How much resin for letters and numbers
Resin letters and numbers are made in a silicone mold and use little resin, but each font fills its cavity differently. Here is an estimate by height, how to fine-tune it with the mold capacity and how to mix small amounts without missing the ratio.
Resin per letter and per name
| Letter | 1 letter | Name (5) | 10 letters |
|---|---|---|---|
| Letter ~8 cm | 22 g | 110 g | 220 g |
| Letter ~12 cm | 52 g | 260 g | 520 g |
| Letter ~15 cm | 100 g | 500 g | 1000 g |
How to calculate resin for letters
The exact way is the mold capacity in ml: fill it with water, weigh it (1 ml ≈ 1 g of water) and multiply by the resin density (~1.12 g/ml). If you cannot, estimate the stroke volume (height × average stroke width × thickness). The table assumes a well-filled letter of that height; thin-stroke fonts use less.
Which resin to use
A fast-curing crystal coating resin like Artline Crystal for thin decorative letters; if the mold is thick (over 1.5-2 cm) or solid, a deep pour avoids overheating. Pigments and glitter are dosed at 2-5 % of the weight so the cure is not broken.
Small mixes without errors
At 20-60 g, a 0.1 g scale makes the difference: by eye the A:B ratio drifts and the resin stays tacky. Mix slowly, scrape the cup walls and let it rest a minute before pouring.
Example: 5-letter name
- Height
- ≈ 12 cm
- Resin/letter
- ≈ 52 g
- Letters
- 5
- Total (+10 %)
- ≈ 260 g
- Scale
- 0.1 g
Note: The figure depends heavily on the font: a bold sans-serif uses more than a thin, stylised one.
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Frequently asked questions
How much resin do I need for one letter?
A well-filled letter about 12 cm tall takes ≈ 52 g of mix. The most exact way is to measure the mold capacity in ml and convert it to grams with the density.
Which resin for letters?
A fast-curing crystal coating resin for thin letters; a deep pour if the mold is thick or solid, so it does not overheat.
How do I calculate resin if I do not know the mold volume?
Fill the mold with water and weigh it: the millilitres are almost the same as grams of water. Multiply those ml by the resin density (~1.12) for the grams of mix.