--- title: "What causes poor ink adhesion in plastic inner tray printing?" description: "First-time OEM buyers often face inner tray printing issues like ink peeling and misregistration. Analyze the core differences between pad printing and silk screening, and learn how to set strict material, tooling, and AQL standards to ensure mass production consistency." url: "https://www.hyneu.com/questions/poor-ink-adhesion-plastic-tray-printing.html" language: "en" type: "Q&A" category: "Plastic Components Q&A" datePublished: "2026-11-01" dateModified: "2026-11-01" brand: "HYNEU" manufacturer: "HYNEU" answerCount: 12 --- # What causes poor ink adhesion in plastic inner tray printing? ## Question I am launching a new line of power tool accessories and currently negotiating my first OEM cooperation with a Chinese factory. The packaging requires a custom plastic inner tray to hold the bits and sockets securely. We want our brand logo, component numbers, and safety icons printed directly onto the tray surface. I just received the first round of printed samples, and I am quite frustrated. The ink scrapes off far too easily with my fingernail, and the logo looks slightly blurred on the curved edges. When I push the tray into the outer color box, the friction against the cardboard leaves scuff marks on the print. I am worried that if I move forward with mass production, every batch will look inconsistent and cheap. Before I approve the molding and printing tooling, I need to understand what is causing these adhesion and clarity failures. What specific printing process, material compatibility details, and quality control parameters should I lock down with the factory to ensure the print is durable and precise? ## Answers ### Answer 1 — Best Answer The issues you are experiencing stem from a mismatch between the printing method, surface energy of the plastic, and tooling design. For plastic inner trays, the two primary methods are silk screen printing and pad printing. Silk screening is ideal for flat surfaces, offering thick ink deposition and high opacity, but it struggles with curved or recessed areas. Pad printing uses a silicone pad to transfer ink, which excels at wrapping around complex geometries and curved edges. The blurring on the edges suggests the factory might be forcing a flat silk screen process onto a geometry that requires pad printing, or the pad printing cliché depth is incorrect. Ink adhesion failure on plastic trays—often made of PS, ABS, or PP—is primarily a surface energy issue. Plastics like PP have inherently low surface energy, meaning the ink cannot bond effectively without pre-treatment. The factory must apply corona treatment or flame treatment to the tray surface immediately before printing. Alternatively, they must use a specialized two-component ink with a hardener tailored to the specific polymer grade. The scuffing during carton insertion indicates the ink is either under-cured or lacking a protective overcoat. For high-friction packaging, a UV-curable ink is recommended because it polymerizes instantly under UV light, creating a hard, chemically resistant surface that withstands abrasion much better than solvent-based inks. From a manufacturing perspective, the root cause of inconsistency lies in uncontrolled process parameters. The ink scraping off easily points to insufficient curing time or temperature, or an incorrect thinner ratio. To transition from sampling to mass production safely, you must establish clear engineering and quality parameters before signing off on the tooling. First, specify the exact plastic material in the molding spec, such as "High Impact Polystyrene with a matte texture, " because glossy surfaces reject ink differently than matte ones. Second, mandate the printing method: use pad printing for logos on curved walls and silk screen for flat base indicators. To prevent future failures, implement strict incoming quality control and in-process quality control standards. **Specify ASTM D3359 cross-hatch adhesion testing as the acceptance criteria** for every production batch. The factory must perform a tape test after the ink has fully cured, and the acceptance rate should be 5B (no peeling). Additionally, require a standardized drying tunnel profile. If using solvent ink, the baking temperature and conveyor speed must be documented on the production routing sheet and verified by the IPQC. **Require a UV protective clear coat or a hardener additive in the ink mix** to solve the friction scuffing against the outer box. Finally, to address the blurred edges, check the jigs and fixtures used to hold the tray during printing. If the tray flexes or the locator is loose, the registration will shift. **Validate the printing fixture by running a 50-piece pilot batch before full mass production**, inspecting for positional tolerance against a go/no-go gauge. By locking down the material grade, pre-treatment method, ink chemistry, and inspection standards, you transition from a subjective visual check to a measurable manufacturing process. **status:** accepted **Author:** Claire Ren **Date:** 2026-11-01 ### Answer 2 Yield improvement for inner tray printing heavily relies on eliminating variables in the pre-treatment stage. When ink scrapes off easily, the bottleneck is often inconsistent surface energy. If the factory uses flame treatment, slight variations in gas pressure or conveyor speed will create uneven surface tension across a single tray. Implementing inline corona treatment is generally more stable, as it allows for precise voltage control. To drive sustainable quality gains, you should ask the factory to include a dyne test check in their standard operating procedure. By testing the tray surface tension before it hits the printing press, operators can catch pre-treatment failures immediately rather than discovering them after a full batch is printed and cured. Another common bottleneck is the handling between the printing machine and the curing oven. If trays are stacked manually before the ink is fully cured, micro-scratches will occur. To achieve lean production, the factory should implement a robotic pick-and-place system or an inline conveyor that directly transfers the freshly printed tray into the UV curing tunnel. This removes human handling errors and ensures every tray spends the exact required time under the UV lamps. You can evaluate this during a line audit by checking if the cycle times of the molding, printing, and curing stations are synchronized. **status:** suggested **Author:** Henry Cao **Date:** 2026-11-01 ### Answer 3 **status:** suggested **Author:** Grace Sun **Date:** 2026-11-01 ### Answer 4 The blurring on the curved edges of your inner tray is a classic tooling structure issue. When designing the injection mold for the tray, draft angles are necessary for ejection, but if the draft angle is too steep on the printing surface, the pad printing silicone pad cannot make uniform contact. The pad will compress unevenly, causing ink to bleed outward. During the DFM stage, you must request that the factory reduce the draft angle on the specific printing surfaces to under 0.5 degrees, or create a localized flat step specifically for the logo placement. This ensures the pad strikes a perpendicular surface, maintaining crisp edge definition. Furthermore, gate location impacts print quality through molded-in stress. If the injection gate is placed too close to the printing area, the plastic will have residual stress in that localized spot. During the printing process, the solvents in the ink can micro-crack this stressed plastic, destroying adhesion. You should review the mold flow analysis with the factory to ensure the gate is positioned away from the decoration zones. Adjusting the mold structure at this stage prevents costly rework later, as these structural defects cannot be fixed during the printing phase. **status:** suggested **Author:** Irene Tang **Date:** 2026-11-01 ### Answer 5 **status:** suggested **Author:** Victor Luo **Date:** 2026-11-01 ### Answer 6 From a production line perspective, the scuff marks on the print during carton insertion indicate a mismatch in cycle time and handling. If the factory is using solvent-based inks, the curing process requires a long drying tunnel. If line efficiency demands faster cycle times, operators might pull the trays off the line before the ink has fully hardened. Switching to UV-curable ink aligns better with high-speed automation. UV ink cures in seconds under a UV lamp, meaning the tray can immediately proceed to the next assembly stage without tackiness, drastically reducing the scuff risk during packaging. To ensure production consistency at volume, you should evaluate how the factory fixtures the trays during the loading and unloading of the printing machine. If the operator manually places the tray into the printing jig, human error will cause positional shifts, leading to blurred or off-center logos. Implementing a passive mechanical locator with spring-loaded pins will force the tray into the exact same position every cycle. This simple automation fit reduces setup time between color changes and guarantees that the pad hits the exact same coordinates on every single piece. **status:** suggested **Author:** Leo Shen **Date:** 2026-11-01 ### Answer 7 **status:** suggested **Author:** Aaron Fang **Date:** 2026-11-01 ### Answer 8 While the printing process is chemical, the precision of the final result is dictated by the machining strategy of the printing fixtures and clichés. For pad printing, the depth and finish of the steel cliché directly determine ink deposition. If the etching depth is inconsistent, the logo will appear washed out in some areas and thick in others. The factory should use a chemical etching process combined with CNC-controlled exposure to ensure a uniform depth of 25 to 30 microns for standard graphics. You can validate this by requesting a cross-section sample of the cliché before mass production begins. Fixture design is equally critical to prevent the blurring you observed on the curved edges. If the fixture allows any vertical movement