Protective Gear

Part of Acids and Alkalis

Improvised and craftable protective equipment for handling acids and alkalis safely when industrial PPE is unavailable.

Why This Matters

Acids and alkalis cause some of the worst injuries a chemist can suffer. Unlike cuts or burns from heat, chemical burns are often painless at first — the damage is done before you realize it. Strong lye begins destroying skin tissue immediately on contact; concentrated acid can cause permanent blindness with a single splash to the eyes. In a rebuilding community without hospitals or specialized medical care, a serious chemical injury could be permanently debilitating or fatal.

The good news is that effective protective gear does not require industrial manufacturing. Many traditional societies worked with lye, acids, and caustic chemicals for centuries using nothing more than leather, wool, and woven fabric. Understanding the principles behind protection — barrier materials, rinsing protocols, and safe working posture — allows you to protect yourself using available materials.

The guiding principle is layers: multiple imperfect barriers are better than relying on any single material. Leather gloves over wool underlayers, a wax-treated canvas apron over a long-sleeved shirt, a wide-brimmed hat and face shield over goggles — each layer adds time between a spill and your skin.

Eye Protection

Eyes are the most vulnerable target. Even a small splash of strong acid or lye can cause permanent blindness in seconds. Eye protection is non-negotiable.

Improvised Goggles

Wood and leather goggles:

1. Cut two eye-sized viewing holes in a strip of stiff leather or thin wood.
2. Cover each hole with a piece of clear animal membrane (dried fish air bladder, thin scraped rawhide) or, if available, salvaged window glass shaped to fit.
3. Seal the membrane to the leather with pine pitch or rendered tallow.
4. Attach a leather or cloth strap to hold the goggles against the face.
5. Ensure the goggles sit flush against the face — gaps allow splash entry.

Cloth wrap: In the absence of any rigid material, a tightly woven cloth wrapped around the face leaving only narrow slits to see through provides minimal protection against splashes. This is a last resort only — it does not protect against mist or vapor.

Face Shield

A face shield protects the entire face, not just the eyes. It is especially valuable when pouring corrosives or working with large volumes.

Construction:

1. Cut a piece of stiff material (hardened leather, thin wood, heavy bark) to cover from forehead to chin.
2. Cut a horizontal slot or fit a clear membrane panel at eye level.
3. Attach a head strap or mount to a hat brim.
4. The shield should angle slightly forward so splashes deflect downward rather than into the gap at the chin.

Wax coating

Rub beeswax into leather and wood eye protection regularly. Wax repels both acid and lye solutions, making them bead and run off rather than soak in.

Hand and Arm Protection

Hands and forearms are in the splash zone for almost every chemistry task. They must be protected for any work involving concentrated acids or lye.

Leather Gloves

Thick leather (cattle hide, elk hide) offers good resistance to brief contact with dilute acids and alkalis. The leather must be treated and maintained:

• Initial treatment: Soak leather in hot rendered tallow for 30 minutes, allow to cool and harden. This fills pores and repels water.
• Regular maintenance: Re-apply tallow or lard before each chemical working session.
• Replacement: Discard gloves when they soften, develop holes, or show white patches (lye degradation) or brown pitting (acid damage).

Lye penetrates leather over time

Even tallow-treated leather is not indefinitely resistant to strong lye. If gloves become wet with lye, rinse immediately with large amounts of water before removing them. Pulling off contaminated gloves can drag the lye onto your wrists and arms.

Wool Underlayers

Wool beneath leather gloves adds an important safety margin. If lye or acid penetrates the leather, wool slows further penetration by absorbing and distributing the liquid before it reaches skin. Thick woolen mittens worn under leather gauntlets are a traditional approach used by soapmakers.

Extended Protection

For tasks where splashing is likely (stirring large acid vats, mixing lye solutions), extend protection to the elbows:

• Heavy leather bracers or gauntlets covering the lower arm
• Wool sleeves under a leather over-sleeve
• A long leather work apron that covers the forearms when arms are at working height

Body Protection

The Apron

A heavy apron is standard protection for any chemistry work. It protects the torso and upper legs — the area most exposed when working at a bench or vat.

Materials in order of preference:

1. Thick leather — best resistance, but heavy and expensive
2. Waxed canvas or wool — lighter, good resistance to splashes, must be re-waxed regularly
3. Dense woven wool — provides time to recognize and react to a spill before it reaches skin
4. Multiple layers of heavy linen — last resort; absorbs corrosives but buys reaction time

Design requirements:

• Long enough to cover from mid-chest to mid-shin
• Fitted at the neck to prevent V-gap where splashes funnel
• No loose trailing strings or hems that drag through spill zones
• Hang the apron so it comes off quickly in an emergency — loops and hooks, not knots

Working Clothes

Underneath your apron, wear:

• Long sleeves covering to the wrist
• Long trousers or skirts covering to the ankle
• Closed footwear with upper coverage — bare feet or open sandals are dangerous near acids and lye

Foot Protection

Spills flow downward. Feet are frequently the first thing contacted by a dropped container or overflowing vat.

Minimum standard: Closed leather shoes with thick soles. The leather uppers slow penetration of acids and lye long enough to remove the shoe.

Better standard: High leather boots (ankle to mid-calf), tallow-treated. These prevent liquid from running into shoes from above and protect the ankle from splashes.

Work positioning: Stand slightly back from the bench edge. This means the primary spill zone is the floor in front of you rather than your feet.

Respiratory Protection

Most dilute acids and lye solutions do not produce significant fumes at room temperature. However, certain processes do produce hazardous vapors:

• Heating concentrated acid — sulfuric acid vapors, acetic acid vapors
• Mixing bleaching powder with acid — chlorine gas
• Ammonia production — ammonia vapors
• Nitric acid work — nitrogen dioxide (brown fumes)

For these situations, work outdoors or in well-ventilated spaces where moving air carries fumes away from you. Stand upwind. If you must work indoors, position a bellows or fan to push air away from your face.

Improvised respirator: A cloth mask dampened with dilute baking soda solution provides minimal protection against acid vapors (the baking soda neutralizes some acid). A cloth mask dampened with dilute vinegar provides minimal protection against alkaline ammonia vapors. These are emergency measures only — they are not effective against concentrated fumes.

The Buddy System

Never work with concentrated acids or lye alone. A second person can:

• Raise the alarm if you are incapacitated by a splash
• Immediately pour emergency rinse water over you (have a large bucket always at hand)
• Remove contaminated clothing if your hands are affected
• Summon additional help

The first 30 seconds after a serious chemical splash determine how severe the injury will be. Immediate, large-volume water rinsing is the only intervention that matters — and you may not be able to perform it yourself if both hands are affected.

Emergency Rinse Setup

Before beginning any chemical work, set up your rinse station:

1. Large bucket (at least 20 liters) of clean water within arm’s reach
2. A second bucket for rinsing eyes specifically — fill with clean water, position at bench height so you can lean forward and splash your face
3. A third bucket in case the first two are not enough

Protocol after any splash:

1. Immediately flood the affected area with water — do not wipe, just pour
2. Continue rinsing for at least 15 minutes for strong acids or lye
3. Remove any clothing that was contaminated (cut it off if necessary)
4. Only after thorough rinsing, assess the injury and treat as a burn

Do not neutralize chemical burns

The old advice to put vinegar on a lye burn or baking soda on an acid burn is dangerous. The neutralization reaction generates heat, causing additional tissue damage. Rinse with plain water only.