Food-Safe Woods, Finishes
and Glues

Most of the templates we sell end up as something that touches food: butter and jam spreaders, cheese knives, serving and charcuterie boards. The files give you the shape. The wood, the glue and the finish are your call, and they decide whether the thing is pleasant and safe to eat from. This is what we've found, with links so you can check it yourself.

Choosing the Wood

Tight-grained, closed-pore hardwoods are the usual choice for food: hard maple, cherry, black walnut, beech and birch. They're hard enough to hold an edge, they don't splinter, and they don't have big open pores to trap food. Fine Woodworking cautions against soft and very porous woods for food contact because they can harbor bacteria, and Woodcraft says the choice of wood is almost as important as the finish.

Red oak is the classic argument. Its open pores run end to end, and plenty of woodworkers avoid it for boards for that reason, while others use it happily. We couldn't find a study that settles it, so we stick with maple, cherry and walnut for anything that touches food.

Woods That Cause Reactions

The Wood Database is blunt: very few woods are actually toxic, but many can cause allergic reactions, and a reaction can build with repeated exposure. Most of the trouble comes from dust while you're cutting and sanding, not from eating off a finished piece. A food-safe finish reduces the risk but doesn't remove it. Its chart lists effects including:

• Cocobolo, the rosewoods and African blackwood: irritants and sensitizers.
• Padauk and purpleheart: irritants and sensitizers; nausea is listed for both.
• Wenge: irritant and sensitizer; its splinters are known to go septic.
• Ebony: irritant and sensitizer.
• Yew: listed as a direct toxin. Don't use it for anything that touches food.

Even the everyday woods appear on the list: maple, walnut, beech, birch and oak are all noted as irritants or sensitizers for some people. Wear a dust mask or respirator while you sand, whatever you're making. The Wood Database also says its list isn't complete, so a wood that isn't on it isn't proven safe.

Walnut and Tree Nut Allergies

An allergist answering for Food Allergy Canada says tree nut reactions come from the protein in the nut, so items made from walnut wood are likely extremely low risk. Less-refined nut oils used as finishes could be a problem. There are no direct studies, so the practical answer is to say what wood and finish you used, and let anyone with an allergy check with their doctor.

Plywood, MDF and Laser Char

We found no food-contact information on the glues and binders in plywood and MDF, so we keep them off surfaces that touch food. A solid-wood spreader cut on a laser is fine, but sand the charred edges back to clean wood. A finish won't stick properly to char (it flakes off with it), and it tastes and looks like soot. We didn't find a study on the safety of char itself.

Choosing a Finish

Here's the rule that clears up most of the confusion. Finishing writer Bob Flexner puts it this way: all finishes are food safe once they have cured, and no finish is food safe until it has fully cured. The rule of thumb is about 30 days at room temperature (65 to 75 °F). Dry to the touch in a day or two is not the same thing. Fine Woodworking gives the same 30-day guideline.

For the spreaders and cheese knives we design, our default is mineral oil or a board butter: nothing to wait for, easy to renew, and nothing to chip. For a board you'll only serve on, a cured oil finish or even a film finish is fine.

Glue for Layered Pieces

Our spreaders are glued up from layers, so the glue matters too. Titebond III's technical data sheet lists it as FDA approved for indirect food contact (cutting boards are the example given) and NSF/ANSI 51 certified; Titebond II carries the same rating. That rating assumes thin glue lines, not a coating of glue, so clamp well and wipe off the squeeze-out before it skins. We couldn't find a food-contact rating for CA (super) glue, so we keep it out of food-contact areas.

Care and Cleaning

Wood is a good food surface. In Dean Cliver's tests at UC Davis, bacteria on wooden boards didn't multiply and gradually died, while knife-scarred plastic was very hard to clean by hand. He pointed to an earlier study where people who used wooden boards had a lower rate of salmonella than people who used plastic or glass. That's an association, not proof, but it's reassuring.

• Wash by hand with hot, soapy water right after use, rinse and dry it straight away.
• Don't soak it and don't put it in the dishwasher.
• Oil it again when it looks dry or pale. The University of Kentucky suggests monthly, more with heavy use.
• Rounded edges and smooth inside corners are easier to keep clean than sharp grooves.

The full routine, including oiling and getting out stains and smells, is in our wood care guide.

If You Sell What You Make

When you make something from one of our templates, you choose the materials, so you're responsible for them and for how the piece is labelled and sold. Follow each product's data sheet, let finishes cure fully, and say what wood, glue and finish you used. Anyone with allergies should check with their doctor.

Looking for something to make? Our Etsy shop has spreader and board templates for laser, CNC or bandsaw.