How much resin for Christmas ornaments
Ornaments are the star project of the last quarter: flat molds, big batches and lots of gifts. The classic mistake is eyeballing the whole batch and running short with the mix already in the cup. Here are the grams by size and quantity, which resin works for batch production and the string-hole trick.
Resin per ornament and batch (full disc: ceiling for silhouettes)
| Ornament | 1 pc | Set of 6 | Tree (12) |
|---|---|---|---|
| Ø6 cm · 4 mm | 14 g | 84 g | 168 g |
| Ø7 cm · 4 mm | 19 g | 114 g | 228 g |
| Ø8 cm · 5 mm | 31 g | 186 g | 372 g |
How to calculate resin for a batch of ornaments
Each flat ornament is a disc: area (π × radius²) times thickness, around 4-5 mm. A Ø7 cm disc at 4 mm is ~15 cm³, about 19 g of mix with margin. Mind the silhouettes: a star or tree fills 30-40 % less than the circle around it, so the table is your safe ceiling — you will not run short.
Which resin for batch production
A crystal-clear coating resin like Artline Crystal: transparent, fast-curing and with 60 minutes of working time — enough to fill a whole tray of molds from a single mix. Always weigh on a scale: in big batches a ratio error multiplies across every piece.
The string hole and the finish
The cleanest option is a mold with the hole built in. If yours lacks one: push a greased toothpick into the resin at the gel stage (it holds a mark but no longer flows), or drill with a fine bit after full cure. Add glitter and pigments halfway through the pour: on the surface they migrate to the edges.
Example: 12 ornaments for the tree
- Mold
- Ø7 cm discs
- Thickness
- 4 mm
- Mix/piece
- ≈ 19 g
- Pieces
- 12
- Total mix (+10 %)
- ≈ 230 g
Note: With silhouettes (star, tree) the same batch drops to about 140-160 g: the table is the ceiling.
Want the exact amount for your piece, with the A:B ratio and layer plan?
Calculate my ornament batch
Frequently asked questions
How much resin do I need for one Christmas ornament?
A flat Ø7 cm disc at 4 mm takes about 19 g of mix with margin. A silhouette of the same size (star, snowflake) needs 30-40 % less. At 5 mm thick, raise it to ~24 g.
Which resin is best for Christmas ornaments?
A fast-curing crystal-clear coating resin (Crystal type): 4-5 mm layers, very transparent, and an hour of working time to fill the whole mold tray from one mix. Deep pour here is unnecessary and painfully slow.
How do I make the hanging hole?
Three ways: a mold with the hole built in (best), a greased toothpick pushed in at the gel stage, or a fine drill bit after full cure. If you drill, go slow and hold the piece firmly — thin resin can crack.