Rule Book

Quality & Rule Book

by a fellow maker, for fellow makers

These are the rules I work by — what I promise, what I accept as natural, and how I deal with the small surprises that come with wood as a material. If you've ordered from Hobbymill before, none of this will surprise you. If you're new, this tells you what to expect.

What we promise

Every piece of wood that leaves the workshop:

  • No dead knots, no black knots, no loose knots.
  • No cracks, mould, insect damage, or rot.
  • Ships flat and straight from the workshop.
  • Kiln-dried and stable.

Dimensions and tolerances

ProductThicknessWidthLength
Sheets for modelling±0.10 mm−5 / +20 mm±20 mm
Planking sheets±0.10 mm−5 / +20 mm±20 mm
Strips for planking±0.10 mm±0.10 mm±20 mm
Square strips±0.20 mm±0.20 mm±20 mm
Laserable sheets±0.20 mm±3 mm±3 mm
Knife blanks (40×30×140)±2 mm±2 mm−0 / +10 mm
Pen blanks (19×19×130)−0 / +2 mm−0 / +2 mm−1 / +5 mm
Coloured hornbeam (40×40×400)±2 mm±2 mm−5 / +10 mm
Unique blanks

Unique blanks are sold piece-by-piece, photographed and numbered — exact dimensions are shown in each listing.

Surface finish

Sheets

Sanded to 120 grit on the visible surfaces, with crisp edges. Ready for your own finish-sanding to whatever grit your project calls for.

Laserable sheets

Sanded to 120 grit, ready for CO₂ laser cutting and engraving.

Strips and square strips

Precision-sawn on a Byrnes table saw — not sanded. The sawn surface is clean and consistent, but you may see very fine saw marks on one side under close inspection. A light pass with sandpaper before paint or finish removes them.

A note on sheet geometry

Our sheets are milled to consistent thickness across the whole piece, but the two long edges may not always be perfectly parallel to each other. The variation is small, but it's there. For most modellers this doesn't matter — you'll be ripping strips or cutting parts to your own dimensions anyway. If you need perfectly parallel edges for a particular project, order Custom Milled where each piece is cut to your exact specifications.

What is natural — and accepted

Wood is a living material. The following are normal and not considered defects:

Colour variation within a species

Swiss pear ranges from soft pink-cream to a deeper rose. Castello boxwood ranges from pale cream to a warmer yellow-cream. Black hornbeam ranges from deep black to occasional brownish streaks. Alaskan yellow cedar is the most uniform but can show subtle warm tones.

Small sound pin knots in fruitwoods

Swiss pear in particular naturally develops small, tight, light-coloured pin knots — these are part of the wood's character, not defects. They are firm, do not affect structure, and many modellers consider them attractive. Dead knots, black knots, and loose knots are never shipped.

Subtle grain variation between pieces

Two sheets are never identical.

Natural ageing

All wood slowly deepens or lightens with exposure to light. Swiss pear in particular darkens beautifully over the first year.

Species-specific movement

Some woods are more sensitive to humidity than others. Alaskan yellow cedar in particular is known to move (cup or bow slightly) when it meets a new climate.

Movement in thin sheets

Sheets at 0.6–1 mm thickness are inherently sensitive to humidity changes and may show slight cupping or bowing after travelling between climates. This is easily corrected — see Handling your delivery below.

Handling your delivery

Wood that has been carefully kiln-dried in Estonia will need a short adjustment when it arrives at your workshop, especially if the climate is significantly different from ours.

Before opening

Let the sealed package rest in the room where you'll work with the wood for at least 24 hours. This step matters most for thin sheets (0.6–1 mm) and for Alaskan yellow cedar.

If thin sheets have cupped slightly in transit

Lay them flat on a smooth surface, place a flat board or two on top, and leave them overnight at room temperature.

After unpacking

Store unused wood flat, supported along its length, and away from direct sunlight or heat sources.

Why a portion is set aside

When timber arrives at the workshop, a meaningful portion gets set aside.

Not because it's bad wood. For general woodworking — furniture, turning, even most hobby projects — it would be perfectly fine. But for ship modelling, where every plank on a hull is seen, where the smallest colour shift breaks the illusion of a single piece of timber, "perfectly fine" isn't the same as right.

What we ship is the portion that's actually right for the job.

Colour matching within an order

Sheets (stock orders)

When you order multiple stock sheets, we do our best to pull pieces from the same batch, but we cannot guarantee zero colour variation across pieces — especially across different thicknesses, which are milled from different parts of the timber.

Strips (in packs of 10 or 50)

All strips within a single pack are colour-matched. No visible colour variation within the pack.

Custom Milled orders

Every piece in a custom order is cut from the same single piece of timber. Colour variation between pieces is essentially zero — they look like they belong together because they did, until they were milled. This is what serious modellers come to Hobbymill for.

We pack for the project, not the order line

Wood is a natural material, and even with the most careful inspection, a piece can have a defect that only shows once it's milled — a dark patch that runs deeper than expected, a colour shift on one edge, a tolerance error from a saw cut that didn't quite go right. We know what these materials are used for, and we know that running short of one piece can stall a build for weeks while replacement wood travels across continents.

So when it makes sense, we add a little to your order — enough that you can finish the project even if a piece doesn't work out.

This isn't a fixed policy. Sometimes the wood is uniformly perfect and we ship exactly what you ordered. Sometimes a particular batch needs an extra strip or sheet to be safe. The principle is simple: you ordered material to complete a build, not to count pieces.

If something is wrong

If a piece arrives with damage, missing pieces, defects beyond what's described here, or simply isn't right for your project — send a photo within 14 days and we'll make it right.