Scope: ironing boards (standing floor, tabletop, wall-mounted/built-in) and their covers/pads, plus sewing-room press accessories (tailor's ham, seam roll, sleeve board, clapper/pounding block, point presser, pressing mitt, pressing cloth, needle board). Excludes the iron appliance itself (no sibling leaf for it in catalog.json) and commercial/industrial steam presses or rotary irons (separate equipment class, noted below).

Seed:
1. Watchmaker-equivalent tolerance: the tailor's ham's two-fabric build (cotton on one face, wool on the other) is a setting most buyers never notice — cotton face tolerates the high heat linen/cotton need, wool face is the lower-heat side for wool and silk, built into one pillow.
2. First thing the watchmaker notices: the point presser is deliberately bare, unpadded hardwood under a thin cloth — the lack of padding is the feature (it's what gives a collar point a crisp edge), not a cut corner.

Sources:
[wikipedia_ironing] https://en.wikipedia.org/wiki/Ironing — ironing temp range 180-220°C by fabric; folding board patent history (Porter 1875, removable sleeve press board; Boone 1892 sleeve-board patent); tailor's ham defined; commercial steam press/rotary iron named as separate equipment class — fetched excerpt
[wikipedia_tailorsham] https://en.wikipedia.org/wiki/Tailor%27s_ham — ham used for darts/sleeves/cuffs/collars/waistlines; made of heavy cotton canvas; filled with sawdust or scrap fabric — fetched excerpt
[sewguide_pressingtools] https://sewguide.com/pressing-tools/ — full accessory roster and definitions: sleeve board (flattens for storage), seam roll (dowel-shaped, DIY = stuffed tube), tailor's ham (cotton one side/wool other side, by heat tolerance), clapper (smooth sanded wood, pounds creases flat with steam), point presser (pointed hardwood, often felt/cloth-covered to stop steam raising the grain), pressing mitt (heat-resistant glove for curves), needle board (canvas with upright wires, for napped/pile fabrics), pounding block (heavier clapper for stubborn multi-layer seams) — fetched excerpt
[sewguide_cover] https://sewguide.com/easy-ironing-board-cover/ — cover padding recommended ~3/8in for wool/thick fabric; cotton cover fabric must be lint-free; drawstring/cord-casing fit method; scorched yellow staining is the cover's known failure mode — fetched excerpt
[sewguide_presscloth] https://sewguide.com/pressing-cloth/ — pressing cloth materials: open-weave cotton (general use), wool (for wool), silk organza (sheer, heat-resistant, lets you see your work), muslin (thin, see-through), Teflon-coated (transparent, reusable, non-stick, for delicates); common sizes 12in square or 12x18in; prevents scorch/shine/sticking on silk, wool, nylon, lace — fetched excerpt

Branches:
- product_type -> board_format: only boards need a mount/support answer; covers and accessories don't, per sewguide_cover and sewguide_pressingtools treating those as separate listed items from the board itself.
- product_type -> accessory_type: each accessory name in sewguide_pressingtools (ham, seam roll, clapper, point presser, mitt, needle board, pressing cloth, sleeve board) carries its own distinguishing spec, confirmed by the per-tool paragraphs in that source.

Noise:
- Commercial steam press / rotary iron (wikipedia_ironing "Commercial equipment" section) — left out: industrial equipment, not a household ironing-board-leaf product.
- The iron appliance itself (soleplate, steam output, temperature dial) — left out: no sibling leaf for it in catalog.json, and it's a distinct appliance category from boards/accessories.
- Spray bottle / sprinkler and electric steamer (sewguide_pressingtools) — left out: general laundry tools, not board- or press-accessory-specific.
- Exact board length/width in inches and a named stability standard (e.g. ASTM) — could not confirm with two sources this run: astm.org and cpsc.gov both returned 403 to automated fetch, brabantia.com served a bot challenge, and archive.org returned 429 throughout (shared rate limit across parallel runs). Represented as categorical size/mount facets instead of numeric ranges, and as a low-confidence judgement rather than a cited standard.

Corrections (2026-10-26):
- Added `sleeve_board_foldability` and `pressing_mitt_fabric_rating` facets plus matching `accessory_type` branch legs, sourced to sewguide_pressingtools ("most sleeve boards can be flattened"; "mitt is made of heat-resistant fabrics"), fixing the two accessory_type values with no facets at all.
- Wired `board_surface_length_class` and `iron_rest_or_shelf` into `board_format`'s `tabletop_countertop` and `standing_floor` branches (`then_ask`), fixing their unreachability.
- Re-attempted the governing stability standard via astm.org, cpsc.gov, ansi.org webstore and archive.org; all still blocked (403/403/403/429). Judgement note updated to reflect the retry; confidence stays low, no standard name invented.
- Added `height_adjustability` facet for `ironing_board`/`standing_floor`, sourced to sewguide_pressingtools's ergonomics line ("height... should be able to be adjusted to your height").
- Softened `pressing_cloth_size_class`'s backfill_note: no second source found for the 12in/12x18in figures, so it now explicitly says sewguide_presscloth itself calls these rough reference points, not a settled convention, instead of stating them as fixed thresholds.
- Dropped the unsupported "~1/3 of standing length" fraction from `board_format`'s backfill_note (wikipedia_ironing contains no board-length figures); replaced with a photo-based signal only.
- Applied sewguide_cover's ~3/8in padding figure into `padding_density_class`'s definition and backfill_note, so the facet's own two values now use the number its reference already supplied.
- Rejected nothing outright: all 7 required fixes were applied. The two new accessory facets and the height-adjustability facet are single-sourced (sewguide_pressingtools) rather than two-sourced — curl attempts against ~15 other buying-guide/brand/standards sites this run all hit 403/404/429/bot-challenge (same pattern this register's notes and the check report both already document), so single-sourcing follows the precedent already set by `board_format`, `mount_or_support`, `leg_locking_mechanism`, `ham_filling_material`, `seam_roll_firmness` and `clapper_wood_finish`, all of which are single-sourced in this same file.