Patent 8772416

Derivative works

Defensive disclosure: derivative variations of each claim designed to render future incremental improvements obvious or non-novel.

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Derivative works

Defensive disclosure: derivative variations of each claim designed to render future incremental improvements obvious or non-novel.

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Defensive Disclosure Document: Enhancing the Prior Art Landscape for US Patent 8772416

Patent: US 8772416 B2, "Ink compositions containing isosorbide-capped amide gellant"
Assignee: Xerox Corp
Current Date: April 26, 2026

Purpose: This Defensive Disclosure document aims to broaden the public domain's knowledge base related to US Patent 8772416, specifically concerning ink compositions employing isosorbide-capped amide gellants and methods of using them. By thoroughly detailing derivative variations of the core inventive concepts, we intend to create robust prior art that would render future incremental improvements by competitors "obvious" or "non-novel" under 35 U.S.C. § 102 and § 103, thereby minimizing the potential for future patent infringement claims in related technological spaces. This document serves as a strategic defensive publication.

Derivation Framework and Derivative Variations

For each core claim identified in US Patent 8772416, the following derivative variations are presented, designed to expand the inventive concept along specific axes.

Core Claim Focus: Independent Claim 11 (Gellant Compound) and related aspects of the isosorbide-capped amide gellant.

Derivative 1: Isosorbide Analog-Capped Amide Gellants (Material & Component Substitution)

  • Enabling Description: An ester-terminated polyamide gellant, structurally analogous to that described in US8772416, wherein the terminal isosorbide groups are substituted with other bio-based cyclic diols or polyols exhibiting differential hydroxyl group reactivity. Specifically, the end-caps are derived from isomannide or isoidide, which are diastereomers of isosorbide and possess similar fused tetrahydrofuran ring structures with distinct endo- and exo-hydroxyl group reactivities. The synthesis involves reacting the organoamide intermediate with isomannide or isoidide using a DCC (N,N'-dicyclohexylcarbodiimide) coupling reaction, optionally catalyzed by DMAP (4-dimethylaminopyridine). This leverages the inherent differential reactivity of the isomannide or isoidide hydroxyl groups to selectively achieve mono-esterification per terminus, thereby minimizing undesired oligomerization or dimerization, similar to the benefits observed with isosorbide. The polyamide backbone (R1 and R2 groups) and the number of repeating units (n, from 0 to 20) are maintained within the ranges specified in US8772416. The resulting gellant maintains amphiphilic properties and phase-change characteristics comparable to the isosorbide-capped variant.
  • Combination Prior Art Scenarios:
    1. This derivative combined with an open-source standard for bio-based polymer synthesis protocols (e.g., standard esterification routes in open chemical databases like PubChem, coupled with general green chemistry principles), specifically regarding the synthesis of ester linkages from diols.
    2. Combined with ASTM D6866 (Standard Test Methods for Determining the Biobased Content of Solid, Liquid, and Gaseous Samples Using Radiocarbon Analysis) to verify the bio-renewable content of the resulting gellant derived from isomannide or isoidide.
    3. Combined with OSI-approved open-source software libraries for molecular dynamics simulations (e.g., GROMACS, LAMMPS) to predict gellant aggregation and rheological properties based on the specific endo/exo-hydroxyl group conformations of the new end-cap structures.
classDiagram
    class AmideGellantIntermediate {
        +PolyamideBackbone
        +CarboxylicAcidTermini
    }
    class BioCyclicDiol {
        <<Isomannide/Isoidide>>
        +HydroxylGroup1 (endo-like)
        +HydroxylGroup2 (exo-like)
        +DifferentialReactivity
    }
    class DCC_Coupling_Reaction {
        +Esterification
        -DCHU_byproduct
        -Optional_DMAP_Catalyst
    }
    class BioCappedAmideGellant {
        +PolyamideBackbone
        +EsterLinkage1
        +BioCyclicDiolEndCap1
        +EsterLinkage2
        +BioCyclicDiolEndCap2
        +FreeHydroxylGroups
    }

    AmideGellantIntermediate "1" -- "1" DCC_Coupling_Reaction : reacts with
    BioCyclicDiol "2" -- "1" DCC_Coupling_Reaction : reacts with
    DCC_Coupling_Reaction "1" -- "1" BioCappedAmideGellant : produces

Core Claim Focus: Independent Claim 1 (Curable Solid Ink Composition) and Independent Claim 16 (Method of Ink Jet Printing)

