TIANLYLIN Solar-Powered Welding Mask Review – Pros & Cons – TIANLYLIN Auto Darkening Welding Helmet

The TIANLYLIN Solar-Powered Welding Mask is a masterwork of protective gear, a true shield against the harsh, brilliant light of the welder’s arc. It is as if this mask were forged from the night itself, imbued with the power to tame the sun’s fury. Immediately, when the arc strikes, the lens darkens in a flash, a blink of an eye, transforming the world from a blinding inferno into a calm, workable scene. This incredible speed ensures your eyes are constantly protected, and also enables a seamless workflow. Consequently, the adjustable shade range, from 4 to 9-13, allows the user to fine-tune their view, adapting to various welding applications, whether it’s TIG, MIG, or ARC. Therefore, this mask is not merely a tool but an extension of the welder’s vision, a silent partner that stands guard against the intense ultraviolet and infrared rays, and so it is a truly invaluable piece of equipment. Furthermore, the headgear is designed for maximum comfort and also stability, making it feel less like a rigid helmet and more like a second skin.

This TIANLYLIN Solar-Powered Welding Mask is a testament to intelligent, sustainable design, a clever fusion of technology and nature. Its solar-powered functionality means it’s a tireless sentinel, always ready for the next task without the constant worry of replacing batteries. Instead, it draws its lifeblood from the very light it protects you from, a fascinating paradox. The “Bucktooth” design is more than just a stylistic choice; it’s a symbol of its fierce, unyielding defense. It suggests a tool with a bite, a powerful grip on safety. Moreover, the lightweight construction ensures that even during long hours of work, it won’t feel like a heavy burden. Likewise, the easy adjustability of the headgear means it fits a wide variety of users comfortably and securely. Consequently, this mask is a silent hero, guarding your most precious sense and allowing you to focus on the intricate, creative art of welding. Ultimately, this solar-powered mask is a reliable companion, a guardian of the craft.

In conclusion, the TIANLYLIN Solar-Powered Welding Mask is an essential tool for any serious welder, a blend of functionality, safety, and comfort. It’s a quiet shield, a vigilant protector that never falters. For instance, the automatic darkening feature is a marvel of engineering, and it provides instantaneous protection. However, the true beauty of this mask lies not just in its technology but in its promise: the freedom to create without fear. It is the bridge between a dangerous process and a safe outcome. As a result, its robust construction and intuitive design make it a standout choice for both professionals and hobbyists. In addition, its solar power capability gives it an edge in terms of convenience and also sustainability. In fact, this is more than just a welding helmet; it is an investment in your well-being and a tribute to the craft of welding itself.

FEATURES:
– Auto-darkening function
– Solar power source
– Adjustable shade range 4/9-13
– Suitable for Tig, Mig, and Arc welding
– Comfortable headgear
– Lightweight and balanced design
– Fast switching time
– Variable sensitivity and delay controls
– Durable and impact resistant
– Provides UV/IR protection

The TIANLYLIN Auto Darkening Welding Helmet is a solar-powered welding hood. It has an auto-darkening function for eye protection. The adjustable shade ranges from 4/9-13. It’s suitable for Tig, Mig, and Arc welding. The helmet is comfortable with a lightweight, balanced, and durable design. It provides UV/IR protection. It also has a fast switching time with variable sensitivity and delay controls.

PROS:
– Works great
– Auto change feature works well
– No flash lights seen
– No fire and sparks seen
– Good quality materials
– Super functional
– Meets all safety measures
– Great product
– Did what it was supposed to do
– Good helmet

CONS:
– Graphics was rough texted
– Darkness would not change
– Screen just kept flashing
– Not recommended

The TIANLYLIN Auto Darkening Welding Helmet receives mixed reviews. On one hand, some users praise its automatic darkening feature, noting it works well, effectively blocking out flashes, fire, and sparks. They describe it as being made from good quality materials and say it’s highly functional and meets all safety standards. However, other users had a negative experience, reporting that the graphics were rough, the auto-darkening feature failed to change shades, and the screen just flashed, leading them to not recommend the product. Read more…

Product Image Showcases Welding and Grinding Applications

Product Image Showcases Welding and Grinding Applications

The image shows three different close-up shots. Each shot features sparks flying from a power tool. This depicts grinding and metalworking. The words ‘INSIST,’ ‘EARNEST,’ and ‘DILIGENT’ are next to the images. These words likely highlight the quality and durability of the TIANLYLIN Adjustable Shade Welding Helmet. The images emphasize the helmet’s use in demanding work environments.


