{"id":402,"date":"2026-04-22T09:43:12","date_gmt":"2026-04-22T09:43:12","guid":{"rendered":"https:\/\/onestepblowmachine.com\/?p=402"},"modified":"2026-04-22T09:43:12","modified_gmt":"2026-04-22T09:43:12","slug":"how-wall-thickness-uniformity-is-controlled-in-isbm-machines-and-why-%c2%b15-matters","status":"publish","type":"post","link":"https:\/\/onestepblowmachine.com\/hi\/%e0%a4%86%e0%a4%b5%e0%a5%87%e0%a4%a6%e0%a4%a8\/how-wall-thickness-uniformity-is-controlled-in-isbm-machines-and-why-%c2%b15-matters\/","title":{"rendered":"\u0906\u0908\u090f\u0938\u092c\u0940\u090f\u092e \u092e\u0936\u0940\u0928\u094b\u0902 \u092e\u0947\u0902 \u0926\u0940\u0935\u093e\u0930 \u0915\u0940 \u092e\u094b\u091f\u093e\u0908 \u0915\u0940 \u090f\u0915\u0930\u0942\u092a\u0924\u093e \u0915\u094b \u0915\u0948\u0938\u0947 \u0928\u093f\u092f\u0902\u0924\u094d\u0930\u093f\u0924 \u0915\u093f\u092f\u093e \u091c\u093e\u0924\u093e \u0939\u0948 \u2014 \u0914\u0930 \u00b15% \u0915\u094d\u092f\u094b\u0902 \u092e\u0939\u0924\u094d\u0935\u092a\u0942\u0930\u094d\u0923 \u0939\u0948"},"content":{"rendered":"
\n

\u0906\u0908\u090f\u0938\u092c\u0940\u090f\u092e \u092e\u0936\u0940\u0928\u094b\u0902 \u092e\u0947\u0902 \u0926\u0940\u0935\u093e\u0930 \u0915\u0940 \u092e\u094b\u091f\u093e\u0908 \u0915\u0940 \u090f\u0915\u0930\u0942\u092a\u0924\u093e \u0915\u094b \u0915\u0948\u0938\u0947 \u0928\u093f\u092f\u0902\u0924\u094d\u0930\u093f\u0924 \u0915\u093f\u092f\u093e \u091c\u093e\u0924\u093e \u0939\u0948 \u2014 \u0914\u0930 \u00b15% \u0915\u094d\u092f\u094b\u0902 \u092e\u0939\u0924\u094d\u0935\u092a\u0942\u0930\u094d\u0923 \u0939\u0948<\/h2>\n

For any Colombian producer evaluating a new \u0907\u0902\u091c\u0947\u0915\u094d\u0936\u0928 \u0938\u094d\u091f\u094d\u0930\u0947\u091a \u092c\u094d\u0932\u094b \u092e\u094b\u0932\u094d\u0921\u093f\u0902\u0917 \u092e\u0936\u0940\u0928<\/strong>, wall thickness uniformity is the single specification that most strongly predicts whether the finished bottle will survive retail \u2014 or come back as a warranty complaint. A 500 ml PET water bottle with a \u00b15% wall thickness variation survives drop tests, top-load compression, and cold-fill expansion without issue. The same bottle at \u00b112% variation cracks under pallet weight, fails leak testing after capping, and produces a visible thin-spot haze that kills shelf appeal. The gap between acceptable and unacceptable is narrower than most buyers realize, and it is determined almost entirely by the machine. This technical guide explains exactly how a modern one-step \u0907\u0902\u091c\u0947\u0915\u094d\u0936\u0928 \u0938\u094d\u091f\u094d\u0930\u0947\u091a \u092c\u094d\u0932\u094b \u092e\u094b\u0932\u094d\u0921\u093f\u0902\u0917 \u092e\u0936\u0940\u0928<\/strong> holds wall thickness inside \u00b15%, why that threshold matters commercially, and which HGY-class platform delivers the control Colombian cosmetic, beverage, pharma, and baby-care brands need to compete in 2026.<\/p>\n<\/div>\n