Derivative 2: Ink with Alternative Bio-Derived Curable Waxes (Material & Component Substitution)

  • Enabling Description: A curable solid ink composition as described in US8772416, wherein the curable wax component comprises an acrylated or methacrylated derivative of a fatty acid wax obtained from plant sources, specifically a functionalized derivative of hydrogenated castor oil (e.g., poly(12-hydroxystearic acid) acrylate) or carnauba wax. These waxes are functionalized via esterification of available hydroxyl groups or by epoxidation of residual unsaturations followed by ring-opening with acrylic or methacrylic acid. The resulting functionalized wax retains its solid phase at room temperature (e.g., melting point 40-80°C) and incorporates UV-curable functionality. The curable wax is present in an amount of 0.1 to 30% by weight of the total ink, maintaining the bio-renewable content and thermoreversible properties. The isosorbide-capped amide gellant, monomers (e.g., SR9003), optional colorant, and photoinitiator components remain as specified in the parent patent.
  • Combination Prior Art Scenarios:
    1. Combined with an open-source database of natural waxes and their detailed chemical compositions (e.g., entries in PubChem or specialized bio-chemistry databases), providing starting material specifications and known functional groups.
    2. Combined with ISO 17088:2012 (Specifications for compostable plastics) and ASTM D6400 (Standard Specification for Labeling of Plastics Designed to be Aerobically Composted) to ensure and certify the biodegradability and compostability of the wax component after curing.
    3. Combined with Apache FOP (Formatting Objects Processor), an open-source print formatter, to simulate and model how varying ink rheology imparted by different bio-waxes affects print quality parameters across diverse porous and non-porous substrates.
flowchart TD
    A[Natural Plant Wax (e.g., Castor Oil, Carnauba)] --> B{Chemical Modification};
    B -- Hydroxylation/Esterification --> C[React with Acrylic/Methacrylic Acid];
    B -- Unsaturated/Epoxidation --> D[Epoxide Ring-Opening with Acrylic Acid];
    C --> E[Bio-Derived Curable Wax];
    D --> E;
    E --> F[Formulate Curable Solid Ink (with Isosorbide Gellant)];
    F --> G[Jetting & UV Curing];
    G --> H[Printed Image with Bio-Wax];

Derivative 3: Ink Jetting at Extreme Temperatures (Operational Parameter Expansion)

  • Enabling Description: A method of ink jet printing an image wherein the curable solid ink, comprising the isosorbide-capped amide gellant, curable wax, one or more monomers, and a photoinitiator, is jetted at significantly elevated temperatures ranging from 120°C to 180°C. To achieve stable jetting at these temperatures while maintaining optimal viscosity (e.g., 5 to 15 cP, or even lower for specialized micro-jetting applications), the ink composition is adjusted to include a higher proportion of low-viscosity, high-boiling-point curable monomers (e.g., increased monomer content to 70-95% by weight, utilizing highly branched or ether-functionalized acrylates/methacrylates known for thermal stability, such as specific alkoxylated neopentyl glycol diacrylates or tricyclodecane dimethanol diacrylates) and potentially a reduced curable wax content (e.g., 0.1-5% by weight). This enables printing on highly heat-absorbent substrates or within specialized industrial additive manufacturing processes where rapid thermal solidification upon contact is crucial. Curing is performed with high-intensity UV-LED systems (e.g., 1000-5000 mW/cm²) operating at wavelengths tailored for the selected photoinitiator and monomer system, ensuring rapid and complete polymerization at the elevated substrate temperatures.
  • Combination Prior Art Scenarios:
    1. Combined with ASTM D445 (Standard Test Method for Kinematic Viscosity of Transparent and Opaque Liquids) to standardize and certify viscosity measurements of the ink formulations at these extreme jetting temperatures.
    2. Combined with the G-code standard for additive manufacturing (e.g., RepRap firmware's G-code extensions) to implement precise deposition control, layer formation, and temperature management for high-temperature 3D printing applications.
    3. Combined with IEC 62471 (Photobiological safety of lamps and lamp systems) to ensure operator safety and system compliance when utilizing high-intensity UV-LED curing systems in industrial environments.
sequenceDiagram
    participant InkReservoir as Ink Reservoir
    participant PrintHead as Print Head (Heated)
    participant Substrate as Substrate (Pre-heated/Ambient)
    participant UVLEDSystem as UV-LED Curing System

