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I M A G I N G T E C H N O L O G I E S
Ink Design Considerations for Industrial Printing
C O N F I D E N T I A L
Coming up
A bit about Sensient
The process
The requirements & challenges
Application examples
The future
C O N F I D E N T I A L
• Sensient is a leader in the development & manufacturing of high-quality, innovative inks.
• Sensient has the expertise to formulate the ideal ink for any media or printing technology such as
ink for textiles, food, packaging, decoration material, medical devices or electronics.
S E N S I E N T
I M A G I N G T E C H N O L O G I E S
C O N F I D E N T I A L
A robust global organization to
serve you long term
We develop industry
changing innovations in
collaboration with our customers
Our size, stability, and global
reach gives you a long term
partner
We constantly invest &
expand our capacity
The Sensient
Difference…
C O N F I D E N T I A L
Innovative
Ink
design
& PerformanceResearch into new raw materials
and manufacturing technologies
Broad range of application
testing capabilities
Advanced physical and chemical
analytical capabilities
Rich portfolio of innovations
protected by patents
C O N F I D E N T I A L
The Process
• Chemistry must solve a production
problem/process
• For production processes validation becomes
key
• In-line inspection/correction
• Drying regime to fit process and footprint
• Speed dictated by slowest pre-and post-print step
C O N F I D E N T I A L
In-line or off-line, impacts ink design?
In-line
• High speed requirement, typically
single pass
• Risk of line stop for defects –
complex maintenance
• Inspection and correction critical
• Potential rate limiting step
Off-line
• Disruptive process
• Secondary process that must
feed back in to production line
• Defects less critical
• Maintenance simplified
• Typically slower print process
C O N F I D E N T I A L
Key to Understand Viability
Fixation
Drop control
Drying
Print configuration
Post process
steps?
Ink/substrate
Substrate
Porous, non-porous
Pre-process e.g. purging, surface
treatment
Rigid, flexible, stable
Surface energy
structure,
InkAqueous, solvent, UV
Chemically safe &
environmentally friendly
Excellent print performance
Vibrant, consistent colour
Fastness
Regulatory
Printhead
Head/nozzle config
Chemical compatibility
Drop size & speed
Firing frequency
Ink physical requirements
(viscosity, surface tension, pH
etc….)
PROCESS
Speed
C O N F I D E N T I A L
Ink Requirements
High printing reliability and consistency
• Performance at production speeds
• Drying speed
• Jet straightness
• Resolution
Printhead and system compatibility
Application performance
• Colour, function, fastness
Regulatory assurance
C O N F I D E N T I A L
Ink Challenges
System
• Materials
• Function vs. suitability for jetting
• Availability, purity, particle size, consistency
• Regulatory understanding
• Drying
• Speed vs. latency
• Fastness
• Adhesion vs. jetting
• Shelf life
• Materials vs stability
C O N F I D E N T I A L
Ink interactions
Drop behaviour on substrate controlled by
• Surface tension of ink
• Surface energy of substrate
• Post-printing process (Absorption, Drying, Curing, Sintering…)
Tune morphology of printed features by adjusting ink properties, post and pre-printing process
C O N F I D E N T I A L
Ink testing & validation as important?
• Stability
• Jetting
• Waveform
• Application
C O N F I D E N T I A L
Industrialisation
• Scale-up is key
• Transition from lab to production
• Stability/shelf life
• Supply chain
Prototype formulation
Lab Sample
Pilot Scale
Manufacturing Scale
Full Production
Volume
Complexity
C O N F I D E N T I A L
Innovation more than ink?
• Yes first consideration but…….
• Process development
• Workflow
• Software
• Packaging
• Selling concepts
• Manufacturing tools and techniques
C O N F I D E N T I A L
Conclusions - Importance of ink choice
Chemistry is key but one part of a complex science
• Color consistency and uniformity
• Purity and compatibility
• Materials selection, consistency and reliability
Application performance
Partners with knowledge of the process
Defines the value add
• OEM solution offers users only price differentiation
• Quality alternative inks allow performance and quality differentiation
Support defines partnership for the future
16
I M A G I N G T E C H N O L O G I E S
Come see us – Hall A6, Stand 418
Simon Daplyn – simon.daplyn@sensient.com
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