<\/p>\n

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1. Five Key Advantages of Precision Wall-Thickness Control<\/h2>\n
\n
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1. Drop-Test Survival<\/h3>\n

Bottles with wall variation inside \u00b15% survive 1-meter drop tests on tile floors with failure rates under 0.5%. The same bottle at \u00b110% variation fails drop tests at rates above 4%, producing field returns that erode brand trust.<\/p>\n<\/div>\n

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2. Top-Load Pallet Strength<\/h3>\n

Controlled wall thickness keeps top-load compression strength within 8% of theoretical, allowing 6-layer pallet stacking in Colombian warehouse operations without collapsed bottom rows.<\/p>\n<\/div>\n

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3. Resin Savings Over Time<\/h3>\n

Holding wall thickness at spec avoids the standard engineering overweight buffer of 8\u201312% that commodity producers use to compensate for wide tolerances. Better control means lower preform weight and direct resin cost savings.<\/p>\n<\/div>\n

\n

4. Premium Visual Quality<\/h3>\n

Uniform walls produce even light transmission and consistent gloss. For premium cosmetic and fragrance bottles competing on shelf, this optical consistency is what justifies the retail price premium.<\/p>\n<\/div>\n

\n

5. Regulatory Documentation<\/h3>\n

INVIMA, FDA, and EU food-contact approvals often require documented wall-thickness consistency. A servo-driven \u0907\u0902\u091c\u0947\u0915\u094d\u0936\u0928 \u0938\u094d\u091f\u094d\u0930\u0947\u091a \u092c\u094d\u0932\u094b \u092e\u094b\u0932\u094d\u0921\u093f\u0902\u0917 \u092e\u0936\u0940\u0928<\/strong> produces the repeatability data these regulators expect.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

\"precision<\/div>\n

<\/p>\n

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2. Working Principle \u2014 The Five Control Layers That Shape Wall Uniformity<\/h2>\n

Wall thickness on an \u0907\u0902\u091c\u0947\u0915\u094d\u0936\u0928 \u0938\u094d\u091f\u094d\u0930\u0947\u091a \u092c\u094d\u0932\u094b \u092e\u094b\u0932\u094d\u0921\u093f\u0902\u0917 \u092e\u0936\u0940\u0928<\/strong> is not set by a single parameter \u2014 it emerges from five interacting control layers that must all stay within tolerance at the same time. Layer 1 is preform injection geometry<\/strong>. The preform’s own wall profile, neck dimensions, and length-to-diameter ratio define the starting point. A servo-driven injection unit like the one on the HGY150-V4-EV delivers shot volumes within \u00b10.2% cycle-to-cycle, producing preforms with uniform wall distribution before they ever reach the blow station.<\/p>\n

Layer 2 is thermal conditioning.<\/strong> The 4-station layout includes a dedicated conditioning station between injection and blowing, where the preform wall temperature is equalized. Without this step, hot spots in the preform stretch more aggressively than cooler zones, producing thin-wall regions that show up as stress whitening and weak points. Servo-controlled conditioning profiles on modern ISBM platforms hold the preform temperature uniformity within \u00b11.5\u00b0C across the wall cross-section.<\/p>\n

Layer 3 is stretch-rod motion control.<\/strong> The stretch rod elongates the preform axially before compressed air expands it radially. Servo-electric rod drive delivers position feedback every 2 milliseconds, with acceleration and velocity profiles programmed in multi-stage curves. This is what separates a premium platform from a commodity machine \u2014 hydraulic stretch rods drift in position by several millimeters over a shift, producing walls that drift out of tolerance with them.<\/p>\n

