How to use a welding mask safely
Updated: October 2026
You have fitted a new auto-darkening helmet and are about to strike its first arc. Learn how to use a welding mask in this order: confirm weld mode, choose a dark starting shade, set delay and sensitivity, then stop immediately if the filter stays pale. Controls differ between models, so use the manual in your box rather than copying another helmet’s knob positions. The [welding mask comparison](/hub/soldering-and-welding/welding-mask) shows which functions each listing states. This guide explains the common method without pretending every DEKO, HITBOX or YESWELDER has controls in the same place. We did not lab-test these masks. A qualifying purchase can earn a commission at no extra cost to you.
You have fitted a new auto-darkening helmet and are about to strike its first arc.
You have fitted a new auto-darkening helmet and are about to strike its first arc. Learn how to use a welding mask in this order: confirm weld mode, choose a dark starting shade, set delay and sensitivity, then stop immediately if the filter stays pale. Controls differ between models, so use the manual in your box rather than copying another helmet’s knob positions. The welding mask comparison shows which functions each listing states. This guide explains the common method without pretending every DEKO, HITBOX or YESWELDER has controls in the same place. We did not lab-test these masks. A qualifying purchase can earn a commission at no extra cost to you.
Our top picks
| Badge | Product | Stated shade | Grind mode | Power note | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  YESWELDER YESWELDER LYG-L600A | 4 / 9–13 | Named, with grind use | Solar plus CR2450 | 9.1 | about £37.04 | View offer |
| Alternative |  TOOLIOM TOOLIOM TL-31800H | 4 / 5–9 / 9–13 | Weld, cut and grind | Solar, lithium; check type-C | 8.9 | about £54.14 | View offer |
| Best value |  HITBOX HITBOX HT111 | 4 / 5–9 / 9–13 | Not stated | Solar, lithium cell | 8.7 | about £24.99 | View offer |
On this page
Light state, dark state and grind
An auto-darkening filter has a light state for positioning and a dark state for the arc. Many listings use shade 4 as the light state and shades 9–13 for welding. The light state is not clear safety glass. It is pale enough to see the joint before the sensors trigger the darker filter. Once the arc starts, the change should be immediate to the wearer.
Grind mode deliberately stops the filter reacting as it would in weld mode, so you can see more clearly while grinding. That makes it unsuitable for welding. A Parweld manual warns users to turn the control back after grinding, and an R-Tech buyer reported receiving helmets already set to grind. Look at the mode before the first arc, even if the mask is new. A light-state number does not prove grind mode. HITBOX HB-001 states a shade 4 light state and does not clearly name grind in the listing used here. TOOLIOM explicitly names weld, cut and grind. If grinding is part of your work, check the manual and use eye protection with the appropriate impact rating.
Shade, then delay, then sensitivity
Start with the shade recommended for your process and current, choosing the darker end when uncertain. A UK supplier chart places MMA at 80–175 A around shade 10, MIG steel at 100–175 A around shade 11 and TIG at 20–40 A around shade 9. Those figures are starting guidance, not a substitute for your employer’s risk assessment or the helmet manual. Change the shade only until you can see the pool without uncomfortable brightness.
Delay controls how long the filter remains dark after the arc stops. A short delay can suit brief tacks. A longer delay helps when the hot pool remains bright or a momentary obstruction would otherwise let the filter open. The Parweld XR935H example spans roughly 0.1 to 1.0 seconds, while the YESWELDER listing in this set states 0.1 to 0.8 seconds. Your mask may use different markings. Sensitivity controls how readily the sensors respond. Use higher sensitivity for a small arc or TIG, and reduce it if nearby welding or strong light triggers the filter when you are not working. Do not use low sensitivity to compensate for an unsuitable shade. Feature choice before buying is on the welding mask buying guide.
If the filter stays light or flashes
Stop the arc as soon as the lens stays pale, flickers or opens unexpectedly. Do not continue for another bead to see whether it improves. First confirm that the selector is in weld mode rather than grind, then check the power indicator or battery according to the manual. A solar-assisted filter may still rely on a coin cell. DEKO names a replaceable CR2032, while LESOLEIL describes a non-removable cell.
