How to Print MOC Instructions: Size, Paper and Cheap Tips
Bottom line first: three numbers decide whether your MOC instructions print correctly — resolution of at least 300dpi, A4 paper every time, and scaling set to "Actual size" with no shrinking. Print black-and-white on both sides and a 20-page plan costs under 1 yuan.
Lots of builders assemble straight off a phone, but with large plans or complex sub-structures, paper is simply easier to work with: you can spread the sheets out, mark your progress, and the screen never dims or locks on you. This guide walks the whole process in order, from printer settings to keeping the cost down.
Step 1: Check the File Format and Resolution
Look at the file before anything else. PDF is the format you want, because the layout won't reflow. If all you have is an image (JPG/PNG), confirm it is at least 300dpi — below that, text and step photos go soft the moment they are enlarged. Zoom to 200% on your computer and inspect the detail: only print it if the line edges stay crisp and the part numbers are still legible. Instructions downloaded from brickplan.cn are high-resolution PDFs, so you can skip straight to the next step.
Step 2: Set A4 Paper and the Scaling Ratio
In the print dialog, choose A4 and set scaling to "Actual size" (100%). Do not tick "Fit to page" — that shrinks the drawing and distorts the dimension callouts. If the original is A3 or larger, use "Poster" mode to split it across 2x2 or 3x3 pages, then tape the sheets together afterwards. Always run a test print of page 1 first and measure the scale bar on the sheet with a ruler; if it is off by more than 1 mm, go back and fix the settings before printing the rest.
Step 3: Choose Paper by Use Case
Paper follows the job. For a one-off build, 70-80g plain copy paper is cheap and good enough. For instructions you will disassemble and rebuild repeatedly, or want to keep long term, use 120g coated paper or laser paper — it resists tearing and doesn't smudge. If you like writing notes on the sheet, pick matte paper so the ink doesn't glare under a lamp. Colour plans look best on inkjet photo paper, but at roughly 0.5-1 yuan per sheet, only use it when you genuinely need it.
Step 4: Four Ways to Cut Printing Costs
The savings come from four moves: double-sided, black-and-white, page imposition and choosing the right shop. First, print duplex — a 20-page plan instantly uses half the paper. Second, send the parts list and text notes to black-and-white and reserve colour for the step images only. Third, combine several parts-list pages onto a single sheet to cut the page count. Fourth, compare prices: a local print shop charges about 0.1-0.3 yuan per black-and-white side and 0.5-1 yuan for colour, while online print services come in more than 40% cheaper than the shop downstairs once the volume is large.
FAQ
Q: What paper size is best for printing MOC instructions? A: A4 is enough for the vast majority of plans — step images stay clear and the pages are easy to flip through. For complex MOCs above 3000 parts, A3 is worth considering, but the cost roughly doubles. Test print one page and check the scale bar before running the whole file, or you risk wasting the lot.
Q: The text is too small to read once it's printed. What do I do? A: Scale the page to 150%-200% in the software first and print it in sections, or use poster mode to enlarge it and split it across pages. After enlarging, re-check the scale bar so the part dimension callouts are still accurate — otherwise the build goes wrong.
Q: What's the difference between colour and black-and-white prints? A: Colour lets you separate similar shades (dark grey versus light grey) and is easier on the eyes. Black-and-white is more than 70% cheaper and works fine when the part colours are clearly distinct. On a tight budget, print the step pages in colour and the parts lists in black-and-white.
Q: Home printer or print shop — which is better value? A: Below 50 pages a month, the print shop wins, at about 0.1-0.3 yuan per black-and-white side. If you print often, a printer in the 1000-yuan class brings the cost per sheet down to about 0.05 yuan, but you have to factor in ink consumables — it only pays off with steady, high-volume printing.
Q: How should I store printed instructions so they don't get damaged? A: Keep them in clear plastic sleeves or folders, one set per binder, and avoid folding and damp. For plans you use constantly, punch holes and put them in a ring binder so they lie flat while you build. For long-term storage, choose 120g paper or heavier and keep it in a dry place out of direct light.