Layer 4 is blow air timing.<\/strong> Pre-blow pressure, high-pressure blow timing, and exhaust sequencing are controlled by Parker high-pressure valves and YUKEN hydraulic valves on HGY-class machines. The sequence typically runs pre-blow at 0.8\u20131.2 MPa for 0.15 seconds, then high-pressure blow at 2.5\u20133.5 MPa for 1.0\u20131.5 seconds. Tighter timing control directly tightens wall-thickness control.<\/p>\n

Layer 5 is mould temperature uniformity.<\/strong> The \u0907\u0902\u091c\u0947\u0915\u094d\u0936\u0928 \u0938\u094d\u091f\u094d\u0930\u0947\u091a \u092c\u094d\u0932\u094b \u092e\u094b\u0932\u094d\u0921<\/strong> cavity temperature must remain consistent across the full surface \u2014 typically 8\u201315\u00b0C for PET, 15\u201325\u00b0C for PETG and Tritan. A dedicated mould temperature controller holds the setpoint within \u00b11\u00b0C across the cavity. Cold spots in the mould surface freeze adjacent bottle wall regions before they finish expanding, creating thickness steps that a downstream quality inspector will flag.<\/p>\n<\/div>\n

<\/p>\n

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3. Materials That Make Wall Control Possible<\/h2>\n

Precision wall-thickness control starts with the machine’s mechanical backbone. Structural frames are welded from S355JR rolled-plate steel and stress-relieved before final machining, which prevents the thermal drift that would otherwise move gear centers and cavity positions during a shift. Tie bars are forged from 42CrMo alloy and induction-hardened to resist the repeated clamping cycles that compound into position error over 10,000 shots. Lead screws are precision-ground NSK units with preloaded nuts, delivering backlash under 5 \u00b5m across the full travel \u2014 which is the single most important mechanical spec for maintaining repeatable stretch-rod position.<\/p>\n

The \u0907\u0902\u091c\u0947\u0915\u094d\u0936\u0928 \u0938\u094d\u091f\u094d\u0930\u0947\u091a \u092c\u094d\u0932\u094b \u092e\u094b\u0932\u094d\u0921<\/strong> cavities are machined from S136 stainless steel hardened to 48\u201352 HRC and polished to Ra 0.2 \u00b5m. This polish level matters because cavity surface roughness directly affects how evenly the bottle wall releases during cooling \u2014 coarse surfaces create micro-friction zones that pull the plastic thinner in some areas than others. Plasticizing screws are nitrided 38CrMoAlA with surface hardness above 950 HV, which resists wear from PET, PETG, Tritan, PPSU, and PCTG alike. Global-brand key components \u2014 Inovance or Yaskawa servo motors, Parker high-pressure valves, YUKEN hydraulic valves, Airtak pneumatic cylinders \u2014 provide the closed-loop precision that a one-step \u0907\u0902\u091c\u0947\u0915\u094d\u0936\u0928 \u0938\u094d\u091f\u094d\u0930\u0947\u091a \u092c\u094d\u0932\u094b \u092e\u094b\u0932\u094d\u0921\u093f\u0902\u0917 \u092a\u094d\u0930\u0915\u094d\u0930\u093f\u092f\u093e<\/strong> requires to hold \u00b15% wall tolerance.<\/p>\n<\/div>\n

\"ISBM<\/div>\n

<\/p>\n

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4. Application Scenarios Where Wall Uniformity Drives Commercial Success<\/h2>\n
\n
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Premium Cosmetic Bottles<\/h3>\n

30\u2013200 ml PETG dropper and serum bottles sold into Colombian premium skincare retail. Wall uniformity drives the glass-like optical appearance that justifies the premium. HGY150-V4-EV is the default platform for this segment.<\/p>\n<\/div>\n

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Pharmaceutical Containers<\/h3>\n

Liquid-medicine and syrup bottles regulated under INVIMA Resoluci\u00f3n 2674. Wall-thickness documentation is a required part of the sanitary registration dossier \u2014 tight machine control directly accelerates approval.<\/p>\n<\/div>\n

