Chemical working environment in varnishing and gluing

Safety in the wood workshop is not just about rotating blades. Much of the risk is invisible: chemicals in adhesive and varnish and fine wood dust that does not hurt immediately but can damage your health over time. That is why there are specific rules for how you must handle them.

§Safety data sheets and workplace instruction

The supplier of a chemical product — glue, varnish, stain, cleaner — must provide a safety data sheet that describes the product's hazards, handling, storage and first aid. The employer must make the data sheet available to you and must also prepare a workplace instruction manual that translates the data sheet information into concrete instructions for your specific workplace. A central principle is substitution: if a less hazardous product exists that can solve the same task, it should be chosen instead.

§Epoxy and isocyanates

Epoxy and isocyanate-containing products — used in certain adhesives and lacquers — are subject to particularly strict rules because they can cause serious hypersensitivity reactions in the skin and airways. Spraying with these products is generally prohibited unless it takes place in a closed system such as a spray cabin or box with effective exhaust. During the actual spraying work air-supplied respiratory protection must be used and employees working with epoxy and isocyanates must have completed special mandatory training. For isocyanates the training must also be renewed at least every fifth year — a requirement that came into effect in 2023.

§Wood dust

The Danish limit value for inhalable wood dust is 1 mg/m³ measured as an average over an 8-hour working day — a value that was significantly tightened in 2008, thereby more than halved compared to previously. By comparison, the EU's binding limit value for occupational exposure to wood dust is 2 mg/m³ as a time-weighted average. In Denmark, all wood dust is furthermore considered cancer-causing when exposed to large amounts over a long time, which is the reason why extraction at machines and respiratory protection for dusty work is not optional — it is a requirement for working legally and responsibly.

§Handling of skin and eyes

• 01Use gloves of the type recommended in the safety data sheet for the specific product
• 02Avoid skin contact with glue lacquer and solvents—several of them are absorbed through the skin.
• 03Use eye protection where there is a risk of splashing and know the location of the eyewash station
• 04Change work clothes soiled with chemicals, so you don't carry it further

§Storage

Flammable liquids such as paint, thinner and certain adhesives must be stored separately from other substances and in a room or cabinet with good ventilation so vapours do not accumulate. Cloths that have been used with oil or oil-containing products can self-ignite and must either be spread out to dry or placed in a closed, non-flammable container — never crumpled in an ordinary waste bin.

“What you can't see or smell right away is often what requires the most respect — chemistry and dust work over time not just in the moment.”