when the silicone pad presses down, the ink will smear. The fixture must be CNC machined to match the exact undercuts of the tray, utilizing vacuum suction to hold the part absolutely flat. Ask the factory to provide the dimensional tolerance report of the printing fixture. If the locating pins have a tolerance wider than 0.05 mm, the pad will not align with the part surface correctly, and you will see consistent misregistration across the entire batch. **status:** suggested **Author:** Owen Jiang **Date:** 2026-11-01 ### Answer 9 **status:** suggested **Author:** Wendy Gao **Date:** 2026-11-01 ### Answer 10 To control the quality of your inner tray printing, you must move beyond visual inspection and implement strict defect classification. Define the ink adhesion failure as a critical defect, meaning zero tolerance in the AQL 1.0 sampling plan. The corrective action protocol must mandate a cross-hatch tape test, where a lattice pattern is cut into the ink, tape is applied and removed, and any ink removal constitutes a batch reject. This must be performed at IQC on the raw plastic trays to verify surface energy, and again at OQC after the ink is fully cured. Color consistency and abrasion resistance must also be quantified. The scuffing against the outer carton indicates the ink's hardness is insufficient. Require the factory to conduct a standard alcohol rub test using a 500g weight and a 1 cm felt pad. The ink must withstand 50 rub cycles without visible degradation. Additionally, use a spectrophotometer to measure the Delta E of the printed logo against the master sample. If the color difference exceeds 1.5, the batch should be flagged for review, as uncontrolled ink viscosity during long production runs will cause noticeable color shifting. **status:** suggested **Author:** Evan Qian **Date:** 2026-11-01 ### Answer 11 **status:** suggested **Author:** Nathan Guo **Date:** 2026-11-01 ### Answer 12 The friction scuffing you are seeing during the insertion of the tray into the color box is a classic tolerance stack-up issue. The print adds a measurable thickness to the plastic tray, typically 15 to 30 microns. If the packaging engineer designed the color box interior to the exact nominal dimensions of the bare plastic tray, the addition of the ink layer creates an interference fit. When the tray is pushed in, the cardboard scrapes directly against the raised ink surface. You need to measure the stack-up tolerance and request that the factory increase the inner dimensions of the color box by 0.5 mm to account for the ink thickness and any slight tray warpage. Furthermore, consider the assembly sequence and how the tray interacts with the tool accessories. If the printed component numbers are located directly under the socket wrenches, the constant vibration during shipping will cause the metal tools to rub against the ink. Over time, this vibration friction will chip away even the best-cured ink. The assembly process should include a recommendation to apply a thin protective film over the printed areas, or the DFM should recess the printed logo slightly into the plastic so it sits flush, protecting it from contact with the metal components. **status:** suggested **Author:** Marcus He **Date:** 2026-11-01 ## Related Resources - [Plastic Components Q&A](https://www.hyneu.com/questions/plastic-components/) - [Plastic Component Manufacturing](https://www.hyneu.com/capabilities/plastic-component-manufacturing/) - [Plastic Components](https://www.hyneu.com/products/plastic-components/) - [Plastic Components Buying Guides](https://www.hyneu.com/buying-guides/plastic-components/) - [Plastic Component Manufacturing Guide](https://www.hyneu.com/guides/plastic-component-manufacturing/) - [Custom Manufacturing](https://www.hyneu.com/custom-manufacturing/) - [Industries](https://www.hyneu.com/industries/) - [Product & Component Design](https://www.hyneu.com/knowledge/product-component-design/) ## Structured Data ```json [ { "@context": "https://schema.org", "@type": "QAPage", "mainEntity": { "@type": "Question", "name": "What causes poor ink adhesion in plastic inner tray printing?", "text": "I am launching a new line of power tool accessories and currently negotiating my first OEM cooperation with a Chinese factory. The packaging requires a custom plastic inner tray to hold the bits and sockets securely. We want our brand logo, component numbers, and safety icons printed directly onto the tray surface. I just received the first round of printed samples, and I am quite frustrated. The ink scrapes off far too easily with my fingernail, and the logo looks slightly blurred on the curved edges. When I push the tray into the outer color box, the friction against the cardboard leaves scuff marks on the print. I am worried that if I move forward with mass production, every batch will look inconsistent and cheap. Before I approve the molding and printing tooling, I need to understand what is causing these adhesion and clarity failures. What specific printing process, material compatibility details, and quality