\n

Carbonated Beverage Bottles<\/h3>\n

500 ml to 2 L PET CSD bottles need controlled wall thickness to hold CO2 pressure across the distribution chain from Bogot\u00e1 to the coast. Weak wall zones cause leaks that trigger entire pallet recalls.<\/p>\n<\/div>\n

\n

Infant Feeding Bottles<\/h3>\n

Tritan and PPSU baby bottles demand uniform walls for both safety and parent-facing aesthetics. Dishwasher resistance over 2,000 cycles depends on wall thickness staying inside spec from the first shot.<\/p>\n<\/div>\n

\n

Hot-Fill Food Containers<\/h3>\n

Sauce and condiment bottles filled at 85\u201392\u00b0C rely on uniform walls to resist shrinkage distortion. Thin zones deform during cooling, causing cap-seal failures that trigger food-safety recalls.<\/p>\n<\/div>\n

\n

Large-Format Water Jugs<\/h3>\n

5-gallon and 20-liter PET water jugs served by HGY650-V4 require wall uniformity across the full bottle height. These jugs sit on dispensers under thousands of pressure cycles \u2014 any thin zone fractures within weeks of deployment.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

<\/p>\n

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5. Regulatory Landscape \u2014 Where Wall-Thickness Documentation Matters<\/h2>\n

Wall-thickness control is not just an engineering metric \u2014 it appears directly in regulatory submissions across Colombia and the export markets most Colombian producers target.<\/p>\n

Colombia:<\/strong> INVIMA Resoluci\u00f3n 2674 of 2013 on food-contact manufacturing requires documented production consistency for sanitary registration. NTC 5000 provides the plastic food-packaging technical framework. Resoluci\u00f3n 2400 of 1979 sets industrial workplace safety. RETIE governs electrical compliance for three-phase \u0907\u0902\u091c\u0947\u0915\u094d\u0936\u0928 \u0938\u094d\u091f\u094d\u0930\u0947\u091a \u092c\u094d\u0932\u094b \u092e\u094b\u0932\u094d\u0921\u093f\u0902\u0917 \u092e\u0936\u0940\u0928\u0947\u0902<\/strong> installed on Colombian soil. ICONTEC offers coordinated international-standards certification that accelerates export documentation. Decree 2412 on Extended Producer Responsibility for packaging pushes producers toward machines whose precise wall control enables resin-lighter designs.<\/p>\n

Other Markets:<\/strong> FDA 21 CFR 177.1315, 177.1520, and 177.1580 cover copolyesters, PP, and PC food-contact applications. European Union Regulation 10\/2011 imposes migration limits that correlate with wall-thickness consistency. Commission Directive 2011\/8\/EU restricts BPA in infant-feeding bottles. Japanese JFSL 370 applies for Asian exports. Brazilian ANVISA RDC 52\/2010 governs plastic food containers across the Mercosur market. Mexican CoFEPRIS aligns with FDA standards. Australia and New Zealand reference AS 2070. Machine-side quality is anchored in ISO 9001:2015 and ISO 14001 certification, with USP Class VI added for medical-grade PPSU production.<\/p>\n<\/div>\n

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\u0915\u093e\u0930\u094d\u092f\u0936\u093e\u0932\u093e<\/h3>\n
\n
\"ISBM
\n\"ISBM
\n\"ISBM
\n\"ISBM<\/div>\n<\/div>\n<\/div>\n

<\/p>\n

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6. Related Components \u2014 Supporting the Precision Line<\/h2>\n

Wall-uniformity-critical production depends on peripheral components that maintain precision as reliably as the \u0907\u0902\u091c\u0947\u0915\u094d\u0936\u0928 \u0938\u094d\u091f\u094d\u0930\u0947\u091a \u092c\u094d\u0932\u094b \u092e\u094b\u0932\u094d\u0921\u093f\u0902\u0917 \u092e\u0936\u0940\u0928<\/strong> itself. Pairing machine and peripherals from a single supplier consolidates commissioning and keeps the whole line’s precision tolerances in sync.<\/p>\n

