup. Always follow the technical data sheet for the specific ink.
Choose the Right Level of Control
Manual setup check or automatic viscosity management?
The Visco Spatula is ideal for manual ink preparation and setup verification. Higher-volume pad printing can benefit from continuous automated viscosity control.
Visco Spatula
A straightforward shop-floor tool for preparing ink and creating a repeatable operator reference.
- Manual flow-time check
- Low-cost process standardization
- Useful for setup and troubleshooting
- No electronics or power required
VISCOMATIC™ Automatic Control
For production environments that need continuous pad-printing ink management with less operator intervention.
- Automatic viscosity monitoring
- Automatic solvent adjustment
- Continuous ink mixing
- Designed for demanding production runs
Complete the Ink Setup
Related pad & screen printing resources
Frequently Asked Questions
Ink viscosity control questions
What does a Visco Spatula do?
It provides a repeatable flow-time reference for printing ink. The calibrated openings are submerged in mixed ink, the spatula is lifted vertically, and the operator times how long the ink takes to clear the openings.
What is the correct Visco Spatula time for pad printing ink?
Deco Tech's operating method uses approximately eight seconds from the point the ink clears the large upper opening until it flows through and clears the bottom opening. Treat this as a starting benchmark and document the condition that produces the approved print.
Can the Visco Spatula be used for screen printing ink?
It can be useful as a repeatable flow-time reference for compatible screen printing ink systems, but screen printing does not have one universal viscosity target. Mesh, stencil, ink chemistry, artwork, squeegee setup and print speed all influence the preferred condition.
Does the Visco Spatula replace a laboratory viscometer?
No. It is a practical production comparison tool for reproducing an approved ink condition using flow time. Applications requiring laboratory viscosity values should use the specified laboratory measurement method.
Need help getting your ink mixture under control?
Deco Technology Group can help with the Visco Spatula, Printcolor ink systems, thinners, hardeners and pad or screen printing process support.