Week 6 Prep: The kitchen: tools and surfaces

Chopping boards, choppers, strainers and containers, and their maintenance — including an honest look at what board material actually does to hygiene, knife wear and particle shedding.

29 March 2027

The inventory#

A kitchen’s non-heat tools fall into a small number of categories, each with a job distinct from the others: a cutting board to work on, a chopper (knife or cleaver) to cut with, strainers to separate solid from liquid, and containers to hold and store what has already been prepared. None of this week’s content is about technique with any of these tools — the knife itself is week 7’s subject — only about the tools and surfaces as objects that need choosing and maintaining.

Board material, compared honestly#

Wood, plastic and marble each trade off differently across hygiene, knife wear and particle shedding, and none of the three wins outright.

Wood is kind to knife edges — the surface yields slightly rather than blunting the blade — and, counter to a common assumption, a well-maintained wood board is not automatically less hygienic than plastic: wood’s natural porosity can draw liquid (and the bacteria in it) below the surface, away from a cloth or a subsequent cut, though this benefit depends entirely on the board being dried properly and not left wet. It requires more upkeep than the other two materials: periodic oiling to prevent cracking, and it cannot go in a dishwasher.

Plastic is dishwasher-safe, cheap to replace, and takes knife scarring readily — visible cut marks accumulate and, once deep enough, are harder to clean thoroughly than a smooth surface, which is the usual argument for replacing a heavily scored plastic board rather than continuing to use it. It is gentle on edges, similar to wood.

Marble and other hard stone boards are the hardest of the three, which means they are the least forgiving to a knife edge — they dull a blade faster than wood or plastic — and they shed comparatively little material of their own to whatever is cut on them, but they are heavy, can chip, and are mostly chosen for pastry work (where a cold, non-porous surface helps) rather than as a general-purpose board.

What cutting actually does to the board — and the food#

Every board sheds some material into whatever is chopped on it, an effect usually invisible and, until recently, not well quantified for plastic. Yadav et al. (2023), in Environmental Science & Technology, measured microplastic release from polyethylene and polypropylene cutting boards during normal chopping and found that a substantial number of microplastic particles could be generated and transferred to food this way — the American Chemical Society’s summary of the study frames it as cutting boards being an overlooked source of microplastic exposure through food, not through packaging or water as more commonly discussed.

Reporting this finding honestly means reporting its limits along with its headline. The same study tested the effect of the released microplastic particles on cultured mouse fibroblast cells over 72 hours and found no significant effect on cell viability at the concentrations tested. The authors characterised this as an open question rather than a closed one, and called for further research into the health effects of dietary microplastic exposure. The correct summary is therefore that plastic boards measurably shed microplastic into food during use, and that this study did not find evidence of short-term cell toxicity at the levels it tested — both halves of that sentence are part of the finding, and dropping either one misrepresents it.

Why there is no tutorial#

This week has no calculator exercise: the decisions in front of a student are which board material to choose and how to maintain it, both of which are judged by comparison and inspection, not by a number a calculator could return. The tutorials resume next week, where a knife’s own figures — edge angle, hardness, weight — are checked against a reference at the bench.

Maintenance#

Strainers and containers are maintained by the same basic rule as boards: wash promptly after use, dry fully before storing, and replace anything whose surface has degraded to the point of trapping food or liquid — a cracked container lid, a strainer mesh that has started to distort. For a wood board specifically: wash with hot soapy water rather than soaking, dry standing on edge so air reaches both faces, and oil periodically with a food-safe mineral or specialist board oil to keep the wood from drying out and cracking, which is the main failure mode wood is prone to that plastic and stone are not.