[kingbedjed]

The request

Asked for in Slack #labware-requests (C0BT14F1GTF) by Slack user
U0AQKVCJ3LG on 2026-10-20:

Corning Falcon 6 well Clear Flat Bottom 353046

Permalink: https://ramonaoptics.slack.com/archives/C0BT14F1GTF/p1792534245664239?thread_ts=1792534245.664239&cid=C0BT14F1GTF

Closes #33

Decisions needed

• A1 position is derived, not published. Corning publishes no A1 offset for
  any Falcon multiwell plate, and its cell culture dimension sheet, which does
  carry A1 Row/Column Offset columns, lists only Costar catalogue numbers. The
  offsets here centre the 2 x 3 grid on the footprint: 24.575 mm from the left,
  23.115 mm from the top. That is supported by the Costar 6-well drawing
  DWG00673, which dimensions A1 directly at 24.76 / 23.16 mm on a 39.12 mm pitch
  and a 127.76 x 85.47 mm footprint, i.e. centred to within 0.1 mm in both axes.
  (The Costar 24-well is the format that is not centred; the 6-well is.) Not
  checked against a plate in hand.
• One pitch value for both axes. The sheet prints a single "Center to
  center = 39.24". It is used for both axes, as on every Falcon multiwell sheet.
  DWG00673 dimensions the equivalent Costar spacing "Typ." on both runs, which
  supports it, but it is still a reading rather than a printed pair.
• Two existing files describe this same mould under the old diameter
  convention. Corning_351146_6_well_plate.json and
  Corning_353502_6_well_plate.json put the 35.71 mm well opening in
  diameter, which was the convention when they were written. This file follows
  the current one: diameter is the 35.00 mm floor and diameter_top the
  35.71 mm opening. The three files are otherwise consistent. Correcting the
  two older ones is left out of this PR deliberately — say if it should be
  folded in instead.

What is included

file	plate	pitch	grid	floor
labware/definitions/Corning_353046_6_well_plate.json	Corning Falcon 353046 6 well	39.24 mm	2 x 3	1.52 mm clear polystyrene

One row added to the parametrised list in
tests/test_labware.py::test_plate_definition_files_can_be_loaded.

Figures

rendered from the JSON on this branch	the vendor's own documents

Left: the plate as this branch's JSON describes it. Right, top: page 2 of
Corning's Customer Technical Data Sheet LSR00001 Rev 5, the page every printed
dimension here was transcribed from —
https://www.corning.com/catalog/cls/documents/drawings/LSR00001.pdf. Right,
bottom: the catalogue photo for 353046 from Corning's product page —
https://www.corning.com/catalog/cls/products/f/falconPlates/353046/images/353046_A.jpg/_jcr_content/renditions/product.zoom.1200.jpg.

Sources used

• Corning Life Sciences, "Customer Technical Data Sheet – Multiwell TC Plates
  – 6 Well", document LSR00001 Rev 5, (c) 2013-2018 — controlling, cited as
  drawing_reference. Page 2 carries the catalogue table and the lid, plate and
  well dimension blocks.
• Corning eCatalog page for 353046 — cited as web_reference. Gives the
  catalogue title ("Falcon 6-well Clear Flat Bottom TC-treated Multiwell Cell
  Culture Plate, with Lid, Individually Wrapped, Sterile, 50/Case"), round
  wells, growth area 9.6 cm², TC-treated, sterile, lid included, media working
  volume 2.5-3 mL.
• Traps hit, for the next person:
  • There is no per-catalogue drawing and no per-catalogue Product
    Description for the Falcon multiwell plates:
    certs-ecatalog.corning.com/life-sciences/product-descriptions/353046.pdf
    is a 404. LSR00001 is the whole of the evidence.
  • www.corning.com 403s a bare curl. The TDS downloads with the full browser
    header set (UA + Accept + Referer + Sec-Fetch-*); the product image needs
    the same plus Referer: https://www.corning.com/. ecatalog.corning.com
    answers a plain browser user-agent.
  • Unlike the 24-well sheet LSR00003, LSR00001 prints a single dimension
    block for every catalogue number in its table, the notched plate included —
    so 353046 / 353224 / 353934 / 353846 / 351146 / 353502 are one mould. Do not
    assume the 24-well sheet's two-column layout here.

Judgement calls

• diameter = 35.00 mm is the well bottom ("Bot. Int. Diameter"), where the
  sample sits; diameter_top = 35.71 mm is the opening ("Top Int.
  Diameter"). Cross-checked: the sheet's own growth area of 9.619 cm² gives
  2·√(9.619/π) = 35.00 mm, which agrees with the printed bottom diameter to
  0.004 mm and confirms that figure is the imaged surface.
• A1 offsets are derived by centring — see Decisions needed.
• A single printed pitch is taken as equal in both axes — see Decisions
  needed.
• bottom_elevation / floor_height are left out. Subtracting the sheet's
  own numbers, 20.19 − 17.65 − 1.52 = 1.02 mm would be the underside of the well
  floor above the resting plane, but only if the well rim is flush with the top
  of the plate, which the sheet neither states nor draws. It is recorded in
  notes as arithmetic rather than written into the file.
• No skirt is dimensioned on the sheet, so skirt_outline, skirt_height and
  skirt_thickness are left out and the ANSI/SLAS defaults are assumed. Wall
  thickness between wells is not published either.
• height is the plate alone (20.19 mm, sheet F); height_with_lid is
  21.43 mm ("Ht. w/lid on"). The lid (127.20 × 85.14 × 10.03 mm) is not
  modelled.
• surface_treatments records tissue culture, which is 353046's own surface;
  the siblings sharing this geometry include non-treated (351146) and Primaria
  (353846) items, named in notes.

Testing

• python -m pytest -q → 184 passed on the final commit.
• lint as CI runs it (pixi exec … ruff check . && ruff format --check . && ty check) → All checks passed!, 4 files already formatted, All checks passed!.
• check_labware.py:

Corning_353046_6_well_plate.json
  name            'Corning Falcon 353046 6 well'   part '353046'
  footprint       127.630 mm x 85.470 mm x 20.190 mm
  grid            2 rows x 3 cols, pitch 39.240 mm
  well            circle, 35.710 mm at the top, 35.000 mm at the bottom, 17.650 mm deep, flat bottom
  A1 centre       24.575 mm from left, 23.115 mm from top
  far margins     24.575 mm right, 23.115 mm bottom
  centred A1      24.575 mm / 23.115 mm  (delta 0.000 mm / -0.000 mm)
  ok

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Opened by the add-labware skill of ramona-claude 0.8.0 (ramona-llm 1c2c46e+dirty, prompt bc769991, $1.97).