Question 1

What exactly does ZG3D Studio do?

Accepted Answer

We are a 3D printing workshop in Zagreb. You send a 3D file, see the price in seconds, and we print it in the material and colour you choose and ship it anywhere in the EU. We also model parts from a sketch, a photo or a broken original, and print small series for companies.

Question 2

Do I need an account or a minimum order?

Accepted Answer

No account and no minimum order: one part is fine. The only floor is a minimum price of €4.50 per part, because every print needs the same preparation, however small it is.

Question 3

How big can a print be?

Accepted Answer

In one piece: up to 256 × 256 × 256 mm on our FDM printers and 218 × 123 × 220 mm (width × depth × height) in resin. Bigger parts are split into sections with alignment keys and glued; the quote shows when that happens and adds the assembly.

Question 4

Can you print in several colours?

Accepted Answer

Yes. PLA, PETG and silk PLA print in up to 4 colours in the same part, TPU in up to 2. ASA, ABS, PA-CF, wood PLA and resin print in one colour. In the quote studio you assign the colours by part, by layer or by painting regions on the model.

Question 5

What if a print fails or arrives wrong?

Accepted Answer

If it's our fault (a defect, wrong material or colour, a part out of the tolerance we promised, damage in transit), we reprint it for free or refund it, your choice. Tell us within 7 days of delivery with a photo; we answer within one working day.

Question 6

Do you do post-processing?

Accepted Answer

Support removal and cleaning are always included. On request we add brass heat-set threaded inserts (M2 to M5), light sanding of visible faces, or assembly of split parts. For priming, painting or anything else, write to us first and we'll tell you honestly whether we can do it well.

Question 7

Do you have a discount for students and schools?

Accepted Answer

Yes. Students, teachers, schools and university labs get an education discount. Write to us from your school or university e-mail address with your file or order and we'll tell you what applies.

Question 8

How is the price calculated?

Accepted Answer

From your part's real geometry, read in your browser: volume and surface give the grams of material for the walls and infill you pick, the layer height gives the machine time, and every colour change adds purge and time. Then quantity discounts apply on their own. What you see is the total with VAT, before shipping.

Question 9

How and when do I pay?

Accepted Answer

After we've checked your file. You send the order (nothing is charged), a person checks that it will print well, usually within one working day, and we e-mail you a secure payment link: card, Apple Pay, Google Pay or bank transfer. Printing starts when the payment arrives.

Question 10

What if the file check finds a problem?

Accepted Answer

We tell you before you pay. Often it's a quick fix we do for free (a hole in the mesh, the wrong units). If the part needs a different orientation, material or a change that moves the price, we send the new price and you decide. You never pay for a print we think will fail.

Question 11

Are prices with VAT? Do I get an invoice?

Accepted Answer

Yes, every price includes VAT, and every order comes with an invoice by e-mail. For a company, add its name, address and OIB or EU VAT number to the order and the invoice is issued to the company.

Question 12

Are there quantity discounts?

Accepted Answer

Yes, per identical part, applied automatically in the quote: 5+ pieces: −8 %, 10+ pieces: −15 %, 25+ pieces: −22 %. For runs of hundreds, write to us for a series price.

Question 13

Can I change or cancel my order?

Accepted Answer

Freely until you pay: just reply to our e-mail. After payment, write as soon as possible; if the part hasn't started printing, we change or cancel it and refund in full. Once it's printing it's made to your file, so it can't be cancelled (see Returns).

Question 14

How much does shipping cost?

Accepted Answer

It depends on the country, and it's free over a threshold: Croatia: €4.90, free over €40, 1-2 working days · Neighbours and central Europe: €9.90, free over €65, 2-3 working days · Western and southern Europe: €9.90, free over €65, 3-5 working days · Nordics, Baltics, islands and the far west: €12.90, free over €65, 4-7 working days. The quote shows the exact fee for your country before you send the order.

Question 15

How long until my parts arrive?

Accepted Answer

Most orders are printed and dispatched in 1-3 working days after payment; big series or long prints take longer and we say so in the check. Then the courier needs 1-2 working days in Croatia and 2-7 in the rest of the EU, depending on the country.

Question 16

Do you ship outside the EU?

Accepted Answer

For now we ship to the 27 EU countries only, which keeps prices free of customs and import VAT surprises. If you're in Switzerland, Norway, the UK or the Western Balkans, write to us and we'll see what's possible.

Question 17

Will I get a tracking number?

Accepted Answer

Yes. When the parcel leaves the workshop you get an e-mail with the courier's tracking link. Parts are inspected and packed in a kraft box with paper padding, no plastic fill.

Question 18

Can I pick up my order in Zagreb?

Accepted Answer

Yes, free. Choose pickup in the order and we e-mail you when the parts are ready to agree a time at the workshop.

Question 19

Can I get it in a BOX NOW parcel locker?

Accepted Answer

In Croatia, yes: choose a BOX NOW locker instead of home delivery and you pick it up whenever suits you, with the code you get by SMS and e-mail. Same price as delivery in Croatia.

Question 20

My parcel arrived damaged. What now?

Accepted Answer

Take a photo of the box and the parts before throwing anything away and send it to us within 7 days. We reprint the damaged parts at no cost and deal with the courier ourselves.

Question 21

Which file formats can I upload?

Accepted Answer

STL, 3MF, OBJ, GLB and PLY, up to 80 MB. 3MF is the best choice: it keeps units and several parts. For STEP or other CAD formats, export an STL or 3MF (see the file guide below) or e-mail us the STEP and we'll convert it.