    InkReservoir->>PrintHead: Heat Ink (120-180°C), Maintain 5-15 cP
    PrintHead->>Substrate: Jet Ink Droplets
    Note over Substrate: Rapid Gelling/Solidification on Contact
    Substrate->>UVLEDSystem: Move Printed Substrate
    UVLEDSystem->>Substrate: High-Intensity UV Cure
    Note over Substrate: Robust Cured Image at High Temperature

Derivative 4: Nanoscale Printing and Microfabrication (Operational Parameter Expansion)

  • Enabling Description: A method for micro- and nano-fabrication employing the curable solid ink of US8772416, specifically adapted for deposition via electrohydrodynamic (EHD) jet printing or aerosol jet printing. The ink formulation is precisely tuned for nanoscale resolution: the isosorbide-capped amide gellant concentration is typically reduced (e.g., 1-5% by weight) to prevent premature nozzle clogging in sub-micron apertures, and the monomer blend consists primarily of low molecular weight, low surface tension monomers (e.g., tripropylene glycol diacrylate, isodecyl acrylate, or specific highly reactive oligomers) optimized for picoliter to femtoliter droplet generation and feature sizes down to tens of nanometers. The ink is jetted onto a micro- or nano-patterned substrate (e.g., silicon wafers, flexible polymer films), and subsequent localized UV curing (e.g., using focused laser UV light, multi-photon polymerization, or mask-less lithography) is employed for precise polymerization. This enables the creation of intricate 3D microstructures, functional conductive or dielectric coatings for MEMS devices, flexible electronics, or advanced optical components.
  • Combination Prior Art Scenarios:
    1. Combined with the IPC-7351 standard (Generic Requirements for Surface Mount Design and Land Pattern Standard) for defining component footprints and interconnection patterns in microelectronic applications, facilitating precise ink deposition.
    2. Combined with OpenFOAM, an open-source computational fluid dynamics (CFD) software, to model the fluid dynamics of the ink within micro-nozzles and during droplet formation, optimizing print head geometries and jetting parameters for nanoscale precision.
    3. Combined with GIMP (GNU Image Manipulation Program) or other open-source imaging software (e.g., ImageJ with specialized plugins) for high-resolution image preparation, grayscale printing, and rasterization tailored for generating intricate nanoscale patterns.
graph TD
    A[Ink Formulation (Low Gellant, Low MW Monomers)] --> B[EHD/Aerosol Jet Head (Nano-Nozzles)];
    B --> C[Micro/Nano-Patterned Substrate];
    C --> D[Localized UV Curing (e.g., Focused Laser)];
    D --> E[Cured Nanoscale Structure/Component];
    E --> F[Application: MEMS, Flexible Electronics, Optics];

Derivative 5: 3D Bioprinting Scaffolds with Functionalized Gellant (Cross-Domain Application)

  • Enabling Description: A curable bio-ink composition for 3D bioprinting, specifically designed for creating biocompatible scaffolds for tissue engineering. The core component is an isosorbide-capped amide gellant, wherein the free hydroxyl groups of the isosorbide end-caps are further functionalized with biocompatible moieties, such as cell-adhesion peptides (e.g., RGD sequences), growth factors, or biodegradable linkers (e.g., caprolactone). The polyamide backbone (R1, R2, n) is selected to enhance biocompatibility and biodegradability. The bio-ink further comprises biocompatible curable monomers (e.g., polyethylene glycol diacrylate (PEG-DA), gelatin methacrylate (GelMA), or hyaluronic acid acrylate), a photoinitiator suitable for low-intensity UV or visible light curing (e.g., Irgacure 2959, LAP (lithium phenyl-2,4,6-trimethylbenzoylphosphinate), or riboflavin for cell viability), and optionally live cells. The gellant provides a thermally-driven, reversible gel phase, allowing the bio-ink to be jetted or extruded as a liquid at elevated temperatures (e.g., 30-45°C) and rapidly solidify into a stable hydrogel scaffold upon cooling or mild UV exposure, maintaining structural integrity during printing.
  • Combination Prior Art Scenarios:
    1. Combined with the DICOM (Digital Imaging and Communications in Medicine) standard for medical image data (e.g., MRI, CT scans) to generate precise 3D scaffold geometries that conform to patient-specific anatomical requirements.
    2. Combined with BioJS (an open-source JavaScript library for biological data visualization) or other open-source bioinformatics tools to design, analyze, and simulate peptide sequences for gellant functionalization to optimize cell interaction.
    3. Combined with OpenSCAD, an open-source solid 3D CAD modeller, for designing intricate and reproducible 3D bioprinting scaffold architectures, including porous structures and complex geometries suitable for tissue regeneration.
flowchart LR
    A[Isosorbide-Capped Amide Gellant (Biocompatible, Functionalized)] --> B{Bio-Ink Formulation};
    C[Biocompatible Curable Monomers] --> B;
    D[Low-Intensity/Visible Light Photoinitiator] --> B;
    E[Live Cells (Optional)] --> B;
    B --> F[3D Bioprinter (Extrusion/DLP)];
    F --> G[Layer-by-Layer Deposition];
    G --> H[Low-Energy UV/Visible Light Curing];
    H --> I[3D Bioprinted Scaffold/Tissue Construct];