TIANLYLIN Welding Helmet with Adjustable Shade

TIANLYLIN Welding Helmet with Adjustable Shade

This image shows two views of the TIANLYLIN welding helmet. The helmet has a white and black design with red accents. It features a large viewing area and a solar battery for power. A shade control knob allows for adjusting the darkness of the lens. The helmet also has an adjustable headband for a comfortable fit.



Product features for an auto-darkening welding helmet

Product features for an auto-darkening welding helmet

This image shows the key features of an auto-darkening welding helmet. The text lists six main points. These points include a solar battery, adjustable settings, a delay setting knob, high quality material, an automatic filter, and auto-dimming. The bottom half of the image shows two different views of the helmet’s filter. One view shows the knobs and settings. The other view shows a more straightforward look at the filter.


TIANLYLIN Solar-Powered Welding Mask

TIANLYLIN Solar-Powered Welding Mask

The image shows a TIANLYLIN solar-powered welding mask. The mask is black with a stylized design of a mouth with teeth and a tongue in red and white. The mask has a clear viewing window with a warning label visible on the inside. The product also comes with an adjustable head strap, which is shown in the bottom right corner of the image.


TIANLYLIN Solar-Powered Welding Mask Parts

TIANLYLIN Solar-Powered Welding Mask Parts

This image shows the solar-powered auto-darkening lens from the TIANLYLIN welding mask. The lens has a large viewing area. It has two adjustable settings. One dial is for shade. The other dial is for delay. The lens uses a solar panel to charge. It automatically changes light settings. The product has CE EN379 and ANSI Z87.1 certifications. These are visible on the product.



About WelderReview.com

WelderReview.com reviews a wide range of welding machines and other related tools such as welding helmets, carts, clamps, gloves, kits, hoods, masks, rods, wires and other welding accessories from leading brands such as Millar, Lincoln, Hobart and others.

View all posts by WelderReview.com →

Best Tianlylin Solar Powered Welding Mask Deals

TIANLYLIN Welding Helmet Auto Darkening, Solar Powered Welding Hood with True Color 1/1/1/2 Optical Clarity, Wide Shade 4/9-13 Welder Mask for TIG MIG ARC Grind (Anime Girl)

Image of TIANLYLIN Welding Helmet Auto Darkening, Solar Powered Welding Hood with True Color 1/1/1/2 Optical Clarity, Wide Shade 4/9-13 Welder Mask for TIG MIG ARC Grind (Anime Girl)

@ Amazon.com

Shop on Amazon

Key Features

  • ✅ 【Auto Darkening】The light valve (LCLV) in this welding helmet can turn from light to dark within 1/15000 seconds of electricity arc appearing with the principle of photoelectric. The bright state is DIN4 and the dark state is DIN9-13.
  • ✅ 【Solar Powered】 It uses solar cell batteries and CR2032 replaceable lithium batteries to automatically charge and extend battery life.
  • ✅ 【Adjustable Sensitivity & Delay】 The welding helmet has a sensitivity and delay setting knob, which can be rotated to adjust the sensitivity and reaction time of the LCD screen on the left and right sides above the LCD screen according to actual needs.
  • ✅ 【Adjustable Headgear】 The adjustable headgear conforms to ergonomic design and is easy to operate. There are knobs on both sides to adjust the tightness that suits you, suitable for different people's heads. The forehead is wrapped with a sponge, which has the characteristics of sweat absorption, anti slip, and breathability, not only comfortable but also protecting the forehead.
  • ✅ 【Wide Application】The automatic darkening helmet has wider coverage than common helmet. It can be used to protect the face and neck against the damages of the electricity arc and improve the product quality and working efficiency in various occasions such as TIG, MIG, MAG, etc.. The working temperature range is 14°F-140°F.

