THC Molecule on a Cannabis Leaf Base — 7-Colour Bambu Lab H2C Model (CAS 1972-08-3)

Delta-9-tetrahydrocannabinol, built atom by atom — on a cannabis leaf.

A ball-and-stick model of THC (C21H30O2) standing on red pencil pillars above a 160 mm blue grey display base. Every atom carries its element letter — 21 carbons, 30 hydrogens, 2 oxygens — in the usual chemistry colours, so students can count them and find the ring system and the side chain themselves. The base carries a raised green cannabis leaf, the formula and the TETRAHYDROCANNABINOL / CAS 1972-08-3 label in white.

This is a chemistry teaching model of one molecule. It says nothing about growing, extracting or using cannabis.

Made for one printer: Bambu Lab H2C, seven colours in one run

All seven nozzles are used, one colour each; Bambu Studio assigns them to the two extruders. No painting, no gluing — the colours come out of the printer.

• Jade White 10100 · 31.0 g — hydrogen atoms, single and C=C bonds, letters on C and O, logo, formula, label, text and QR code on the underside

• Black 10101 · 17.7 g — carbon atoms, pencil graphite, letters on H

• Red 10200 · 23.0 g — oxygen atoms, pencil bodies

• Light Gray 10104 · 5.3 g — metal ferrules on the long pencils

• Mistletoe Green 10502 · 3.0 g — the cannabis leaf

• Blue Gray 10602 · 140.1 g — the base

• Gold 10401 · 14.4 g — sharpened wood and erasers

Which file?

• SLICED G-code 3MF — our exact settings with the G-code already inside: preview it in Bambu Studio or send it straight to the H2C.

• 3MF project with settings — the same project without G-code: open it, adjust what you like and slice it yourself.

• One STL per printing colour (for other multicolour printers, manual colour assignment, untested) is in the full package on the model page.

Print settings (checked in Bambu Studio 02.08.02.61)

• Bambu PLA Basic · 0.4 mm nozzle on every nozzle · 0.16 mm layers (0.16mm Standard @BBL H2C, Arachne walls)

• Supports: normal, snug, threshold 42°, in the colour of the active nozzle; all of them stand on the base or on the model — none on the build plate

• Slicer estimate: 17 h 21 min, about 234.5 g of filament, 788 filament changes

• Pencil diameters 3.5 / 5 / 7 mm by length — 5 mm pencils everywhere would not fit between the atoms of this molecule

The leaf was drawn for a 0.2 mm nozzle: its outline and main veins print at 0.4 mm, the finest texture shows only in the renders.

After printing

Remove the slicer supports carefully; the red pencils stay — they are part of the model. Want the molecule on its own? Cut each pencil across the graphite where it meets the small cone under the atom, with flush cutters. We have not tried this on a physical multicolour print yet.

Honest status

• Pictures are renders, not photos. A physical test print of this multicolour release has not been made yet.

• Slicer check: no unsupported spots on the model, no supports on the build plate.

• One open item, not hidden: two carbon atoms carry a point-sized fragment (zero volume, under 0.1 mm) left by the geometry booleans — far below anything a printer can print.

Printed it? Post a Make and tell us whether the letters are readable and the supports came off cleanly — a failed print tells us just as much.

More about this model

• Molecule page (3D viewer, data, downloads, colour preview): molgod.org/molecule/1972-08-3

• Licence record: molgod.org/licenses/stl/1972-08-3

Licence: CC BY-NC-SA 4.0 — free to print, share and adapt for non-commercial use (home, school, university, library, makerspace, museum). Selling the files or prints, and paid 3D printing services, need our commercial licence: [email protected].

Attribution: Tetrahydrocannabinol (CAS 1972-08-3) READY TO PRINT MULTICOLOR CANNABIS LEAF, release r2, 2026-11-02, by MolGod.org — https://molgod.org/molecule/1972-08-3/ — CC BY-NC-SA 4.0. Renders: CC BY-NC-SA 4.0, like the model. Texts: all rights reserved. The MolGod.org name and logo are not licensed.