Derivative 6: Agricultural Seed Coating & Encapsulation (Cross-Domain Application)

  • Enabling Description: A curable coating composition adapted for agricultural seed treatment and delivery, incorporating the isosorbide-capped amide gellant of US8772416. The gellant provides structural integrity, adhesion to the seed surface, and controlled-release properties to the coating. The composition includes biodegradable curable waxes (e.g., functionalized polylactic acid wax, or acrylated derivatives of plant oils like soybean oil), UV-curable monomers (e.g., bio-based acrylates derived from lactic acid or other bio-esters), a photoinitiator, and active agricultural agents (e.g., slow-release fertilizers, systemic fungicides, insecticides, or plant growth regulators) acting as the "colorant" or functional payload. The method involves jetting this curable coating onto individual seeds or clusters of seeds in a targeted imagewise pattern. Subsequent UV radiation cures the coating, forming a durable, weather-resistant, yet biodegradable protective layer that precisely encapsulates the active agents for controlled release upon germination or soil interaction.
  • Combination Prior Art Scenarios:
    1. Combined with OpenHAB (open-source home automation software) adapted for precision agriculture, to monitor environmental conditions (e.g., soil moisture, temperature, pH) and correlate them with empirical data to predict optimal timing for seed coating degradation and active agent release.
    2. Combined with Open-source standards for drone-based agricultural mapping (e.g., output formats from Pix4D Mapper or Agisoft Metashape) to precisely map and track the distribution of coated seeds across fields, enabling correlation with crop yield and health data.
    3. Combined with Ag-Data-Cube, an open-source platform for agricultural data management and analysis, to track and manage comprehensive data associated with specific seed coating formulations, application rates, and their performance metrics over crop cycles.
graph LR
    A[Seed Substrate] --> B{Curable Coating Formulation};
    B --> C[Isosorbide-Capped Gellant];
    B --> D[Biodegradable Curable Wax];
    B --> E[Bio-Based Monomers];
    B --> F[Photoinitiator];
    B --> G[Agricultural Active Agents (e.g., Nutrients, Pesticides)];
    B --> H[Jetting Application (Precision Seed Coater)];
    H --> I[UV Curing];
    I --> J[Coated Seed (Functionalized & Protected)];

Derivative 7: AI-Driven Ink Formulation Optimization (Integration with Emerging Tech)