Question 22

I don't have a 3D file. Where can I find one?

Accepted Answer

Printables, Thingiverse, Thangs, MyMiniFactory and Cults3D have millions of models, many free. Check the licence: some don't allow commercial use or selling the prints. If what you need doesn't exist, we model it for you from a sketch, photos or the original part.

Question 23

How accurate are the parts?

Accepted Answer

Typically ±0.2 mm on FDM parts and about ±0.1 mm in resin. For parts that fit together, leave 0.2-0.3 mm of clearance per side; for holes that must be exact, tell us in the order and we print them slightly undersize so they can be reamed, or we fit a threaded insert.

Question 24

What is the minimum wall thickness?

Accepted Answer

1.2 mm for FDM (0.8 mm at the very least), 1.6 mm for flexible TPU and 0.8 mm in resin. Small details: 0.8 mm on FDM and 0.3 mm in resin; embossed or engraved text at least 0.6 mm deep and 2 mm tall. The file guide below has the full table.

Question 25

My model looks tiny (or huge). What happened?

Accepted Answer

STL files carry no units, so we read them in millimetres. A model drawn in inches or metres shows up 25 times too small or 1000 times too big. Check the size the quote shows and scale it there, or export again in millimetres (3MF keeps the units).

Question 26

Can you fix my file?

Accepted Answer

Small repairs are free and part of the check: holes in the mesh, flipped faces, wrong units, overlapping shells. Design changes (thicker walls, new holes, splitting a part) are 3D modelling and we quote them before doing anything. Send the file and a line saying what you need.

Question 27

What happens to my files? Can you sign an NDA?

Accepted Answer

Your files are used only to quote and print your order; we never share, publish or reuse them. They're deleted a set time after the order is finished (period to be confirmed, see the privacy policy). For confidential projects we sign your NDA, or send ours, before you send the files.

Question 28

Will you print anything I send?

Accepted Answer

Almost. You must have the right to print the design, so no copies of protected brands or characters without a licence. We don't print weapons or weapon parts, replica firearms, items made to break the law, or anything hateful. If a file raises a doubt, we ask before quoting.

Question 29

Which material should I choose?

Accepted Answer

PLA for most things: models, decoration, prototypes. PETG for functional parts, water and a bit of heat. ASA outdoors (it resists sun and weather). ABS for heat and post-processing. TPU when it must bend. PA-CF (nylon with carbon fibre) for stiff, strong, heat-resistant parts. Silk and wood PLA for looks. Resin for very fine detail like miniatures and jewellery masters.

Question 30

Are 3D printed parts strong enough for real use?

Accepted Answer

Yes, chosen well. Brackets, clips, jigs, enclosures and spare parts work every day in PETG, ASA and PA-CF. FDM parts are a little weaker between layers, so tell us how the part is loaded and we orient it so the force runs along the layers, and raise walls and infill where it matters.

Question 31

Which materials stand heat and the outdoors?

Accepted Answer

PLA softens around 55 °C (don't leave it in a car in summer). PETG takes about 70 °C, ABS about 90 °C, ASA about 95 °C and stays stable in the sun, and PA-CF goes up to about 160 °C. For outdoor parts choose ASA, or PETG out of direct sun.

Question 32

Are your prints food-safe?

Accepted Answer

We don't certify any part as food-safe. Even with a food-grade filament, the layer lines hold bacteria and can't be cleaned properly. For cookie cutters and moulds that touch food briefly, PETG is the better choice, used once and with care.

Question 33

Do you print small series for companies?

Accepted Answer

Yes: from a handful to a few hundred identical parts, printed with the same settings so every piece matches the first. Discounts apply automatically from 5 pieces; for larger runs we quote a series price and a delivery plan.

Question 34

Can my company pay by invoice?

Accepted Answer

Yes. Every order gets an invoice to your company's name and OIB or VAT number, and you can always pay by bank transfer. For repeat orders, ask us about paying on invoice with agreed terms.

Question 35

Can you design the part for us?

Accepted Answer

Yes. We model from a sketch, a technical drawing, photos or a broken original (reverse engineering), send you the 3D file to approve, and print it. You get the source file to keep. See 3D modelling for how it works.

Format	Best for	Good to know
3MF	Everything (our favourite)	Keeps units, several parts and colours. Choose it when your software offers it.
STL	Any CAD or 3D tool	The universal one. Carries no units (we read millimetres) and no colour.
OBJ	Models from 3D art tools	Fine for shape; check the size, as units depend on the exporting app.
GLB	Blender, web and scanned models	We read the geometry; textures are ignored, colours are chosen in the quote.
PLY	3D scans	Often heavy and full of holes: we close small gaps for free.
STEP	Engineering CAD	Not uploaded directly: export an STL or 3MF, or e-mail us the STEP and we convert it. Upload limit: 80 MB.

Material	Wall	Smallest detail	Smallest hole
PLA, PETG, ASA, ABS, silk & wood PLA	1.2 mm (0.8 at least)	0.8 mm	Ø 2 mm
TPU (flexible)	1.6 mm	1.2 mm	Ø 3 mm
PA-CF (carbon nylon)	1.6 mm	1.0 mm	Ø 2.5 mm
Resin	0.8 mm (0.5 if supported)	0.3 mm	Ø 0.8 mm

Everything people ask before they print

General

Ordering & payment

Shipping

Files & technical

Materials

Business

Send a file that prints right the first time

Formats we take

Exporting from your software

A quick check before you upload

Minimum walls and details per material

Ask us to fix a file