Quality Control in a 3D Printing Studio: What We Check Before Shipping

A 3D print does not go from the printer bed straight into a box. Between those two points there is a quiet half hour that decides whether you open the parcel and smile or open it and write us a message. Here is what Fantasy Lab 3D checks on every order, from a single keychain to a 1:1 helmet, and what happens when something fails.

Why a check is needed at all

3D printing is reliable, but it is not a photocopier. A printer runs for hours, sometimes days, and the environment shifts while it works: room temperature drifts, filament absorbs moisture, a nozzle picks up a speck of debris. Most of the time the result is perfect. Occasionally there is a small defect the printer itself will never notice. The check exists so that you never see those.

Step 1: the print still on the bed

The first look happens before the model is removed.

• Did the print finish? A filament runout or a power blip can leave a model that looks complete from one side and is missing its top on the other.
• First layer and base. The bottom should be flat, fully fused, with no gaps and no "elephant foot" (a slightly bulging first layer).
• Warping. Corners that lifted off the bed show up later as a rocking base. We check flatness on a glass plate.
• Layer shifts. A single layer offset by even 0.3 mm produces a visible step across the whole model. This is an automatic reprint.

Step 2: surface and detail

Once the supports are off, the model gets a slow turn under a bright lamp.

• Stringing and blobs. Fine hairs between towers and small zits on the surface are removed with a knife and a quick pass of heat. If there are too many, the settings were wrong and we print again.
• Support scars. Wherever scaffolding touched the model there is a slight mark. On a display face it is sanded until invisible; on a hidden underside a light mark is acceptable, and we tell you where it is. More on this in our guide to support structures.
• Missing detail. On resin miniatures we compare the print with the digital model under magnification: fingers, weapon tips, facial features. A finger that did not resolve means the orientation or exposure was off.
• Under-extrusion. Thin, sparse-looking walls where light shows through the layers.

Step 3: dimensions and fit

For anything functional, we measure rather than eyeball.

What we measure	How	Typical target
Overall size	Digital caliper	Within roughly 0.2 to 0.5 mm on FDM, tighter on resin
Holes and pegs	Test pin or the mating part	Slides together without force, no rattle
Flatness	Glass plate	No rocking
Wall thickness	Caliper at three points	As designed

Multi-part models are test-assembled before shipping. A book nook is put together fully, the LED strip is switched on, and only then is it taken apart again for packing. A chess set gets every piece placed on the board. If a peg is tight we ease it now, not you later. If you want to know what accuracy is realistic in the first place, see how accurate 3D printing really is.

Step 4: colour, finish and cure

• Colour match. Filament batches vary slightly. All parts of one model are printed from the same spool so a vase body and its lid never differ by a shade.
• Resin cure. Under-cured resin feels faintly tacky and smells. Every resin part is washed, dried and cured, then left overnight to confirm no softness remains.
• Painted pieces. Primer coverage, clean paint edges, even varnish, and a 48-hour hardening period before anything is wrapped. The full routine is in our post-processing guide.

What fails, and what happens next

Defects fall into three groups:

1. Fixable in minutes: a string, a small blob, a light support mark. Cleaned and passed.
2. Fixable with work: a scratched surface, a slightly tight fit. Sanded, filled, eased, then rechecked.
3. Reprint: layer shift, warped base, missing detail, wrong dimension, crack. The part goes back to the printer and you are not charged twice.

At Fantasy Lab 3D the rule is simple: if we would not put it on our own shelf, it does not go in the box. If a reprint pushes your deadline, we tell you straight away rather than hoping to catch up in silence.

Step 5: photos and packing

Every finished order is photographed before it is wrapped, partly for our records and partly so you can see exactly what left the studio. Then the piece goes through the packing routine described in how we pack fragile prints, with cradles for thin parts and a double box for anything delicate.

Ready to order?

Tell us what you would like made and Fantasy Lab 3D will quote it, print it and check it exactly as described above. Reach us through the contact section or DM us on Instagram @fantasylab3d.almaty, and feel free to ask for photos of your piece before it ships.