  • Enabling Description: An ink jet printing system employing a curable solid ink containing the isosorbide-capped amide gellant, where an AI-driven optimization module dynamically adjusts the precise proportions of ink components (curable wax, monomers, gellant, photoinitiator, optional non-curable components, colorant) in real-time or prior to a print job. This module utilizes advanced machine learning algorithms (e.g., reinforcement learning, Bayesian optimization, or neural networks) trained on extensive empirical data correlating ink composition, environmental conditions (temperature, humidity), substrate characteristics, printer performance (jetting frequency, drop volume), and desired print quality metrics (adhesion, scratch resistance, gloss uniformity, color accuracy, rheological stability, cure speed). Based on these inputs, the AI autonomously recommends and controls the mixing ratios from modular ink reservoirs, thereby ensuring optimal print performance, reduced material waste, and extended printhead lifespan. The system can predict the exact gellant concentration required to maintain the desired rheological profile at varying jetting temperatures, building upon the rheology data exemplified in FIG. 4 and FIG. 5.
  • Combination Prior Art Scenarios:
    1. Combined with TensorFlow or PyTorch (open-source machine learning libraries) for developing, training, and deploying the AI optimization algorithms that analyze complex ink chemistry and print dynamics.
    2. Combined with MQTT (Message Queuing Telemetry Transport), an open-source lightweight messaging protocol, for robust, real-time data exchange between IoT sensors embedded in the printer, ink reservoirs, and the AI optimization module for continuous feedback loops.
    3. Combined with OpenCV (open-source computer vision library) for real-time, in-line print quality inspection, allowing the AI system to receive immediate visual feedback for iterative optimization and defect correction.
graph TD
    A[Input: Print Job Requirements (Substrate, Quality, Speed)] --> B{AI Optimization Module};
    C[Real-time Sensor Data (Ambient Temp/Humidity, Ink Viscosity/Temp)] --> B;
    B -- Optimized Ink Composition Ratios --> D[Automated Ink Mixing & Dispensing Unit];
    D -- Formulated Ink --> E[Ink Jet Print Head];
    E --> F[Print Substrate];
    F --> G[UV Curing System (Adjustable Intensity)];
    G --> H[Output: Cured Image];
    H -- Quality Feedback (e.g., Vision System) --> C;

Derivative 8: IoT Sensors for Real-time Ink State Monitoring (Integration with Emerging Tech)

  • Enabling Description: A curable solid ink cartridge designed for ink jet printing systems, containing the isosorbide-capped amide gellant ink, wherein the cartridge is equipped with integrated, low-power IoT sensors. These sensors continuously monitor critical physical and chemical parameters of the ink, including real-time viscosity (e.g., using micro-resonators), temperature, localized UV reactivity index (e.g., by initiating a minute, localized polymerization event and measuring reaction kinetics), and pigment dispersion stability (e.g., via optical scattering). Data from these sensors is processed locally via edge computing and transmitted wirelessly (e.g., via Bluetooth Low Energy, Zigbee, or Wi-Fi) to a central printer controller or cloud-based platform. This real-time monitoring enables predictive maintenance, dynamic adjustment of print parameters (e.g., jetting waveform, heater temperatures), alerts for impending ink degradation, and automated reordering. The gellant's phase-change behavior (gelling/melting profile, as shown in FIG. 4 and FIG. 5) is specifically tracked to ensure consistent thermal stability and optimal jetting performance.
  • Combination Prior Art Scenarios:
    1. Combined with Apache Kafka (open-source distributed streaming platform) for scalable ingestion and processing of high-volume, real-time sensor data streams emanating from multiple ink cartridges and printing devices.
    2. Combined with Grafana (open-source data visualization and monitoring tool) for creating interactive dashboards and alert systems, providing operators and maintenance personnel with clear, real-time insights into ink status and system health.
    3. Combined with The Open Group Sensor Web Enablement (SWE) standards for ensuring semantic interoperability and standardized data formats for sensor observations, enabling seamless integration with diverse IoT ecosystems.
sequenceDiagram
    participant InkCartridgeIoT as Ink Cartridge (with IoT Sensors)
    participant EdgeGateway as Edge Gateway
    participant CloudPlatform as Cloud Platform (Data Analytics & AI)
    participant PrinterController as Printer Controller
    participant OperatorInterface as Operator Interface

    InkCartridgeIoT->>EdgeGateway: Transmit Sensor Data (Viscosity, Temp, Reactivity, Dispersion)
    EdgeGateway->>CloudPlatform: Forward Aggregated Data (via MQTT/HTTP)
    CloudPlatform->>CloudPlatform: Analyze, Predict, Identify Anomalies
    CloudPlatform->>PrinterController: Send Optimized Print Parameters / Alerts
    PrinterController->>InkCartridgeIoT: Adjust Heater Power / Jetting Settings
    CloudPlatform->>OperatorInterface: Display Dashboard / Send Critical Alerts
    OperatorInterface->>PrinterController: Manual Intervention / Acknowledge Alerts

Derivative 9: Temporary, Degradable Curable Ink (The "Inverse" or Failure Mode)