Clean the outer cover and sensor openings with the method specified by the manufacturer. Spatter, dust or a hand over the sensors can reduce their view of the arc. Face the sensors towards the work and raise sensitivity if the arc is small. For TIG, use a longer delay and follow the welding mask for TIG steps. A DEKO reviewer fitted a fresh battery and the unit still did not dim. That is a faulty helmet to return, not an invitation to keep testing against a live arc. A cracked shell, damaged cover, loose filter or visible gap around the lens also takes the helmet out of service. Tape is not a repair for a light gap.
Before you strike an arc
Make the pre-arc check a fixed routine. Inspect the shell, filter, cover lenses and headgear, and stop if anything is cracked, loose or missing. Confirm weld mode, then select a suitably dark starting shade for the process and current. Set sensitivity for the arc and delay for the work, using the manual’s test function if one is provided. Check battery status, clean the sensors and ensure they face the joint without being blocked. Fit the helmet so it stays down and covers your face and neck as designed. Put on the remaining PPE and confirm fume extraction and screens for people nearby.
For MMA, place a live electrode holder on an insulated rest, not on the helmet. When you chip slag or wire-brush, wear suitable goggles or safety glasses. Lifting the welding mask does not leave your eyes protected from fragments. Why goggles have that supporting job, and are not a substitute during arc welding, is on the goggles page linked below. A welding mask filters hazardous light only when it is intact, correctly set and covering you. It does not remove welding fume, protect uncovered skin or screen a bystander.
When to stop and seek help
Repeated flashes are not a normal part of learning. If the filter will not darken after the mode, battery, sensors, sensitivity and cover have been checked, stop using it and contact the seller or manufacturer. If you have been exposed, arc-eye pain may begin several hours later rather than immediately. Worsening pain, a change in vision or concern after exposure needs urgent clinical advice, not another helmet adjustment.
The same stop rule applies when the headgear will not hold the shell in position. A mask that falls, lifts or shifts away from the face is not fixed by choosing a darker shade. Replace damaged parts only with compatible components identified by the manufacturer.
Common questions
What should I set first?
Confirm weld mode first, then select a dark enough shade. Set delay and sensitivity after that. A perfect sensitivity setting cannot make grind mode safe for an arc or correct a shade that is unsuitable for the process.
What does delay do?
Delay keeps the filter dark briefly after the arc ends. A longer setting can cover a glowing pool and momentary interruptions. A shorter one can feel quicker between tacks. Use the range and advice in your own manual.
How do I know the mask is in grind mode?
Check the selector, indicator and manual. Control layouts vary, and some listings merely mention a light state without confirming grind mode. Never test the distinction by looking at an unprotected arc.
Can I replace every helmet battery?
No. DEKO lists a replaceable CR2032 and YESWELDER a CR2450, while LESOLEIL says its cell is not removable. Solar assistance does not by itself tell you whether the battery can be changed.
Why does the filter work on MIG but flash on TIG?
Low-current TIG can produce a smoother, weaker light signal than MIG. Increase sensitivity, lengthen delay and clean the sensors. If it still opens on a stable arc, the helmet may not suit that current.
Can I chip slag with the helmet raised?
Only with suitable impact eye protection underneath. HSE guidance identifies goggles for chipping and wire-brushing. A welding filter and an impact-rated goggle perform different jobs.
When is the mask faulty rather than wrongly set?
Treat it as faulty if it remains light after correct mode, power and sensor checks, repeatedly flashes on a suitable arc, has a cracked shell or shows a gap around the filter. Stop using it and arrange a return or repair.
Related pages
Sources
Public UK sources and the amazon.co.uk listings in this set, last checked on 17 October 2026.
- HSE, welding health and safety controls (retrieved 17 October 2026)
- HSE, welding and flamecutting in mechanical repair (retrieved 17 October 2026)
- GOV.UK, PPE Regulation 2016/425 in Great Britain (retrieved 17 October 2026)
- BSI, BS EN ISO 16321-2:2021 (retrieved 17 October 2026)
- BSI, protective eyewear standards brochure 2025 (retrieved 17 October 2026)
- Royal United Hospitals Bath, arc eye leaflet (retrieved 17 October 2026)
- College of Optometrists, photokeratitis (retrieved 17 October 2026)
- Express Weldcare, recommended lens shade guide (BS EN 169) (retrieved 17 October 2026)