Press Safety, Chemicals, and Lockout/Tagout
Objective. Students will identify all hazardous materials in a typical pressroom, locate and read an SDS, don correct PPE for each task, and perform a lockout/tagout procedure on a designated energy source before any hands-on press work begins.
This lesson, its worked examples and its practice questions has not yet been verified by an industry-certified professional or by a certification or approval body. It is a study draft and may contain errors. Do not use it as instructions for work on a job site or on live equipment. Always follow your instructor, your supervising professional, and current official references and regulations.
VoTechWorks program approval and accreditation are still in progress. Credentials are issued only by the certifying bodies named in each program, after their own exams.
Why Pressroom Safety Comes First
Before you ever touch a press, you must understand the hazards around you. A commercial pressroom contains rotating machinery, high-voltage electrical systems, flammable solvents, UV-cure chemicals, and noise levels that can permanently damage hearing. OSHA data consistently show that chemical exposure and caught-in/between machinery injuries are leading causes of harm in printing operations. Your goal as a press operator is to go home healthy every day — and that starts with knowing the hazards, reading the Safety Data Sheets, wearing the right PPE, and locking out energy before you service any equipment.
Hazardous Materials in a Typical Pressroom
Every substance in the pressroom that could harm you is classified as a hazardous material if it meets OSHA's Hazard Communication Standard (HazCom, 29 CFR 1910.1200). The four chemical groups you will encounter most often are:
- Offset ink – contains pigments, mineral oils, and additives. Some pigments are irritants; certain petroleum-based vehicles are combustible at elevated temperatures.
- Fountain solution concentrate – typically isopropyl alcohol (IPA) or a substitute, plus pH buffers and biocides. IPA is flammable and a central nervous system depressant at high vapor concentrations.
- Blanket wash / roller wash – hydrocarbon solvents used to clean rubber blankets and ink rollers. These solvents are often flammable and can degrease skin with repeated contact.
- UV-cure cleaner – specialized solvents for UV ink systems. UV inks and their cleaners may cause skin sensitization; some components are classified as potential allergens with repeated skin contact.
Knowing the hazard category — flammability, health hazard, reactivity — is the first step. The Safety Data Sheet tells you the rest.
Reading a Safety Data Sheet (SDS)
Under HazCom 2012 (aligned with the Globally Harmonized System, GHS), every SDS follows a standard 16-section format. The sections most critical to your daily work are:
| Section | What You Need |
|---|---|
| 1 – Identification | Product name, supplier, emergency phone |
| 2 – Hazard(s) Identification | Signal word (DANGER / WARNING), pictograms, hazard statements |
| 4 – First-Aid Measures | What to do if skin/eye contact or inhalation occurs |
| 7 – Handling and Storage | Safe use and storage temperature limits |
| 8 – Exposure Controls / PPE | Required gloves, eyewear, respirator type |
| 13 – Disposal Considerations | How to dispose of waste legally |
Always locate the SDS before you open a container. SDS binders must be accessible to all workers during every shift — this is a legal requirement, not a suggestion.
Personal Protective Equipment (PPE) Selection
PPE is your last line of defense after engineering controls (ventilation, enclosed ink systems) and administrative controls (safe work procedures). Selecting the wrong PPE is as dangerous as wearing none at all.
- Nitrile gloves – chemical-resistant; required when handling inks, washes, or fountain solution. Latex gloves are not adequate and may cause allergic reactions.
- Safety glasses – minimum eye protection for general press operation where splash risk is low.
- Chemical splash goggles – required whenever you pour concentrates, mix fountain solution, or clean with solvents. Splash goggles seal around the eye socket; safety glasses do not.
- Respirator – a NIOSH-approved half-face respirator with organic vapor cartridges is required when ventilation is inadequate and solvent vapor levels may exceed permissible limits. Dust/mist filters alone do not protect against vapor.
- Hearing protection – large-format and perfecting presses can exceed 85 dB(A). OSHA requires a hearing conservation program and hearing protection at or above this level with prolonged exposure.
Matching PPE to the task is a core skill the PIA/Printing United certification exam will test.
Lockout/Tagout: Controlling Hazardous Energy
Lockout/Tagout (LOTO) is the procedure required by OSHA's Control of Hazardous Energy standard (29 CFR 1910.147) to protect workers from the unexpected energization, startup, or release of stored energy during service or maintenance. On a press, hazardous energy sources include electrical power to motors, pneumatic pressure in air cylinders, hydraulic pressure, and gravity (a raised form roller that could drop).
The six steps of a complete LOTO sequence:
1. Notify affected employees that the equipment will be shut down.
2. Identify all energy sources (electrical disconnect, air supply valve, hydraulic shutoff).
3. Shut down the equipment using its normal stopping procedure.
4. Isolate each energy source by operating the isolating device (flip the disconnect to OFF, close the air valve).
5. Apply your personal lock and tag to each isolation point. Each worker applies their own lock — never rely on a coworker's lock.
6. Verify zero energy state — attempt a normal startup, bleed down pneumatic/hydraulic lines, and use a voltage tester to confirm zero electrical energy before touching any internal component.
When work is complete, reverse the sequence: restore guards, remove your lock, notify affected employees, and then restore energy.
Tagout alone (without a lock) is permitted only when the equipment design does not allow a lock. A tag is a warning device only — it provides less protection than a lock.
Ventilation and Chemical Storage
Your pressroom ventilation map shows where exhaust fans, make-up air units, and solvent-storage cabinets are located. Flammable solvents must be stored in approved flammable-materials cabinets, away from ignition sources. Never pour solvent waste down a drain; collect it in labeled waste containers for licensed hazardous-waste disposal.
Summary
Safe pressroom work depends on four habits you practice every shift: (1) read the SDS before using any chemical, (2) select and inspect PPE matched to the task, (3) follow LOTO completely before servicing equipment, and (4) store and dispose of chemicals correctly. These are not suggestions — they are OSHA requirements and the foundation of the PIA/Printing United professional standard.
Key terms10
Materials: SDS binders for all shop chemicals, PPE kit (assorted), lockout/tagout station with personal locks and hasp, OSHA 29 CFR 1910.147 reference handout, ventilation map of pressroom
Check: Instructor observes each student complete the full six-step lockout/tagout sequence without prompting; any deviation in sequence is an automatic retest. Written SDS quiz requires 80% correct identification of hazard categories and PPE selections.
Practice check8
Answer each question, then check it. Nothing is recorded; this is your own practice.