Product Details

Brand:TIANLYLIN

DEKORPO Welding Helmet Auto Darkening: True Color Solar Powered Auto Darkening Welding Helmets Welder Mask Hood (Blue Eagle)

Image of DEKORPO Welding Helmet Auto Darkening: True Color Solar Powered Auto Darkening Welding Helmets Welder Mask Hood (Blue Eagle)

@ Amazon.com

Shop on Amazon

Key Features

  • ✅ 【AUTO-DARKENING】Auto darkening welding helmet comes with a 3.62"x1.65" clear viewing area. Welder helmet switches from light to dark in 1/25000 sec
  • ✅ 【TRUE COLOR】Welder mask with true color view and 1/2/1/2 optical class. Welding helmets suitable for MMA, MIG, TIG, and Plasma welding
  • ✅ 【MULTIPLE SETTINGS】The welding hood is equipped with built-in sensitivity and delay settings. Adjust the shade state by turning the external knob of welding hoods. Buena careta de soldar
  • ✅ 【LONG BATTERY LIFE】Our welding hood auto darkening adopts a replaceable CR2032 lithium battery and welding mask solar powered. Tips: Please adjust welders helmet to grind state and place in a dark environment when caretas para soldar not in use
  • ✅ 【UPGRADED HEADGEAR】Welding mask auto darkening weighing only 2 lbs. Casco para soldar feature upgraded headgear with adjustable bands

Product Details

Brand:DEKOPRO
Model:MZ225T
Color:Blue Eagle True Color
Dimensions:N/A X N/A X N/A in

YESWELDER Auto Darkening Welding Helmet, Blue Light Blocking, 1/1/1/1 True Color Solar Powered Welding Hood with 2 Arc Sensors, Wide Shade 3.5/9-13 Welder Mask for TIG MIG ARC and Grind

Image of YESWELDER Auto Darkening Welding Helmet, Blue Light Blocking, 1/1/1/1 True Color Solar Powered Welding Hood with 2 Arc Sensors, Wide Shade 3.5/9-13 Welder Mask for TIG MIG ARC and Grind

@ Amazon.com

Shop on Amazon

Key Features

  • ✅ Advanced Eye Protection with Blue Light Blocking Technology: This welding helmet features cutting-edge Blue Light Blocking outer lens, shielding your eyes from harmful blue light during welding, protects your eyes by filtering out most of harmful high energy blue light rays while letting through the less harmful portion of the blue light spectrum. This ensures long-lasting eye comfort and safety, making it ideal for extended welding sessions
  • ✅ Multi-Application: Wide shade range 3.5/9-13, covering most common welding processes, ideal for TIG, MIG, MMA (Stick), and GRIND. Easily accommodates magnifying lenses for close-up work
  • ✅ True Color & Clear View: This auto darkening welding helmet is equipped with standard 3.64"X1.67" viewing area, enjoys a true color view with upgraded 1/1/1/1 optical clarity, improves visibility and reduced eye strain
  • ✅ Fast Auto-darkening: 2 premium arc sensors trigger darkness in 1/30000 sec. Features adjustable sensitivity and delay controls for optimal performance in any lighting/arc condition
  • ✅ Long Service Life: Powered by solar panel technology and replaceable CR2450 lithium battery. Solar panel can transform harmful arcs into electrical energy not only for longer life, but also provides support for energy conservation and environmental protection

Product Details

Brand:YESWELDER
Model:LYGL600A
Size:3.64 x 1.67"
Color:black
Dimensions:1 X 1 X 1 inches

ARCCAPTAIN True Color Welding Helmet, 4 Arc Sensor Auto Darkening Welding Hood, Solar Powered Welding Mask, 1/1/1/1 Top Optical Clarity Welder Helmet, Wide Shade 4/9-13 for TIG MIG ARC, Dragon

Image of ARCCAPTAIN True Color Welding Helmet, 4 Arc Sensor Auto Darkening Welding Hood, Solar Powered Welding Mask, 1/1/1/1 Top Optical Clarity Welder Helmet, Wide Shade 4/9-13 for TIG MIG ARC, Dragon

