Working With Polycarbonate Chocolate Moulds: A Step-by-Step Guide

Polycarbonate moulds are what give bonbons and chocolate bars that glass-like shine and crisp, professional shape — but only if the chocolate is tempered and handled correctly. Get it wrong and you’ll end up fighting the mould instead of the chocolate. Here’s a straightforward, step-by-step process for working with polycarbonate moulds at home or in a small bakery in the UAE.

Why Polycarbonate Beats Silicone for Shine

Silicone moulds are flexible and easy to release from, but they don’t give chocolate the same glass-smooth, glossy finish. Polycarbonate is rigid and has a naturally smooth surface, so properly tempered chocolate takes on that shine as it sets against it — which is why professional chocolatiers use polycarbonate almost exclusively for bonbons, bars and shaped pieces.

Step-by-Step: Moulding With Polycarbonate

1. Make sure the mould is spotless and dry

Any trace of water, dust or fingerprints will show up on the finished chocolate. Polish the cavities with a soft cotton cloth or cotton wool before you start — never a rough cloth that can scratch the surface.

2. Add colour before you add chocolate (optional)

If you want a coloured or metallic finish, apply oil-based colour thinly to the cavities with a brush or airbrush and let it set slightly before pouring your tempered chocolate. Oil-based colours are made to bond properly with cocoa butter, unlike water-based colours which will seize the chocolate.

3. Temper your chocolate properly

This is the step most home bakers rush. Chocolate that isn’t in temper will look dull, feel soft at room temperature and release poorly no matter how good the mould is. A dedicated melting machine helps you hold chocolate at a stable working temperature through the whole batch, rather than it drifting up and down like it does over a stovetop.

4. Fill and tap out air bubbles

Pour or pipe tempered chocolate into each cavity, then tap the mould firmly on the counter, or use a mould vibrator to settle the chocolate and force air bubbles up and out. Air bubbles are one of the most common causes of pitted, unprofessional-looking bonbons.

5. Scrape and set

Scrape the excess chocolate off the top of the mould with a straight-edged scraper for a clean, flat back, then let it set at a cool room temperature — avoid the fridge unless your kitchen is genuinely too warm, since rapid cooling can cause condensation and dull the shine.

6. Release gently

Properly tempered chocolate should drop out of the mould on its own, or with the lightest tap, showing a clean, glossy face. If it’s sticking or looks streaky, the chocolate wasn’t fully in temper.

Related Products You May Need

• 28 Cavity Diamond Shaped Polycarbonate Chocolate Mould — a versatile shape for bonbons and bars.
• 21 Cavity Concave Oval Shape Polycarbonate Chocolate Mould — good for filled bonbons with a defined edge.
• 8 Cavities Heart Polycarbonate Chocolate Mould — a classic shape for gifting and occasion boxes.
• Colour Mill Pastel Oil-Based Food Colouring Pack — cocoa-butter-compatible colour for painting mould cavities.
• Commercial Electric Chocolate Melting Machine — holds chocolate at a stable working temperature.
• Chocolate Mold Vibrator — settles chocolate and clears air bubbles before setting.

Common Mistakes to Avoid

• Pouring chocolate that’s out of temper — no mould, however good, will fix under- or over-tempered chocolate.
• Using water-based colours directly on the mould — they seize chocolate on contact; only oil-based, cocoa-butter-compatible colours work here.
• Skipping the tap-out or vibration step — trapped air bubbles are one of the most common causes of a pitted, amateur-looking finish.
• Refrigerating to speed up setting — this often causes condensation on the surface, leaving a dull, spotty finish instead of a shine.

Frequently Asked Questions

Can I use silicone moulds instead of polycarbonate?

Yes, and they’re easier to release from, but silicone won’t give the same glossy, glass-like shine that polycarbonate produces. Use polycarbonate when the finish matters, silicone when ease of release matters more.

How do I know if my chocolate is properly tempered?

Tempered chocolate sets with a firm snap and a glossy finish at room temperature, without streaks. A small test — spreading a thin layer on baking paper and watching how it sets in a few minutes — is a quick way to check before filling a full mould.

Why did my chocolate stick to the mould?

Sticking almost always means the chocolate wasn’t fully tempered, or the mould had a smudge, fingerprint or trace of moisture before filling. Polish the mould thoroughly and re-check your temper.

How long does chocolate take to set in a polycarbonate mould?

At a cool room temperature (around 18–20°C), most cavities set in 15–30 minutes depending on thickness. Setting faster in the fridge isn’t recommended, as it increases the risk of condensation and a dull finish.

Once you’ve got tempering and technique down, the mould shape becomes the fun part. Browse our full range of polycarbonate chocolate moulds and oil-based food colours to start your next batch.