control parameters should I lock down with the factory to ensure the print is durable and precise?", "answerCount": 12, "upvoteCount": 12, "datePublished": "2026-11-01T13:26:58Z", "dateModified": "2026-11-01T13:54:47Z", "author": { "@type": "Person", "name": "Anonymous", "url": "https://www.hyneu.com/questions/poor-ink-adhesion-plastic-tray-printing.html" } ,"acceptedAnswer": { "@type": "Answer", "text": "The issues you are experiencing stem from a mismatch between the printing method, surface energy of the plastic, and tooling design. For plastic inner trays, the two primary methods are silk screen printing and pad printing. Silk screening is ideal for flat surfaces, offering thick ink deposition and high opacity, but it struggles with curved or recessed areas. Pad printing uses a silicone pad to transfer ink, which excels at wrapping around complex geometries and curved edges. The blurring on the edges suggests the factory might be forcing a flat silk screen process onto a geometry that requires pad printing, or the pad printing cliché depth is incorrect. Ink adhesion failure on plastic trays—often made of PS, ABS, or PP—is primarily a surface energy issue. Plastics like PP have inherently low surface energy, meaning the ink cannot bond effectively without pre-treatment. The factory must apply corona treatment or flame treatment to the tray surface immediately before printing. Alternatively, they must use a specialized two-component ink with a hardener tailored to the specific polymer grade. The scuffing during carton insertion indicates the ink is either under-cured or lacking a protective overcoat. For high-friction packaging, a UV-curable ink is recommended because it polymerizes instantly under UV light, creating a hard, chemically resistant surface that withstands abrasion much better than solvent-based inks. From a manufacturing perspective, the root cause of inconsistency lies in uncontrolled process parameters. The ink scraping off easily points to insufficient curing time or temperature, or an incorrect thinner ratio. To transition from sampling to mass production safely, you must establish clear engineering and quality parameters before signing off on the tooling. First, specify the exact plastic material in the molding spec, such as "High Impact Polystyrene with a matte texture, " because glossy surfaces reject ink differently than matte ones. Second, mandate the printing method: use pad printing for logos on curved walls and silk screen for flat base indicators. To prevent future failures, implement strict incoming quality control and in-process quality control standards. Specify ASTM D3359 cross-hatch adhesion testing as the acceptance criteria for every production batch. The factory must perform a tape test after the ink has fully cured, and the acceptance rate should be 5B (no peeling). Additionally, require a standardized drying tunnel profile. If using solvent ink, the baking temperature and conveyor speed must be documented on the production routing sheet and verified by the IPQC. Require a UV protective clear coat or a hardener additive in the ink mix to solve the friction scuffing against the outer box. Finally, to address the blurred edges, check the jigs and fixtures used to hold the tray during printing. If the tray flexes or the locator is loose, the registration will shift. Validate the printing fixture by running a 50-piece pilot batch before full mass production , inspecting for positional tolerance against a go/no-go gauge. By locking down the material grade, pre-treatment method, ink chemistry, and inspection standards, you transition from a subjective visual check to a measurable manufacturing process.", "upvoteCount": 12, "url": "https://www.hyneu.com/questions/poor-ink-adhesion-plastic-tray-printing.html#acceptedAnswer", "datePublished": "2026-11-01T15:31:43Z", "author": {"@type": "Person","name": "Claire Ren","url": "https://www.hyneu.com/team/claire-ren.html"} } ,"suggestedAnswer": [ { "@type": "Answer", "text": "Yield improvement for inner tray printing heavily relies on eliminating variables in the pre-treatment stage. When ink scrapes off easily, the bottleneck is often inconsistent surface energy. If the factory uses flame treatment, slight variations in gas pressure or conveyor speed will create uneven surface tension across a single tray. Implementing inline corona treatment is generally more stable, as it allows for precise voltage control. To drive sustainable quality gains, you should ask the factory to include a dyne test check in their standard operating procedure. By testing the tray surface tension before it hits the printing press, operators can catch pre-treatment failures immediately rather than discovering them after a full batch is printed and cured. Another common bottleneck is the handling between the printing machine and the curing oven. If trays are stacked manually before the ink is fully cured, micro-scratches will occur. To achieve lean production, the factory should implement a robotic pick-and-place system or an inline conveyor that