@ Amazon.com

Shop on Amazon

Key Features

  • ✅ 【LARGER & CLEARER SCREEN】Viewing Size 3.86" x 1.69". Our welding helmet featuring a 1/1/1/1 optical clarity lens and advanced true color technology, provides a clearer and more realistic view for enhanced efficiency and precision. Cheater Lens / Magnifying Lens Compatible Design.
  • ✅ 【FASTER AUTO-DARKENING】Features high-end auto-darkening lenses with 4 premium arc sensors, switching from light to dark in 1/25000 sec. Easily adjust the shade and sensitivity of the lenses for different working environments, perfect for TIG/MIG/ARC welding. Dark state level: 4/9-13.
  • ✅ 【200% LONGER SERVICE LIFE】Powered by solar cells and replaceable CR2450 lithium batteries, it supports longer working times. The welding helmet is made of high-quality PA material, featuring shock, heat, and wear resistance. Compliant with ANSI Z87.1/EN379 CE/CSA Z94.3 standards.
  • ✅ 【ALL-DAY COMFORT】Made from PA material, the tensile strength is up to 120MPa, and the flexural modulus is up to 4000 MPa, ensuring better flexibility of the welding helmet. Weighs only 1 lb, and the adjustable headband is equipped with breathable padding to provide a perfect fit.
  • ✅ 【BEST EYE PROTECTION】This welding helmet has a 12-in-1 smart filter with automatic DIN 16 UV/IR protection, effectively filtering harmful light, safeguarding your eyes, and adapting to various environments.

Product Details

Brand:ARCCAPTAIN
Model:Helmet-beiyong12

VILSIN Welding Helmet Auto Darkening Large View,Welding Hood True Color Solar Powered With 2 Arc Sensor,Wide Shade 3/4-8/9-13 for Welding Mask TIG MIG ARC Welding Shield,K23-5022-LY

Image of VILSIN Welding Helmet Auto Darkening Large View,Welding Hood True Color Solar Powered With 2 Arc Sensor,Wide Shade 3/4-8/9-13 for Welding Mask TIG MIG ARC Welding Shield,K23-5022-LY

@ Amazon.com

Shop on Amazon

Key Features

  • ✅ Welding hoods Performance:Welding cap with viewing area 3.78"x 1.58" | Clear visor viewing area,Cartridge size 4.33"x3.54" | 1/1/1/2 Optical class with 2 premium sensors | Switches from light to dark in 0.06ms | Light States DIN4 , Dark States DIN 5~9/9~13 DIN9~13.
  • ✅ Adjustable Headgear:All day comfort soft, padded front headband to help eliminate pressure points, while the two top head straps evenly distribute weight.with knobs on both sides to adjust the angle and knobs on the back to adjust the tightness of the headband to fit different people's heads.
  • ✅ Welding Cap Battery Type:Replaceable CR2032 battery 1 Lithium Ion batteries required. (included) The solar cells can absorb the strong light energy caused by the electric arc, thus extending the battery life. The lithium battery is replaceable.
  • ✅ Long-Lasting and Durable Welding Helmet:Welding mask package included 1 x Welding Helmet,3 x Replacement outside welding filter lens,2 x Replacement inside clear lens welding.
  • ✅ Multipurpose casco para soldar:True color view welding shield is made of PE material, solar and replaceable lithium battery dual power sources design, eco-friendly and extending the battery life. The welding helmet can be widely used to cope with plasma cutting, abrasive cutting/grinding, DC TIG, AC TIG, MIG/MAG, MMA/stick welding, and other workplaces.

Product Details

Brand:VS
Color:Eagle

YESWELDER Auto Darkening Welding Helmet, Blue Light Blocking, 1/1/1/1 True Color Solar Powered Welding Hood with 2 Arc Sensors, Wide Shade 3.5/9-13 Welder Mask for TIG MIG ARC and Grind

Image of YESWELDER Auto Darkening Welding Helmet, Blue Light Blocking, 1/1/1/1 True Color Solar Powered Welding Hood with 2 Arc Sensors, Wide Shade 3.5/9-13 Welder Mask for TIG MIG ARC and Grind

@ Amazon.com

Shop on Amazon

Key Features

  • ✅ Advanced Eye Protection with Blue Light Blocking Technology: This welding helmet features cutting-edge Blue Light Blocking outer lens, shielding your eyes from harmful blue light during welding, protects your eyes by filtering out most of harmful high energy blue light rays while letting through the less harmful portion of the blue light spectrum. This ensures long-lasting eye comfort and safety, making it ideal for extended welding sessions
  • ✅ Multi-Application: Wide shade range 3.5/9-13, covering most common welding processes, ideal for TIG, MIG, MMA (Stick), and GRIND. Easily accommodates magnifying lenses for close-up work
  • ✅ True Color & Clear View: This auto darkening welding helmet is equipped with standard 3.64"X1.67" viewing area, enjoys a true color view with upgraded 1/1/1/1 optical clarity, improves visibility and reduced eye strain
  • ✅ Fast Auto-darkening: 2 premium arc sensors trigger darkness in 1/30000 sec. Features adjustable sensitivity and delay controls for optimal performance in any lighting/arc condition
  • ✅ Long Service Life: Powered by solar panel technology and replaceable CR2450 lithium battery. Solar panel can transform harmful arcs into electrical energy not only for longer life, but also provides support for energy conservation and environmental protection