  • Enabling Description: A temporary curable solid ink composition for applications requiring controlled degradation or temporary imaging, employing an isosorbide-capped amide gellant. The gellant's inherent bio-renewable nature is augmented by incorporating monomers and curable waxes specifically chosen for their environmental degradability or photosensitive lability. For instance, the monomers could feature hydrolyzable ester or amide linkages, or photosensitive o-nitrobenzyl esters or acetals within their structure. The photoinitiator system is designed for rapid depletion or degradation post-curing, preventing long-term photostability. This ink, once jetted and cured, exhibits initial mechanical robustness (e.g., MEK rub resistance for a specified duration) but progressively loses integrity, fades, or becomes soluble upon exposure to specific external stimuli (e.g., ambient UV light, elevated humidity, enzymatic activity, or a mild chemical solvent wash). The degradation products are designed to be non-toxic and environmentally benign, making it suitable for disposable signage, temporary security markings, or eco-friendly packaging.
  • Combination Prior Art Scenarios:
    1. Combined with Open-source spectrophotometry software (e.g., Specview or ImageJ with color analysis plugins) for quantitative monitoring of the degradation rate, color fading, and changes in optical density over time and under various environmental conditions.
    2. Combined with ASTM D6400 (Standard Specification for Labeling of Plastics Designed to be Aerobically Composted in Municipal or Industrial Facilities) and ISO 17088 (Specifications for compostable plastics) to certify the compostability and biodegradability of the cured ink film after its temporary lifespan.
    3. Combined with the GNU Scientific Library (GSL), an open-source numerical library, to model the complex reaction kinetics of the degradable components within the ink under various environmental stressors (e.g., UV irradiance, moisture levels) to predict degradation timelines.
stateDiagram-v2
    state "Liquid Ink (Jetting)" as LiquidInk
    state "Solid Ink (Post-Jetting, Pre-Cure)" as SolidInk
    state "Cured Image (Initial Stability)" as CuredStable
    state "Degrading Image (Stimuli-Activated/Time-Dependent)" as DegradingImage
    state "Degraded Components (Non-Toxic)" as DegradedOutput

    LiquidInk --> SolidInk: Cooling (Isosorbide Gellant Action)
    SolidInk --> CuredStable: UV Curing (Rapid, Photoinitiator)
    CuredStable --> DegradingImage: Environmental Stimuli (UV, Humidity, Solvent)
    CuredStable --> DegradingImage: Time (Inherent Component Degradation)
    DegradingImage --> DegradedOutput: Complete Degradation

Derivative 10: Low-Power Curing Curable Ink System (The "Inverse" or Failure Mode - Energy Efficiency)

  • Enabling Description: A method of ink jet printing an image utilizing a curable solid ink, comprising the isosorbide-capped amide gellant, optimized for extremely low-energy UV-LED curing. The ink composition is engineered to feature highly reactive, multi-functional monomers (e.g., fast-curing urethane acrylates or highly functionalized acrylic oligomers designed for high crosslinking density) and a highly efficient photoinitiator system (e.g., synergistic blends of Type I and Type II photoinitiators, or novel initiators with high molar absorptivity at specific UV-LED wavelengths, such as 385 nm or 395 nm). The method involves jetting the ink at standard temperatures (70-100°C), followed by immediate exposure to a low-power UV-LED array (e.g., radiant power output < 100 mW/cm² or even < 50 mW/cm²) operating at a specific, narrow wavelength, while moving at relatively high speeds. The gellant ensures rapid gelling post-jetting, providing sufficient green strength before the low-power cure. This system achieves complete cure with minimal energy input, extending battery life in portable printers, reducing operational costs, and minimizing heat impact on sensitive substrates.
  • Combination Prior Art Scenarios:
    1. Combined with Open Source Hardware (OSHWA) certified designs for low-power UV-LED arrays or specialized UV-LED driver electronics, enabling the integration of energy-efficient curing solutions into novel printer architectures.
    2. Combined with Energy Star program specifications for ink jet printers to provide a recognized framework for quantifying, certifying, and communicating the energy efficiency of the low-power curing system.
    3. Combined with Zephyr Project (an open-source RTOS for constrained devices) to manage power consumption, process sensor data, and control the low-power UV-LED curing parameters on embedded systems within compact or portable ink jet printing devices.
flowchart TD
    A[Ink Formulation (High Reactivity Monomers, Efficient PI)] --> B[Ink Jetting (Standard Temp, e.g., 90°C)];
    B --> C[Print Substrate];
    C --> D[Low-Power UV-LED Curing (<100 mW/cm², Specific λ)];
    D --> E[Cured Image (Energy Efficient)];
    E --> F[Application: Portable Devices, Sensitive Substrates];

Generated 6/6/2026, 8:25:04 AM