\n
\n

Rigid Couplings for Drive Alignment<\/h3>\n

Precision alignment between compressor, feeder, and mould-temp-controller drives benefits from zero-backlash Rigid Coupling<\/a> hardware. Backlash in any shaft connection propagates into the ISBM cycle timing and eventually into wall-thickness variation on the finished bottle.<\/p>\n

\"rigid<\/p>\n<\/div>\n

\n

Industrial Gearboxes for Peripherals<\/h3>\n

Conveyor, packing-line, and feeder gearboxes supporting the ISBM main machine need reducer consistency matching the cycle rate of the HGY platform. Peripheral equipment gear ratios and output speeds directly affect downstream bottle handling precision.<\/p>\n

\"\u0935\u0928\u0938\u094d\u091f\u0947\u092a\u092c\u094d\u0932\u094b\u092e\u0936\u0940\u0928-HGY50-V3-EV\"<\/p>\n<\/div>\n<\/div>\n

<\/div>\n<\/div>\n

<\/p>\n

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\u0905\u0915\u094d\u0938\u0930 \u092a\u0942\u091b\u0947 \u091c\u093e\u0928\u0947 \u0935\u093e\u0932\u0947 \u092a\u094d\u0930\u0936\u094d\u0928\u094b\u0902<\/h2>\n
\nQ1. Which injection stretch blow moulding machine supplier guarantees \u00b15% wall thickness control for Colombian cosmetic production?<\/summary>\n

A1. Serious suppliers provide a written factory acceptance test protocol that measures wall thickness at 24\u201348 sampling points per bottle and guarantees the \u00b15% tolerance before shipment. Ask for a recent FAT report from a comparable Latin American production run \u2014 that is the strongest indicator of real-world performance.<\/p>\n<\/details>\n

\nQ2. Which injection stretch blow molding machines can replace an aging hydraulic unit running loose wall tolerances at a Colombian cosmetic plant?<\/summary>\n

A2. The HGY150-V4-EV or HGYS150-V4 platforms are engineered as direct retrofit replacements. Existing ASB-12M mould tooling transfers directly, commissioning runs 10\u201314 days, and wall-thickness consistency typically tightens from \u00b18\u201310% on the legacy unit to \u00b14\u20135% on the new machine inside the first production shift.<\/p>\n<\/details>\n

\nQ3. What is the difference between hydraulic and servo-electric stretch-rod control in wall-thickness precision terms?<\/summary>\n

A3. Hydraulic stretch rods typically hold position within \u00b10.08 mm and drift 2\u20134 mm across a shift as oil temperature rises. Servo-electric rods hold \u00b10.03\u20130.05 mm with essentially zero thermal drift. That position accuracy translates directly into wall consistency \u2014 servo reliably delivers \u00b15% while hydraulic typically delivers \u00b17\u20139%.<\/p>\n<\/details>\n

\nQ4. How much does a wall-thickness measurement system cost for factory acceptance testing of ISBM machines in Colombia?<\/summary>\n

A4. Manual ultrasonic thickness gauges suit small producers with modest investment. Automated 48-point inline measurement systems represent a larger investment but deliver continuous production-data logging. Most Colombian producers start with manual measurement during FAT and add automated systems after the second or third production line is commissioned.<\/p>\n<\/details>\n

\nQ5. Where can I watch an injection stretch blow molding video demonstrating real-time wall-thickness control?<\/summary>\n

A5. Most reputable manufacturers maintain a video library on their corporate site with annotated footage showing live wall-thickness measurement during production. You can also request a live video demo where the supplier runs your specific bottle drawing and captures wall measurements in real time for your validation review.<\/p>\n<\/details>\n

\nQ6. Which injection stretch blow molding machine manufacturers provide documented wall-thickness data for INVIMA pharma submissions?<\/summary>\n