Product Details

Brand:YESWELDER
Model:LYG-L600A-BG
Color:Black with Graffiti
Dimensions:9.6 X 7.8 X 11.8 inches

YESWELDER Auto Darkening Welding Helmet, Blue Light Blocking, 1/1/1/1 True Color Solar Powered Welding Hood with 2 Arc Sensors, Wide Shade 3.5/9-13 Welder Mask for TIG MIG ARC and Grind

Image of YESWELDER Auto Darkening Welding Helmet, Blue Light Blocking, 1/1/1/1 True Color Solar Powered Welding Hood with 2 Arc Sensors, Wide Shade 3.5/9-13 Welder Mask for TIG MIG ARC and Grind

@ Amazon.com

Shop on Amazon

Key Features

  • ✅ Advanced Eye Protection with Blue Light Blocking Technology: This welding helmet features cutting-edge Blue Light Blocking outer lens, shielding your eyes from harmful blue light during welding, protects your eyes by filtering out most of harmful high energy blue light rays while letting through the less harmful portion of the blue light spectrum. This ensures long-lasting eye comfort and safety, making it ideal for extended welding sessions
  • ✅ Multi-Application: Wide shade range 3.5/9-13, covering most common welding processes, ideal for TIG, MIG, MMA (Stick), and GRIND. Easily accommodates magnifying lenses for close-up work
  • ✅ True Color & Clear View: This auto darkening welding helmet is equipped with standard 3.64"X1.67" viewing area, enjoys a true color view with upgraded 1/1/1/1 optical clarity, improves visibility and reduced eye strain
  • ✅ Fast Auto-darkening: 2 premium arc sensors trigger darkness in 1/30000 sec. Features adjustable sensitivity and delay controls for optimal performance in any lighting/arc condition
  • ✅ Long Service Life: Powered by solar panel technology and replaceable CR2450 lithium battery. Solar panel can transform harmful arcs into electrical energy not only for longer life, but also provides support for energy conservation and environmental protection

Product Details

Brand:YESWELDER
Model:LYGL500A
Color:Black
Dimensions:9.6 X 7.8 X 11.7 inches

DEKORPO Welding Helmet Auto Darkening: True Color Solar Powered Auto Darkening Welding Helmets Welder Mask Hood (Skull Design)

Image of DEKORPO Welding Helmet Auto Darkening: True Color Solar Powered Auto Darkening Welding Helmets Welder Mask Hood (Skull Design)

@ Amazon.com

Shop on Amazon

Key Features

  • ✅ 【AUTO-DARKENING】Auto darkening welding helmet comes with a 3.62"x1.65" clear viewing area. Welder helmet switches from light to dark in 1/25000 sec
  • ✅ 【TRUE COLOR】Welder mask with true color view and 1/2/1/2 optical class. Welding helmets suitable for MMA, MIG, TIG, and Plasma welding
  • ✅ 【MULTIPLE SETTINGS】The welding hood is equipped with built-in sensitivity and delay settings. Adjust the shade state by turning the external knob of welding hoods. Buena careta de soldar
  • ✅ 【LONG BATTERY LIFE】Our welding hood auto darkening adopts a replaceable CR2032 lithium battery and welding mask solar powered. Tips: Please adjust welders helmet to grind state and place in a dark environment when caretas para soldar not in use
  • ✅ 【UPGRADED HEADGEAR】Welding mask auto darkening weighing only 2 lbs. Casco para soldar feature upgraded headgear with adjustable bands

Product Details

Brand:DEKOPRO
Model:MZ801T
Color:Skull Design True Color
Dimensions:N/A X N/A X N/A in

TOOLIOM Large Viewing 3.94"x3.66" Welding Helmet True Color Auto Darkening Welding Mask Solar Powered Shade 3.5/5-9/9-13 Welder Helmet for TIG MIG Stick Cut Grind