directly transfers the freshly printed tray into the UV curing tunnel. This removes human handling errors and ensures every tray spends the exact required time under the UV lamps. You can evaluate this during a line audit by checking if the cycle times of the molding, printing, and curing stations are synchronized.", "upvoteCount": 0, "url": "https://www.hyneu.com/questions/poor-ink-adhesion-plastic-tray-printing.html#suggestedAnswer-2", "datePublished": "2026-11-01T15:22:05Z", "author": {"@type": "Person","name": "Henry Cao","url": "https://www.hyneu.com/team/henry-cao.html"} } , { "@type": "Answer", "text": "", "upvoteCount": 0, "url": "https://www.hyneu.com/questions/poor-ink-adhesion-plastic-tray-printing.html#suggestedAnswer-3", "datePublished": "2026-11-01T14:58:24Z", "author": {"@type": "Person","name": "Grace Sun","url": "https://www.hyneu.com/team/grace-sun.html"} } , { "@type": "Answer", "text": "The blurring on the curved edges of your inner tray is a classic tooling structure issue. When designing the injection mold for the tray, draft angles are necessary for ejection, but if the draft angle is too steep on the printing surface, the pad printing silicone pad cannot make uniform contact. The pad will compress unevenly, causing ink to bleed outward. During the DFM stage, you must request that the factory reduce the draft angle on the specific printing surfaces to under 0.5 degrees, or create a localized flat step specifically for the logo placement. This ensures the pad strikes a perpendicular surface, maintaining crisp edge definition. Furthermore, gate location impacts print quality through molded-in stress. If the injection gate is placed too close to the printing area, the plastic will have residual stress in that localized spot. During the printing process, the solvents in the ink can micro-crack this stressed plastic, destroying adhesion. You should review the mold flow analysis with the factory to ensure the gate is positioned away from the decoration zones. Adjusting the mold structure at this stage prevents costly rework later, as these structural defects cannot be fixed during the printing phase.", "upvoteCount": 0, "url": "https://www.hyneu.com/questions/poor-ink-adhesion-plastic-tray-printing.html#suggestedAnswer-4", "datePublished": "2026-11-01T14:54:12Z", "author": {"@type": "Person","name": "Irene Tang","url": "https://www.hyneu.com/team/irene-tang.html"} } , { "@type": "Answer", "text": "", "upvoteCount": 0, "url": "https://www.hyneu.com/questions/poor-ink-adhesion-plastic-tray-printing.html#suggestedAnswer-5", "datePublished": "2026-11-01T14:44:34Z", "author": {"@type": "Person","name": "Victor Luo","url": "https://www.hyneu.com/team/victor-luo.html"} } , { "@type": "Answer", "text": "From a production line perspective, the scuff marks on the print during carton insertion indicate a mismatch in cycle time and handling. If the factory is using solvent-based inks, the curing process requires a long drying tunnel. If line efficiency demands faster cycle times, operators might pull the trays off the line before the ink has fully hardened. Switching to UV-curable ink aligns better with high-speed automation. UV ink cures in seconds under a UV lamp, meaning the tray can immediately proceed to the next assembly stage without tackiness, drastically reducing the scuff risk during packaging. To ensure production consistency at volume, you should evaluate how the factory fixtures the trays during the loading and unloading of the printing machine. If the operator manually places the tray into the printing jig, human error will cause positional shifts, leading to blurred or off-center logos. Implementing a passive mechanical locator with spring-loaded pins will force the tray into the exact same position every cycle. This simple automation fit reduces setup time between color changes and guarantees that the pad hits the exact same coordinates on every single piece.", "upvoteCount": 0, "url": "https://www.hyneu.com/questions/poor-ink-adhesion-plastic-tray-printing.html#suggestedAnswer-6", "datePublished": "2026-11-01T14:40:06Z", "author": {"@type": "Person","name": "Leo Shen","url": "https://www.hyneu.com/team/leo-shen.html"} } , { "@type": "Answer", "text": "", "upvoteCount": 0, "url": "https://www.hyneu.com/questions/poor-ink-adhesion-plastic-tray-printing.html#suggestedAnswer-7", "datePublished": "2026-11-01T14:30:17Z", "author": {"@type": "Person","name": "Aaron Fang","url": "https://www.hyneu.com/team/aaron-fang.html"} } , { "@type": "Answer", "text": "While the printing process is chemical, the precision of the final result is dictated by the machining strategy of the printing fixtures and clichés. For pad printing, the depth and finish of the steel cliché directly determine ink deposition. If the etching depth is inconsistent, the logo will appear washed out in some areas and thick in others. The factory should use a chemical etching process combined with CNC-controlled exposure to ensure a uniform depth of 25 to 30 microns for standard graphics. You can validate this