A6. Serious manufacturers supply a statistical process control bundle covering measured wall thickness at 24+ points across 200 production samples, cycle-to-cycle shot weight repeatability, and mould temperature logs. This data accelerates INVIMA sanitary registration for oral-dose and syrup bottles targeting Colombian hospital and retail pharmacy markets.<\/p>\n<\/details>\n

\nQ7. What are the most common root causes of wall-thickness variation above \u00b15% on a new ISBM machine?<\/summary>\n

A7. The top four causes are insufficient preform temperature conditioning, mould cooling circuit imbalance creating hot spots on the cavity surface, stretch-rod position drift from a hydraulic drive, and resin moisture above spec causing hydrolytic chain scission. Each of these is addressable during commissioning with the right engineering attention.<\/p>\n<\/details>\n

\nQ8. How does resin choice affect achievable wall-thickness tolerance on a given ISBM machine platform?<\/summary>\n

A8. PET is most forgiving and routinely achieves \u00b13\u20134% on a good servo platform. PETG and Tritan land at \u00b14\u20135%. PP and PPSU trend toward \u00b15\u20136% because their narrower processing windows amplify any parameter drift. PC and PCTG perform between PET and PP depending on grade selection.<\/p>\n<\/details>\n

\nQ9. How long does a wall-thickness commissioning optimization typically take on a new injection stretch blow moulding machine?<\/summary>\n

A9. Plan 5\u201310 working days of dedicated on-site engineering to optimize preform temperature conditioning, stretch-rod motion profile, pre-blow timing, high-pressure blow sequencing, and mould cooling balance. A reputable supplier bundles this engineering time into the commissioning package rather than charging separately.<\/p>\n<\/details>\n

\nQ10. What ongoing maintenance keeps wall-thickness performance inside \u00b15% across a multi-year production cycle?<\/summary>\n

A10. Quarterly stretch-rod calibration, annual mould cooling circuit flush, monthly resin dryer verification, six-month mould cavity polish inspection, and biannual PLC firmware update. A disciplined preventive schedule keeps wall variation inside spec across the full 12\u201318 year service life of an ISBM machine.<\/p>\n<\/details>\n<\/div>\n

\u0938\u0902\u092a\u093e\u0926\u0915: \u092a\u0940\u090f\u0915\u094d\u0938\u0935\u093e\u0908<\/p>","protected":false},"excerpt":{"rendered":"

How Wall Thickness Uniformity Is Controlled in ISBM Machines \u2014 and Why \u00b15% Matters For any Colombian producer evaluating a new injection stretch blow moulding machine, wall thickness uniformity is the single specification that most strongly predicts whether the finished bottle will survive retail \u2014 or come back as a warranty complaint. A 500 ml […]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[22],"tags":[],"class_list":["post-402","post","type-post","status-publish","format-standard","hentry","category-isbm-machine"],"_links":{"self":[{"href":"https:\/\/onestepblowmachine.com\/hi\/wp-json\/wp\/v2\/posts\/402","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/onestepblowmachine.com\/hi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/onestepblowmachine.com\/hi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/onestepblowmachine.com\/hi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/onestepblowmachine.com\/hi\/wp-json\/wp\/v2\/comments?post=402"}],"version-history":[{"count":2,"href":"https:\/\/onestepblowmachine.com\/hi\/wp-json\/wp\/v2\/posts\/402\/revisions"}],"predecessor-version":[{"id":404,"href":"https:\/\/onestepblowmachine.com\/hi\/wp-json\/wp\/v2\/posts\/402\/revisions\/404"}],"wp:attachment":[{"href":"https:\/\/onestepblowmachine.com\/hi\/wp-json\/wp\/v2\/media?parent=402"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/onestepblowmachine.com\/hi\/wp-json\/wp\/v2\/categories?post=402"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/onestepblowmachine.com\/hi\/wp-json\/wp\/v2\/tags?post=402"}],"curies":[{"name":"\u0921\u092c\u094d\u0932\u094d\u092f\u0942\u092a\u0940","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}