Image of TOOLIOM Large Viewing 3.94"x3.66" Welding Helmet True Color Auto Darkening Welding Mask Solar Powered Shade 3.5/5-9/9-13 Welder Helmet for TIG MIG Stick Cut Grind

@ Amazon.com

Shop on Amazon

Key Features

  • ✅ Expansive View: Features a large 3.94" x 3.66" (14.4 square inch) viewing area with four arc sensors for enhanced MIG or TIG welding efficiency.
  • ✅ Advanced Optics: Boasts 1/1/1/1 optical class with true color technology, offering 5-9/9-13 shade in dark state and DIN3.5 in light state.
  • ✅ Rapid Darkening: The auto-darkening filter switches from light to dark in an ultra-fast 0.00003 seconds (1/30000 sec).
  • ✅ Versatile Modes: Equipped with sensitivity, delay, and shade adjustments, supporting Weld, Cut, and Grind modes for various tasks.
  • ✅ Dual Power: Powered by both a replaceable lithium battery and solar energy for continuous operation.

Product Details

Brand:TOOLIOM
Model:TL-31800H
Size:Large
Color:Black
Dimensions:N/A X N/A X N/A in

TRQWH Welding Helmet Auto Darkening Large Viewing True Color Solar Powered Welding Mask with 4 Arc Sensor Adjustable Wide Shade Range 4~5-8/9-13 Welder Mask

Image of TRQWH Welding Helmet Auto Darkening Large Viewing True Color Solar Powered Welding Mask with 4 Arc Sensor Adjustable Wide Shade Range 4~5-8/9-13 Welder Mask

@ Amazon.com

Shop on Amazon

Key Features

  • ✅ 【TRUE COLOR&LARGER VIEW】 The TRQWH welding helmet features a top-of-the-line 1/1/1/1 optical clarity lens with advanced true color technology and a large 3.94" x 3.15" view screen that provides a wide field of view, allowing welders to see clearly at different angles and increasing productivity. This welding hood improves visibility by reducing the traditional lime green color in the helmet's view screen, allowing a true view of the weld and work area while reducing eye strain.
  • ✅ 【Long-lasting and durable welding helmet】This auto darkening welding helmet is made of high-quality PP material, which is impact-resistant, flame-resistant and tough. The welder helmet complies with ANSI Z87.1/ EN379 CE/ CSA Z94.3 standards. This true color welding helmet uses solar cells and CR2450 replaceable lithium batteries. The solar cells can absorb the strong light energy caused by the electric arc, thus extending the battery life. The lithium battery is replaceable.
  • ✅ 【Zero injury welding helmet】Welding helmet has a delay and sensitivity setting knob, you can adjust the most suitable settings for your work according to different work scenarios. DIN4 in the light state, DIN5-9/9-13 in the dark state. The most powerful is the TRQWH welding helmet has 4 arc sensors that can switch from light to dark in 1/30,000 seconds. The auto-darkening filter is made of high-quality liquid crystal and optical coating, which can resist 99% of the harmful light to the eyes.
  • ✅ 【Adjustable welding mask】 TRQWH welding helmet is ergonomically designed to provide ample internal space and easy to operate, with knobs on both sides to adjust the angle and knobs on the back to adjust the tightness of the headband to fit different people's heads. True color helmet is well-made, ultra-light weight, thickened sponge on the forehead and ear area, absorbing sweat, anti-slip, breathable, protecting forehead and ears from harm, comfortable even for long hours of work.
  • ✅ 【Multipurpose welding helmet】This welding helmet is an excellent personal protective equipment for industrial protection. It can be used in a wide range of applications and can easily cope with plasma cutting, abrasive cutting/grinding, DC TIG, AC TIG, MIG/MAG, MMA/stick welding, and other workplaces. It is popular in the metal fabrication industry, welding schools, welding shops, automotive manufacturing and repair industries, marine plants, and DIY hobbyist projects.

Product Details

Brand:TRQWH
Model:TRQWH-LS01
Color:Trq-8000ff-lb
Dimensions:22 X 20 X 17 Inches
Please share this:

Facebook         Twitter         Linkedin         Pinterest        

Leave a Reply

Your email address will not be published. Required fields are marked *