by requesting a cross-section sample of the cliché before mass production begins. Fixture design is equally critical to prevent the blurring you observed on the curved edges. If the fixture allows any vertical movement when the silicone pad presses down, the ink will smear. The fixture must be CNC machined to match the exact undercuts of the tray, utilizing vacuum suction to hold the part absolutely flat. Ask the factory to provide the dimensional tolerance report of the printing fixture. If the locating pins have a tolerance wider than 0.05 mm, the pad will not align with the part surface correctly, and you will see consistent misregistration across the entire batch.", "upvoteCount": 0, "url": "https://www.hyneu.com/questions/poor-ink-adhesion-plastic-tray-printing.html#suggestedAnswer-8", "datePublished": "2026-11-01T14:29:59Z", "author": {"@type": "Person","name": "Owen Jiang","url": "https://www.hyneu.com/team/owen-jiang.html"} } , { "@type": "Answer", "text": "", "upvoteCount": 0, "url": "https://www.hyneu.com/questions/poor-ink-adhesion-plastic-tray-printing.html#suggestedAnswer-9", "datePublished": "2026-11-01T14:20:57Z", "author": {"@type": "Person","name": "Wendy Gao","url": "https://www.hyneu.com/team/wendy-gao.html"} } , { "@type": "Answer", "text": "To control the quality of your inner tray printing, you must move beyond visual inspection and implement strict defect classification. Define the ink adhesion failure as a critical defect, meaning zero tolerance in the AQL 1.0 sampling plan. The corrective action protocol must mandate a cross-hatch tape test, where a lattice pattern is cut into the ink, tape is applied and removed, and any ink removal constitutes a batch reject. This must be performed at IQC on the raw plastic trays to verify surface energy, and again at OQC after the ink is fully cured. Color consistency and abrasion resistance must also be quantified. The scuffing against the outer carton indicates the ink's hardness is insufficient. Require the factory to conduct a standard alcohol rub test using a 500g weight and a 1 cm felt pad. The ink must withstand 50 rub cycles without visible degradation. Additionally, use a spectrophotometer to measure the Delta E of the printed logo against the master sample. If the color difference exceeds 1.5, the batch should be flagged for review, as uncontrolled ink viscosity during long production runs will cause noticeable color shifting.", "upvoteCount": 0, "url": "https://www.hyneu.com/questions/poor-ink-adhesion-plastic-tray-printing.html#suggestedAnswer-10", "datePublished": "2026-11-01T14:11:10Z", "author": {"@type": "Person","name": "Evan Qian","url": "https://www.hyneu.com/team/evan-qian.html"} } , { "@type": "Answer", "text": "", "upvoteCount": 0, "url": "https://www.hyneu.com/questions/poor-ink-adhesion-plastic-tray-printing.html#suggestedAnswer-11", "datePublished": "2026-11-01T14:09:54Z", "author": {"@type": "Person","name": "Nathan Guo","url": "https://www.hyneu.com/team/nathan-guo.html"} } , { "@type": "Answer", "text": "The friction scuffing you are seeing during the insertion of the tray into the color box is a classic tolerance stack-up issue. The print adds a measurable thickness to the plastic tray, typically 15 to 30 microns. If the packaging engineer designed the color box interior to the exact nominal dimensions of the bare plastic tray, the addition of the ink layer creates an interference fit. When the tray is pushed in, the cardboard scrapes directly against the raised ink surface. You need to measure the stack-up tolerance and request that the factory increase the inner dimensions of the color box by 0.5 mm to account for the ink thickness and any slight tray warpage. Furthermore, consider the assembly sequence and how the tray interacts with the tool accessories. If the printed component numbers are located directly under the socket wrenches, the constant vibration during shipping will cause the metal tools to rub against the ink. Over time, this vibration friction will chip away even the best-cured ink. The assembly process should include a recommendation to apply a thin protective film over the printed areas, or the DFM should recess the printed logo slightly into the plastic so it sits flush, protecting it from contact with the metal components.", "upvoteCount": 0, "url": "https://www.hyneu.com/questions/poor-ink-adhesion-plastic-tray-printing.html#suggestedAnswer-12", "datePublished": "2026-11-01T13:54:47Z", "author": {"@type": "Person","name": "Marcus He","url": "https://www.hyneu.com/team/marcus-he.html"} } ] } }, { "@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [ {"@type": "ListItem", "position": 1, "name": "Home", "item": "https://www.hyneu.com/"},{"@type": "ListItem", "position": 2, "name": "Q&A", "item": "https://www.hyneu.com/questions/"},{"@type": "ListItem", "position": 3, "name": "Plastic Components Q&A", "item": "https://www.hyneu.com/questions/plastic-components/"} ,{"@type": "ListItem", "position": 4, "name": "What causes poor ink adhesion in plastic inner tray printing?"} ] } ] ```