3D printing builds an object one thin layer at a time from a digital model. Instead of cutting material away, the printer adds it only where the part needs it. That is why one-offs, personalised items and odd shapes cost far less to make than with moulds or machining.
The three technologies you'll hear about
| Technology | How it works | Best for |
|---|---|---|
| FDM (filament) | A heated nozzle melts plastic filament and draws each layer. | Gifts, home goods, functional parts, prototypes, multi-colour prints, larger items. |
| Resin (SLA / MSLA) | UV light hardens liquid resin layer by layer. | Tiny detail: miniatures, jewellery masters, dental and figurine work. |
| SLS (powder) | A laser fuses nylon powder; no supports needed. | Tough engineering parts and complex assemblies, usually via industrial bureaus. |
Most everyday jobs, from a tissue box shaped like a crocodile to a replacement clip for a caravan blind, are FDM. It is affordable, uses durable plastics and can now print several colours in one go.
What a print job actually involves
- A model. An STL, 3MF or STEP file, or a model we draw from your photo, sketch or measurements.
- Slicing. Software cuts the model into layers and decides wall thickness, infill and supports.
- Printing. Small items take under an hour; large or detailed ones can take a day or more.
- Finishing. Removing supports, cleaning edges and checking fit before it is packed.
What 3D printing is not good at
It is not the cheapest way to make thousands of identical parts; injection moulding wins there. Layer lines are visible up close on FDM prints, and parts are slightly weaker between layers than along them. Good design and the right orientation solve most of this, which is covered in our design guide.
Common questions
Is 3D printing safe for food?
Most printed parts are not food-safe out of the box because layer lines trap bacteria. Use them for dry items or as cookie cutters that are washed and used briefly, or ask us about food-contact options.
How big can a 3D print be?
Desktop FDM printers usually handle around 25 cm per side. Bigger items are printed in sections and joined.